feat: Implement the course discovery and catalog page, including filtering, search, and course detail view.

Backend/jest.config.js

@@ -0,0 +1,22 @@
+/** @type {import('jest').Config} */
+const config = {
+    preset: 'ts-jest',
+    testEnvironment: 'node',
+    roots: ['<rootDir>/tests'],
+    testMatch: ['**/*.test.ts'],
+    moduleNameMapper: {
+        '^@/(.*)$': '<rootDir>/src/$1'
+    },
+    clearMocks: true,
+    collectCoverageFrom: [
+        'src/**/*.ts',
+        '!src/**/*.d.ts',
+        '!src/generated/**',
+        '!src/server.ts'
+    ],
+    transform: {
+        '^.+\\.tsx?$': ['ts-jest', { tsconfig: './tsconfig.test.json' }]
+    }
+};
+
+module.exports = config;

Backend/package.json

@@ -44,6 +44,7 @@
         "@types/bcrypt": "^5.0.2",
         "@types/cors": "^2.8.17",
         "@types/express": "^5.0.0",
+        "@types/jest": "^30.0.0",
         "@types/jsonwebtoken": "^9.0.7",
         "@types/multer": "^1.4.12",
         "@types/node": "^22.10.5",

Backend/pnpm-lock.yaml

@@ -78,6 +78,9 @@ importers:
       '@types/express':
         specifier: ^5.0.0
         version: 5.0.6
+      '@types/jest':
+        specifier: ^30.0.0
+        version: 30.0.0
       '@types/jsonwebtoken':
         specifier: ^9.0.7
         version: 9.0.10
@@ -119,7 +122,7 @@ importers:
         version: 7.2.2
       ts-jest:
         specifier: ^29.2.5
-        version: 29.4.6(@babel/core@7.28.5)(@jest/transform@29.7.0)(@jest/types@29.6.3)(babel-jest@29.7.0(@babel/core@7.28.5))(jest-util@29.7.0)(jest@29.7.0(@types/node@22.19.5))(typescript@5.9.3)
+        version: 29.4.6(@babel/core@7.28.5)(@jest/transform@29.7.0)(@jest/types@30.2.0)(babel-jest@29.7.0(@babel/core@7.28.5))(jest-util@30.2.0)(jest@29.7.0(@types/node@22.19.5))(typescript@5.9.3)
       tsconfig-paths:
         specifier: ^4.2.0
         version: 4.2.0
@@ -615,6 +618,10 @@ packages:
       node-notifier:
         optional: true
 
+  '@jest/diff-sequences@30.0.1':
+    resolution: {integrity: sha512-n5H8QLDJ47QqbCNn5SuFjCRDrOLEZ0h8vAHCK5RL9Ls7Xa8AQLa/YxAc9UjFqoEDM48muwtBGjtMY5cr0PLDCw==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   '@jest/environment@29.7.0':
     resolution: {integrity: sha512-aQIfHDq33ExsN4jP1NWGXhxgQ/wixs60gDiKO+XVMd8Mn0NWPWgc34ZQDTb2jKaUWQ7MuwoitXAsN2XVXNMpAw==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
@@ -623,6 +630,10 @@ packages:
     resolution: {integrity: sha512-GlsNBWiFQFCVi9QVSx7f5AgMeLxe9YCCs5PuP2O2LdjDAA8Jh9eX7lA1Jq/xdXw3Wb3hyvlFNfZIfcRetSzYcA==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  '@jest/expect-utils@30.2.0':
+    resolution: {integrity: sha512-1JnRfhqpD8HGpOmQp180Fo9Zt69zNtC+9lR+kT7NVL05tNXIi+QC8Csz7lfidMoVLPD3FnOtcmp0CEFnxExGEA==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   '@jest/expect@29.7.0':
     resolution: {integrity: sha512-8uMeAMycttpva3P1lBHB8VciS9V0XAr3GymPpipdyQXbBcuhkLQOSe8E/p92RyAdToS6ZD1tFkX+CkhoECE0dQ==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
@@ -631,10 +642,18 @@ packages:
     resolution: {integrity: sha512-q4DH1Ha4TTFPdxLsqDXK1d3+ioSL7yL5oCMJZgDYm6i+6CygW5E5xVr/D1HdsGxjt1ZWSfUAs9OxSB/BNelWrQ==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  '@jest/get-type@30.1.0':
+    resolution: {integrity: sha512-eMbZE2hUnx1WV0pmURZY9XoXPkUYjpc55mb0CrhtdWLtzMQPFvu/rZkTLZFTsdaVQa+Tr4eWAteqcUzoawq/uA==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   '@jest/globals@29.7.0':
     resolution: {integrity: sha512-mpiz3dutLbkW2MNFubUGUEVLkTGiqW6yLVTA+JbP6fI6J5iL9Y0Nlg8k95pcF8ctKwCS7WVxteBs29hhfAotzQ==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  '@jest/pattern@30.0.1':
+    resolution: {integrity: sha512-gWp7NfQW27LaBQz3TITS8L7ZCQ0TLvtmI//4OwlQRx4rnWxcPNIYjxZpDcN4+UlGxgm3jS5QPz8IPTCkb59wZA==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   '@jest/reporters@29.7.0':
     resolution: {integrity: sha512-DApq0KJbJOEzAFYjHADNNxAE3KbhxQB1y5Kplb5Waqw6zVbuWatSnMjE5gs8FUgEPmNsnZA3NCWl9NG0ia04Pg==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
@@ -648,6 +667,10 @@ packages:
     resolution: {integrity: sha512-mo5j5X+jIZmJQveBKeS/clAueipV7KgiX1vMgCxam1RNYiqE1w62n0/tJJnHtjW8ZHcQco5gY85jA3mi0L+nSA==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  '@jest/schemas@30.0.5':
+    resolution: {integrity: sha512-DmdYgtezMkh3cpU8/1uyXakv3tJRcmcXxBOcO0tbaozPwpmh4YMsnWrQm9ZmZMfa5ocbxzbFk6O4bDPEc/iAnA==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   '@jest/source-map@29.6.3':
     resolution: {integrity: sha512-MHjT95QuipcPrpLM+8JMSzFx6eHp5Bm+4XeFDJlwsvVBjmKNiIAvasGK2fxz2WbGRlnvqehFbh07MMa7n3YJnw==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
@@ -668,6 +691,10 @@ packages:
     resolution: {integrity: sha512-u3UPsIilWKOM3F9CXtrG8LEJmNxwoCQC/XVj4IKYXvvpx7QIi/Kg1LI5uDmDpKlac62NUtX7eLjRh+jVZcLOzw==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  '@jest/types@30.2.0':
+    resolution: {integrity: sha512-H9xg1/sfVvyfU7o3zMfBEjQ1gcsdeTMgqHoYdN79tuLqfTtuu7WckRA1R5whDwOzxaZAeMKTYWqP+WCAi0CHsg==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   '@jridgewell/gen-mapping@0.3.13':
     resolution: {integrity: sha512-2kkt/7niJ6MgEPxF0bYdQ6etZaA+fQvDcLKckhy1yIQOzaoKjBBjSj63/aLVjYE3qhRt5dvM+uUyfCg6UKCBbA==}
 
@@ -862,6 +889,9 @@ packages:
   '@sinclair/typebox@0.27.8':
     resolution: {integrity: sha512-+Fj43pSMwJs4KRrH/938Uf+uAELIgVBmQzg/q1YG10djyfA3TnrU8N8XzqCh/okZdszqBQTZf96idMfE5lnwTA==}
 
+  '@sinclair/typebox@0.34.48':
+    resolution: {integrity: sha512-kKJTNuK3AQOrgjjotVxMrCn1sUJwM76wMszfq1kdU4uYVJjvEWuFQ6HgvLt4Xz3fSmZlTOxJ/Ie13KnIcWQXFA==}
+
   '@sinonjs/commons@3.0.1':
     resolution: {integrity: sha512-K3mCHKQ9sVh8o1C9cxkwxaOmXoAMlDxC1mYyHrjqOWEcBjYr76t96zL2zlj5dUGZ3HSw240X1qgH3Mjf1yJWpQ==}
 
@@ -1115,6 +1145,9 @@ packages:
   '@types/istanbul-reports@3.0.4':
     resolution: {integrity: sha512-pk2B1NWalF9toCRu6gjBzR69syFjP4Od8WRAX+0mmf9lAjCRicLOWc+ZrxZHx/0XRjotgkF9t6iaMJ+aXcOdZQ==}
 
+  '@types/jest@30.0.0':
+    resolution: {integrity: sha512-XTYugzhuwqWjws0CVz8QpM36+T+Dz5mTEBKhNs/esGLnCIlGdRy+Dq78NRjd7ls7r8BC8ZRMOrKlkO1hU0JOwA==}
+
   '@types/json-schema@7.0.15':
     resolution: {integrity: sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA==}
 
@@ -1433,6 +1466,10 @@ packages:
     resolution: {integrity: sha512-NIxF55hv4nSqQswkAeiOi1r83xy8JldOFDTWiug55KBu9Jnblncd2U6ViHmYgHf01TPZS77NJBhBMKdWj9HQMQ==}
     engines: {node: '>=8'}
 
+  ci-info@4.4.0:
+    resolution: {integrity: sha512-77PSwercCZU2Fc4sX94eF8k8Pxte6JAwL4/ICZLFjJLqegs7kCuAsqqj/70NQF6TvDpgFjkubQB2FW2ZZddvQg==}
+    engines: {node: '>=8'}
+
   cjs-module-lexer@1.4.3:
     resolution: {integrity: sha512-9z8TZaGM1pfswYeXrUpzPrkx8UnWYdhJclsiYMm6x/w5+nN+8Tf/LnAgfLGQCm59qAOxU8WwHEq2vNwF6i4j+Q==}
 
@@ -1729,6 +1766,10 @@ packages:
     resolution: {integrity: sha512-2Zks0hf1VLFYI1kbh0I5jP3KHHyCHpkfyHBzsSXRFgl/Bg9mWYfMW8oD+PdMPlEwy5HNsR9JutYy6pMeOh61nw==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  expect@30.2.0:
+    resolution: {integrity: sha512-u/feCi0GPsI+988gU2FLcsHyAHTU0MX1Wg68NhAnN7z/+C5wqG+CY8J53N9ioe8RXgaoz0nBR/TYMf3AycUuPw==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   express-rate-limit@7.5.1:
     resolution: {integrity: sha512-7iN8iPMDzOMHPUYllBEsQdWVB6fPDMPqwjBaFrgr4Jgr/+okjvzAy+UHlYYL/Vs0OsOrMkwS6PJDkFlJwoxUnw==}
     engines: {node: '>= 16'}
@@ -2118,6 +2159,10 @@ packages:
     resolution: {integrity: sha512-LMIgiIrhigmPrs03JHpxUh2yISK3vLFPkAodPeo0+BuF7wA2FoQbkEg1u8gBYBThncu7e1oEDUfIXVuTqLRUjw==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  jest-diff@30.2.0:
+    resolution: {integrity: sha512-dQHFo3Pt4/NLlG5z4PxZ/3yZTZ1C7s9hveiOj+GCN+uT109NC2QgsoVZsVOAvbJ3RgKkvyLGXZV9+piDpWbm6A==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   jest-docblock@29.7.0:
     resolution: {integrity: sha512-q617Auw3A612guyaFgsbFeYpNP5t2aoUNLwBUbc/0kD1R4t9ixDbyFTHd1nok4epoVFpr7PmeWHrhvuV3XaJ4g==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
@@ -2146,14 +2191,26 @@ packages:
     resolution: {integrity: sha512-sBkD+Xi9DtcChsI3L3u0+N0opgPYnCRPtGcQYrgXmR+hmt/fYfWAL0xRXYU8eWOdfuLgBe0YCW3AFtnRLagq/g==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  jest-matcher-utils@30.2.0:
+    resolution: {integrity: sha512-dQ94Nq4dbzmUWkQ0ANAWS9tBRfqCrn0bV9AMYdOi/MHW726xn7eQmMeRTpX2ViC00bpNaWXq+7o4lIQ3AX13Hg==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   jest-message-util@29.7.0:
     resolution: {integrity: sha512-GBEV4GRADeP+qtB2+6u61stea8mGcOT4mCtrYISZwfu9/ISHFJ/5zOMXYbpBE9RsS5+Gb63DW4FgmnKJ79Kf6w==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  jest-message-util@30.2.0:
+    resolution: {integrity: sha512-y4DKFLZ2y6DxTWD4cDe07RglV88ZiNEdlRfGtqahfbIjfsw1nMCPx49Uev4IA/hWn3sDKyAnSPwoYSsAEdcimw==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   jest-mock@29.7.0:
     resolution: {integrity: sha512-ITOMZn+UkYS4ZFh83xYAOzWStloNzJFO2s8DWrE4lhtGD+AorgnbkiKERe4wQVBydIGPx059g6riW5Btp6Llnw==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  jest-mock@30.2.0:
+    resolution: {integrity: sha512-JNNNl2rj4b5ICpmAcq+WbLH83XswjPbjH4T7yvGzfAGCPh1rw+xVNbtk+FnRslvt9lkCcdn9i1oAoKUuFsOxRw==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   jest-pnp-resolver@1.2.3:
     resolution: {integrity: sha512-+3NpwQEnRoIBtx4fyhblQDPgJI0H1IEIkX7ShLUjPGA7TtUTvI1oiKi3SR4oBR0hQhQR80l4WAe5RrXBwWMA8w==}
     engines: {node: '>=6'}
@@ -2167,6 +2224,10 @@ packages:
     resolution: {integrity: sha512-KJJBsRCyyLNWCNBOvZyRDnAIfUiRJ8v+hOBQYGn8gDyF3UegwiP4gwRR3/SDa42g1YbVycTidUF3rKjyLFDWbg==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  jest-regex-util@30.0.1:
+    resolution: {integrity: sha512-jHEQgBXAgc+Gh4g0p3bCevgRCVRkB4VB70zhoAE48gxeSr1hfUOsM/C2WoJgVL7Eyg//hudYENbm3Ne+/dRVVA==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   jest-resolve-dependencies@29.7.0:
     resolution: {integrity: sha512-un0zD/6qxJ+S0et7WxeI3H5XSe9lTBBR7bOHCHXkKR6luG5mwDDlIzVQ0V5cZCuoTgEdcdwzTghYkTWfubi+nA==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
@@ -2191,6 +2252,10 @@ packages:
     resolution: {integrity: sha512-z6EbKajIpqGKU56y5KBUgy1dt1ihhQJgWzUlZHArA/+X2ad7Cb5iF+AK1EWVL/Bo7Rz9uurpqw6SiBCefUbCGA==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  jest-util@30.2.0:
+    resolution: {integrity: sha512-QKNsM0o3Xe6ISQU869e+DhG+4CK/48aHYdJZGlFQVTjnbvgpcKyxpzk29fGiO7i/J8VENZ+d2iGnSsvmuHywlA==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   jest-validate@29.7.0:
     resolution: {integrity: sha512-ZB7wHqaRGVw/9hST/OuFUReG7M8vKeq0/J2egIGLdvjHCmYqGARhzXmtgi+gVeZ5uXFF219aOc3Ls2yLg27tkw==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
@@ -2584,6 +2649,10 @@ packages:
     resolution: {integrity: sha512-Pdlw/oPxN+aXdmM9R00JVC9WVFoCLTKJvDVLgmJ+qAffBMxsV85l/Lu7sNx4zSzPyoL2euImuEwHhOXdEgNFZQ==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
 
+  pretty-format@30.2.0:
+    resolution: {integrity: sha512-9uBdv/B4EefsuAL+pWqueZyZS2Ba+LxfFeQ9DN14HU4bN8bhaxKdkpjpB6fs9+pSjIBu+FXQHImEg8j/Lw0+vA==}
+    engines: {node: ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0}
+
   prisma@5.22.0:
     resolution: {integrity: sha512-vtpjW3XuYCSnMsNVBjLMNkTj6OZbudcPPTPYHqX0CJfpcdWciI1dM8uHETwmDxxiqEwCIE6WvXucWUetJgfu/A==}
     engines: {node: '>=16.13'}
@@ -4027,6 +4096,8 @@ snapshots:
       - supports-color
       - ts-node
 
+  '@jest/diff-sequences@30.0.1': {}
+
   '@jest/environment@29.7.0':
     dependencies:
       '@jest/fake-timers': 29.7.0
@@ -4038,6 +4109,10 @@ snapshots:
     dependencies:
       jest-get-type: 29.6.3
 
+  '@jest/expect-utils@30.2.0':
+    dependencies:
+      '@jest/get-type': 30.1.0
+
   '@jest/expect@29.7.0':
     dependencies:
       expect: 29.7.0
@@ -4054,6 +4129,8 @@ snapshots:
       jest-mock: 29.7.0
       jest-util: 29.7.0
 
+  '@jest/get-type@30.1.0': {}
+
   '@jest/globals@29.7.0':
     dependencies:
       '@jest/environment': 29.7.0
@@ -4063,6 +4140,11 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
+  '@jest/pattern@30.0.1':
+    dependencies:
+      '@types/node': 22.19.5
+      jest-regex-util: 30.0.1
+
   '@jest/reporters@29.7.0':
     dependencies:
       '@bcoe/v8-coverage': 0.2.3
@@ -4096,6 +4178,10 @@ snapshots:
     dependencies:
       '@sinclair/typebox': 0.27.8
 
+  '@jest/schemas@30.0.5':
+    dependencies:
+      '@sinclair/typebox': 0.34.48
+
   '@jest/source-map@29.6.3':
     dependencies:
       '@jridgewell/trace-mapping': 0.3.31
@@ -4145,6 +4231,16 @@ snapshots:
       '@types/yargs': 17.0.35
       chalk: 4.1.2
 
+  '@jest/types@30.2.0':
+    dependencies:
+      '@jest/pattern': 30.0.1
+      '@jest/schemas': 30.0.5
+      '@types/istanbul-lib-coverage': 2.0.6
+      '@types/istanbul-reports': 3.0.4
+      '@types/node': 22.19.5
+      '@types/yargs': 17.0.35
+      chalk: 4.1.2
+
   '@jridgewell/gen-mapping@0.3.13':
     dependencies:
       '@jridgewell/sourcemap-codec': 1.5.5
@@ -4316,6 +4412,8 @@ snapshots:
 
   '@sinclair/typebox@0.27.8': {}
 
+  '@sinclair/typebox@0.34.48': {}
+
   '@sinonjs/commons@3.0.1':
     dependencies:
       type-detect: 4.0.8
@@ -4721,6 +4819,11 @@ snapshots:
     dependencies:
       '@types/istanbul-lib-report': 3.0.3
 
+  '@types/jest@30.0.0':
+    dependencies:
+      expect: 30.2.0
+      pretty-format: 30.2.0
+
   '@types/json-schema@7.0.15': {}
 
   '@types/jsonwebtoken@9.0.10':
@@ -5116,6 +5219,8 @@ snapshots:
 
   ci-info@3.9.0: {}
 
+  ci-info@4.4.0: {}
+
   cjs-module-lexer@1.4.3: {}
 
   cliui@8.0.1:
@@ -5398,6 +5503,15 @@ snapshots:
       jest-message-util: 29.7.0
       jest-util: 29.7.0
 
+  expect@30.2.0:
+    dependencies:
+      '@jest/expect-utils': 30.2.0
+      '@jest/get-type': 30.1.0
+      jest-matcher-utils: 30.2.0
+      jest-message-util: 30.2.0
+      jest-mock: 30.2.0
+      jest-util: 30.2.0
+
   express-rate-limit@7.5.1(express@4.22.1):
     dependencies:
       express: 4.22.1
@@ -5872,6 +5986,13 @@ snapshots:
       jest-get-type: 29.6.3
       pretty-format: 29.7.0
 
+  jest-diff@30.2.0:
+    dependencies:
+      '@jest/diff-sequences': 30.0.1
+      '@jest/get-type': 30.1.0
+      chalk: 4.1.2
+      pretty-format: 30.2.0
+
   jest-docblock@29.7.0:
     dependencies:
       detect-newline: 3.1.0
@@ -5923,6 +6044,13 @@ snapshots:
       jest-get-type: 29.6.3
       pretty-format: 29.7.0
 
+  jest-matcher-utils@30.2.0:
+    dependencies:
+      '@jest/get-type': 30.1.0
+      chalk: 4.1.2
+      jest-diff: 30.2.0
+      pretty-format: 30.2.0
+
   jest-message-util@29.7.0:
     dependencies:
       '@babel/code-frame': 7.27.1
@@ -5935,18 +6063,38 @@ snapshots:
       slash: 3.0.0
       stack-utils: 2.0.6
 
+  jest-message-util@30.2.0:
+    dependencies:
+      '@babel/code-frame': 7.27.1
+      '@jest/types': 30.2.0
+      '@types/stack-utils': 2.0.3
+      chalk: 4.1.2
+      graceful-fs: 4.2.11
+      micromatch: 4.0.8
+      pretty-format: 30.2.0
+      slash: 3.0.0
+      stack-utils: 2.0.6
+
   jest-mock@29.7.0:
     dependencies:
       '@jest/types': 29.6.3
       '@types/node': 22.19.5
       jest-util: 29.7.0
 
+  jest-mock@30.2.0:
+    dependencies:
+      '@jest/types': 30.2.0
+      '@types/node': 22.19.5
+      jest-util: 30.2.0
+
   jest-pnp-resolver@1.2.3(jest-resolve@29.7.0):
     optionalDependencies:
       jest-resolve: 29.7.0
 
   jest-regex-util@29.6.3: {}
 
+  jest-regex-util@30.0.1: {}
+
   jest-resolve-dependencies@29.7.0:
     dependencies:
       jest-regex-util: 29.6.3
@@ -6053,6 +6201,15 @@ snapshots:
       graceful-fs: 4.2.11
       picomatch: 2.3.1
 
+  jest-util@30.2.0:
+    dependencies:
+      '@jest/types': 30.2.0
+      '@types/node': 22.19.5
+      chalk: 4.1.2
+      ci-info: 4.4.0
+      graceful-fs: 4.2.11
+      picomatch: 4.0.3
+
   jest-validate@29.7.0:
     dependencies:
       '@jest/types': 29.6.3
@@ -6444,6 +6601,12 @@ snapshots:
       ansi-styles: 5.2.0
       react-is: 18.3.1
 
+  pretty-format@30.2.0:
+    dependencies:
+      '@jest/schemas': 30.0.5
+      ansi-styles: 5.2.0
+      react-is: 18.3.1
+
   prisma@5.22.0:
     dependencies:
       '@prisma/engines': 5.22.0
@@ -6797,7 +6960,7 @@ snapshots:
 
   ts-deepmerge@7.0.3: {}
 
-  ts-jest@29.4.6(@babel/core@7.28.5)(@jest/transform@29.7.0)(@jest/types@29.6.3)(babel-jest@29.7.0(@babel/core@7.28.5))(jest-util@29.7.0)(jest@29.7.0(@types/node@22.19.5))(typescript@5.9.3):
+  ts-jest@29.4.6(@babel/core@7.28.5)(@jest/transform@29.7.0)(@jest/types@30.2.0)(babel-jest@29.7.0(@babel/core@7.28.5))(jest-util@30.2.0)(jest@29.7.0(@types/node@22.19.5))(typescript@5.9.3):
     dependencies:
       bs-logger: 0.2.6
       fast-json-stable-stringify: 2.1.0
@@ -6813,9 +6976,9 @@ snapshots:
     optionalDependencies:
       '@babel/core': 7.28.5
       '@jest/transform': 29.7.0
-      '@jest/types': 29.6.3
+      '@jest/types': 30.2.0
       babel-jest: 29.7.0(@babel/core@7.28.5)
-      jest-util: 29.7.0
+      jest-util: 30.2.0
 
   tsconfig-paths@4.2.0:
     dependencies:

Backend/src/controllers/AdminCourseApprovalController.ts

@@ -24,9 +24,7 @@ export class AdminCourseApprovalController {
     @Response('401', 'Unauthorized')
     @Response('403', 'Forbidden - Admin only')
     public async listPendingCourses(@Request() request: any): Promise<ListPendingCoursesResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await AdminCourseApprovalService.listPendingCourses(request.user.id);
-        if (!token) throw new ValidationError('No token provided');
-        return await AdminCourseApprovalService.listPendingCourses(token);
     }
 
     /**
@@ -41,9 +39,7 @@ export class AdminCourseApprovalController {
     @Response('403', 'Forbidden - Admin only')
     @Response('404', 'Course not found')
     public async getCourseDetail(@Request() request: any, @Path() courseId: number): Promise<GetCourseDetailForAdminResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await AdminCourseApprovalService.getCourseDetail(request.user.id, courseId);
-        if (!token) throw new ValidationError('No token provided');
-        return await AdminCourseApprovalService.getCourseDetail(token, courseId);
     }
 
     /**
@@ -62,10 +58,7 @@ export class AdminCourseApprovalController {
         @Request() request: any,
         @Path() courseId: number
     ): Promise<ApproveCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await AdminCourseApprovalService.approveCourse(request.user.id, courseId, undefined);
-        if (!token) throw new ValidationError('No token provided');
-
-        return await AdminCourseApprovalService.approveCourse(token, courseId, undefined);
     }
 
     /**
@@ -85,13 +78,10 @@ export class AdminCourseApprovalController {
         @Path() courseId: number,
         @Body() body: RejectCourseBody
     ): Promise<RejectCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         // Validate body
         const { error } = RejectCourseValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
-        return await AdminCourseApprovalService.rejectCourse(token, courseId, body.comment);
+        return await AdminCourseApprovalService.rejectCourse(request.user.id, courseId, body.comment);
     }
 }

Backend/src/controllers/AuditController.ts

@@ -40,11 +40,6 @@ export class AuditController {
         @Query() page?: number,
         @Query() limit?: number
     ): Promise<ListAuditLogsResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-
         return await auditService.getLogs({
             userId,
             action,
@@ -72,11 +67,6 @@ export class AuditController {
         @Request() request: any,
         @Path() logId: number
     ): Promise<AuditLogResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-
         const log = await auditService.getLogById(logId);
         if (!log) {
             throw new ValidationError('Audit log not found');
@@ -94,11 +84,6 @@ export class AuditController {
     @Response('401', 'Unauthorized')
     @Response('403', 'Forbidden - Admin only')
     public async getAuditStats(@Request() request: any): Promise<AuditLogStats> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-
         return await auditService.getStats();
     }
 
@@ -118,11 +103,6 @@ export class AuditController {
         @Path() entityType: string,
         @Path() entityId: number
     ): Promise<AuditLogResponse[]> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-
         return await auditService.getEntityHistory(entityType, entityId);
     }
 
@@ -142,11 +122,6 @@ export class AuditController {
         @Path() userId: number,
         @Query() limit?: number
     ): Promise<AuditLogResponse[]> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-
         return await auditService.getUserActivity(userId, limit || 50);
     }
 
@@ -164,11 +139,6 @@ export class AuditController {
         @Request() request: any,
         @Query() days: number = 90
     ): Promise<{ deleted: number; message: string }> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-
         if (days < 6) {
             throw new ValidationError('Cannot delete logs newer than 6 days');
         }

Backend/src/controllers/AuthController.ts

@@ -33,32 +33,6 @@ export class AuthController {
         data: {
             token: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...',
             refreshToken: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...',
-            user: {
-                id: 1,
-                username: 'admin',
-                email: 'admin@elearning.local',
-                email_verified_at: new Date('2024-01-01T00:00:00Z'),
-                updated_at: new Date('2024-01-01T00:00:00Z'),
-                created_at: new Date('2024-01-01T00:00:00Z'),
-                role: {
-                    code: 'ADMIN',
-                    name: {
-                        th: 'ผู้ดูแลระบบ',
-                        en: 'Administrator'
-                    }
-                },
-                profile: {
-                    prefix: {
-                        th: 'นาย',
-                        en: 'Mr.'
-                    },
-                    first_name: 'Admin',
-                    last_name: 'User',
-                    phone: null,
-                    avatar_url: null,
-                    birth_date: null
-                }
-            }
         }
     })
     public async login(@Body() body: LoginRequest): Promise<LoginResponse> {

Backend/src/controllers/CategoriesController.ts

@@ -27,13 +27,11 @@ export class CategoriesAdminController {
     @SuccessResponse('200', 'Category created successfully')
     @Response('401', 'Invalid or expired token')
     public async createCategory(@Request() request: any, @Body() body: createCategory): Promise<createCategoryResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '') || '';
-
         // Validate body
         const { error } = CreateCategoryValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
-        return await this.categoryService.createCategory(token, body);
+        return await this.categoryService.createCategory(request.user.id, body);
     }
 
     @Put('{id}')
@@ -41,13 +39,11 @@ export class CategoriesAdminController {
     @SuccessResponse('200', 'Category updated successfully')
     @Response('401', 'Invalid or expired token')
     public async updateCategory(@Request() request: any, @Body() body: updateCategory): Promise<updateCategoryResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '') || '';
-
         // Validate body
         const { error } = UpdateCategoryValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
-        return await this.categoryService.updateCategory(token, body.id, body);
+        return await this.categoryService.updateCategory(request.user.id, body.id, body);
     }
 
     @Delete('{id}')
@@ -55,7 +51,6 @@ export class CategoriesAdminController {
     @SuccessResponse('200', 'Category deleted successfully')
     @Response('401', 'Invalid or expired token')
     public async deleteCategory(@Request() request: any, @Path() id: number): Promise<deleteCategoryResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '') || '';
+        return await this.categoryService.deleteCategory(request.user.id, id);
-        return await this.categoryService.deleteCategory(token, id);
     }
 }

Backend/src/controllers/CertificateController.ts

@@ -1,5 +1,4 @@
 import { Get, Post, Route, Tags, SuccessResponse, Response, Security, Path, Request } from 'tsoa';
-import { ValidationError } from '../middleware/errorHandler';
 import { CertificateService } from '../services/certificate.service';
 import {
     GenerateCertificateResponse,
@@ -21,9 +20,7 @@ export class CertificateController {
     @SuccessResponse('200', 'Certificates retrieved successfully')
     @Response('401', 'Invalid or expired token')
     public async listMyCertificates(@Request() request: any): Promise<ListMyCertificatesResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.certificateService.listMyCertificates({ userId: request.user.id });
-        if (!token) throw new ValidationError('No token provided');
-        return await this.certificateService.listMyCertificates({ token });
     }
 
     /**
@@ -37,9 +34,7 @@ export class CertificateController {
     @Response('401', 'Invalid or expired token')
     @Response('404', 'Certificate not found')
     public async getCertificate(@Request() request: any, @Path() courseId: number): Promise<GetCertificateResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.certificateService.getCertificate({ userId: request.user.id, course_id: courseId });
-        if (!token) throw new ValidationError('No token provided');
-        return await this.certificateService.getCertificate({ token, course_id: courseId });
     }
 
     /**
@@ -54,8 +49,6 @@ export class CertificateController {
     @Response('401', 'Invalid or expired token')
     @Response('404', 'Enrollment not found')
     public async generateCertificate(@Request() request: any, @Path() courseId: number): Promise<GenerateCertificateResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.certificateService.generateCertificate({ userId: request.user.id, course_id: courseId });
-        if (!token) throw new ValidationError('No token provided');
-        return await this.certificateService.generateCertificate({ token, course_id: courseId });
     }
 }

Backend/src/controllers/ChaptersLessonInstructorController.ts

@@ -65,14 +65,11 @@ export class ChaptersLessonInstructorController {
         @Path() courseId: number,
         @Body() body: CreateChapterBody
     ): Promise<CreateChapterResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = CreateChapterValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await chaptersLessonService.createChapter({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             title: body.title,
             description: body.description,
@@ -96,14 +93,11 @@ export class ChaptersLessonInstructorController {
         @Path() chapterId: number,
         @Body() body: UpdateChapterBody
     ): Promise<UpdateChapterResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = UpdateChapterValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await chaptersLessonService.updateChapter({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             chapter_id: chapterId,
             ...body,
@@ -125,9 +119,7 @@ export class ChaptersLessonInstructorController {
         @Path() courseId: number,
         @Path() chapterId: number
     ): Promise<DeleteChapterResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await chaptersLessonService.deleteChapter({ userId: request.user.id, course_id: courseId, chapter_id: chapterId });
-        if (!token) throw new ValidationError('No token provided');
-        return await chaptersLessonService.deleteChapter({ token, course_id: courseId, chapter_id: chapterId });
     }
 
     /**
@@ -143,14 +135,11 @@ export class ChaptersLessonInstructorController {
         @Path() chapterId: number,
         @Body() body: ReorderChapterBody
     ): Promise<ReorderChapterResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = ReorderChapterValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await chaptersLessonService.reorderChapter({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             chapter_id: chapterId,
             sort_order: body.sort_order,
@@ -174,9 +163,7 @@ export class ChaptersLessonInstructorController {
         @Path() chapterId: number,
         @Path() lessonId: number
     ): Promise<GetLessonResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await chaptersLessonService.getLesson({ userId: request.user.id, course_id: courseId, chapter_id: chapterId, lesson_id: lessonId });
-        if (!token) throw new ValidationError('No token provided');
-        return await chaptersLessonService.getLesson({ token, course_id: courseId, chapter_id: chapterId, lesson_id: lessonId });
     }
 
     /**
@@ -192,14 +179,11 @@ export class ChaptersLessonInstructorController {
         @Path() chapterId: number,
         @Body() body: CreateLessonBody
     ): Promise<CreateLessonResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = CreateLessonValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await chaptersLessonService.createLesson({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             chapter_id: chapterId,
             title: body.title,
@@ -223,14 +207,11 @@ export class ChaptersLessonInstructorController {
         @Path() lessonId: number,
         @Body() body: UpdateLessonBody
     ): Promise<UpdateLessonResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = UpdateLessonValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await chaptersLessonService.updateLesson({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             chapter_id: chapterId,
             lesson_id: lessonId,
@@ -258,9 +239,7 @@ export class ChaptersLessonInstructorController {
         @Path() chapterId: number,
         @Path() lessonId: number
     ): Promise<DeleteLessonResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await chaptersLessonService.deleteLesson({ userId: request.user.id, course_id: courseId, chapter_id: chapterId, lesson_id: lessonId });
-        if (!token) throw new ValidationError('No token provided');
-        return await chaptersLessonService.deleteLesson({ token, course_id: courseId, chapter_id: chapterId, lesson_id: lessonId });
     }
 
     /**
@@ -276,14 +255,11 @@ export class ChaptersLessonInstructorController {
         @Path() chapterId: number,
         @Body() body: ReorderLessonsBody
     ): Promise<ReorderLessonsResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = ReorderLessonsValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await chaptersLessonService.reorderLessons({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             chapter_id: chapterId,
             lesson_id: body.lesson_id,
@@ -309,14 +285,11 @@ export class ChaptersLessonInstructorController {
         @Path() lessonId: number,
         @Body() body: AddQuestionBody
     ): Promise<AddQuestionResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = AddQuestionValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await chaptersLessonService.addQuestion({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             ...body,
@@ -338,14 +311,11 @@ export class ChaptersLessonInstructorController {
         @Path() questionId: number,
         @Body() body: UpdateQuestionBody
     ): Promise<UpdateQuestionResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = UpdateQuestionValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await chaptersLessonService.updateQuestion({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             question_id: questionId,
@@ -364,14 +334,11 @@ export class ChaptersLessonInstructorController {
         @Path() questionId: number,
         @Body() body: ReorderQuestionBody
     ): Promise<ReorderQuestionResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = ReorderQuestionValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await chaptersLessonService.reorderQuestion({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             question_id: questionId,
@@ -393,10 +360,8 @@ export class ChaptersLessonInstructorController {
         @Path() lessonId: number,
         @Path() questionId: number
     ): Promise<DeleteQuestionResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
         return await chaptersLessonService.deleteQuestion({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             question_id: questionId,
@@ -417,14 +382,11 @@ export class ChaptersLessonInstructorController {
         @Path() lessonId: number,
         @Body() body: UpdateQuizBody
     ): Promise<UpdateQuizResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = UpdateQuizValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await chaptersLessonService.updateQuiz({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             ...body,

Backend/src/controllers/CoursesInstructorController.ts

@@ -22,12 +22,10 @@ import {
     GetCourseApprovalHistoryResponse,
     setCourseDraftResponse,
     CloneCourseResponse,
+    GetAllMyStudentsResponse,
 } from '../types/CoursesInstructor.types';
 import { CreateCourseValidator, UpdateCourseValidator, CloneCourseValidator } from "../validators/CoursesInstructor.validator";
 
-import jwt from 'jsonwebtoken';
-import { config } from '../config';
-
 @Route('api/instructors/courses')
 @Tags('CoursesInstructor')
 export class CoursesInstructorController {
@@ -45,11 +43,7 @@ export class CoursesInstructorController {
         @Request() request: any,
         @Query() status?: 'DRAFT' | 'PENDING' | 'APPROVED' | 'REJECTED' | 'ARCHIVED'
     ): Promise<ListMyCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.listMyCourses({ userId: request.user.id, status });
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await CoursesInstructorService.listMyCourses({ token, status });
     }
 
     /**
@@ -67,9 +61,23 @@ export class CoursesInstructorController {
         @Path() courseId: number,
         @Query() query: string
     ): Promise<SearchInstructorResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.searchInstructors({ userId: request.user.id, query, course_id: courseId });
-        if (!token) throw new ValidationError('No token provided');
+    }
-        return await CoursesInstructorService.searchInstructors({ token, query, course_id: courseId });
+
+    /**
+     * ดึงผู้เรียนทั้งหมดของ instructor ทุกคอร์ส
+     * Get all students enrolled in all of instructor's courses
+     *
+     * @returns รายการผู้เรียนแยกตามคอร์ส พร้อม total_enrolled และ total_completed ต่อคอร์ส
+     */
+    @Get('my-students')
+    @Security('jwt', ['instructor'])
+    @SuccessResponse('200', 'Students retrieved successfully')
+    @Response('401', 'Unauthorized')
+    public async getMyAllStudents(
+        @Request() request: any
+    ): Promise<GetAllMyStudentsResponse> {
+        return await CoursesInstructorService.getMyAllStudents(request.user.id);
     }
 
     /**
@@ -83,11 +91,7 @@ export class CoursesInstructorController {
     @Response('401', 'Invalid or expired token')
     @Response('404', 'Course not found')
     public async getMyCourse(@Request() request: any, @Path() courseId: number): Promise<GetMyCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.getmyCourse({ userId: request.user.id, course_id: courseId });
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await CoursesInstructorService.getmyCourse({ token, course_id: courseId });
     }
 
     /**
@@ -101,13 +105,10 @@ export class CoursesInstructorController {
     @Response('401', 'Invalid or expired token')
     @Response('404', 'Course not found')
     public async updateCourse(@Request() request: any, @Path() courseId: number, @Body() body: UpdateMyCourse): Promise<UpdateMyCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = UpdateCourseValidator.validate(body.data);
         if (error) throw new ValidationError(error.details[0].message);
 
-        return await CoursesInstructorService.updateCourse(token, courseId, body.data);
+        return await CoursesInstructorService.updateCourse(request.user.id, courseId, body.data);
     }
 
     /**
@@ -126,10 +127,6 @@ export class CoursesInstructorController {
         @FormField() data: string,
         @UploadedFile() thumbnail?: Express.Multer.File
     ): Promise<createCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
-        const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
         const parsed = JSON.parse(data);
         const { error, value } = CreateCourseValidator.validate(parsed);
         if (error) throw new ValidationError(error.details[0].message);
@@ -137,7 +134,7 @@ export class CoursesInstructorController {
         // Validate thumbnail file type if provided
         if (thumbnail && !thumbnail.mimetype?.startsWith('image/')) throw new ValidationError('Only image files are allowed for thumbnail');
 
-        return await CoursesInstructorService.createCourse(value, decoded.id, thumbnail);
+        return await CoursesInstructorService.createCourse(value, request.user.id, thumbnail);
     }
 
     /**
@@ -156,11 +153,9 @@ export class CoursesInstructorController {
         @Path() courseId: number,
         @UploadedFile() file: Express.Multer.File
     ): Promise<{ code: number; message: string; data: { course_id: number; thumbnail_url: string } }> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
         if (!file.mimetype?.startsWith('image/')) throw new ValidationError('Only image files are allowed');
 
-        return await CoursesInstructorService.uploadThumbnail(token, courseId, file);
+        return await CoursesInstructorService.uploadThumbnail(request.user.id, courseId, file);
     }
 
     /**
@@ -174,9 +169,7 @@ export class CoursesInstructorController {
     @Response('401', 'Invalid or expired token')
     @Response('404', 'Course not found')
     public async deleteCourse(@Request() request: any, @Path() courseId: number): Promise<DeleteMyCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.deleteCourse(request.user.id, courseId);
-        if (!token) throw new ValidationError('No token provided')
-        return await CoursesInstructorService.deleteCourse(token, courseId);
     }
 
     /**
@@ -196,14 +189,11 @@ export class CoursesInstructorController {
         @Path() courseId: number,
         @Body() body: { title: { th: string; en: string } }
     ): Promise<CloneCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         const { error } = CloneCourseValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         const result = await CoursesInstructorService.cloneCourse({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             title: body.title
         });
@@ -220,9 +210,7 @@ export class CoursesInstructorController {
     @Response('401', 'Invalid or expired token')
     @Response('404', 'Course not found')
     public async submitCourse(@Request() request: any, @Path() courseId: number): Promise<submitCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.sendCourseForReview({ userId: request.user.id, course_id: courseId });
-        if (!token) throw new ValidationError('No token provided')
-        return await CoursesInstructorService.sendCourseForReview({ token, course_id: courseId });
     }
 
     /**
@@ -236,9 +224,7 @@ export class CoursesInstructorController {
     @Response('401', 'Invalid or expired token')
     @Response('404', 'Course not found')
     public async setCourseDraft(@Request() request: any, @Path() courseId: number): Promise<setCourseDraftResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.setCourseDraft({ userId: request.user.id, course_id: courseId });
-        if (!token) throw new ValidationError('No token provided')
-        return await CoursesInstructorService.setCourseDraft({ token, course_id: courseId });
     }
 
     /**
@@ -253,9 +239,7 @@ export class CoursesInstructorController {
     @Response('403', 'You are not an instructor of this course')
     @Response('404', 'Course not found')
     public async getCourseApprovals(@Request() request: any, @Path() courseId: number): Promise<GetCourseApprovalsResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.getCourseApprovals(request.user.id, courseId);
-        if (!token) throw new ValidationError('No token provided')
-        return await CoursesInstructorService.getCourseApprovals(token, courseId);
     }
 
     /**
@@ -269,9 +253,7 @@ export class CoursesInstructorController {
     @Response('401', 'Invalid or expired token')
     @Response('404', 'Instructors not found')
     public async listInstructorCourses(@Request() request: any, @Path() courseId: number): Promise<listinstructorCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.listInstructorsOfCourse({ userId: request.user.id, course_id: courseId });
-        if (!token) throw new ValidationError('No token provided')
-        return await CoursesInstructorService.listInstructorsOfCourse({ token, course_id: courseId });
     }
 
     /**
@@ -286,9 +268,7 @@ export class CoursesInstructorController {
     @Response('401', 'Invalid or expired token')
     @Response('404', 'Instructor not found')
     public async addInstructor(@Request() request: any, @Path() courseId: number, @Path() emailOrUsername: string): Promise<addinstructorCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.addInstructorToCourse({ userId: request.user.id, course_id: courseId, email_or_username: emailOrUsername });
-        if (!token) throw new ValidationError('No token provided')
-        return await CoursesInstructorService.addInstructorToCourse({ token, course_id: courseId, email_or_username: emailOrUsername });
     }
 
     /**
@@ -303,9 +283,7 @@ export class CoursesInstructorController {
     @Response('401', 'Invalid or expired token')
     @Response('404', 'Instructor not found')
     public async removeInstructor(@Request() request: any, @Path() courseId: number, @Path() userId: number): Promise<removeinstructorCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.removeInstructorFromCourse({ userId: request.user.id, course_id: courseId, user_id: userId });
-        if (!token) throw new ValidationError('No token provided')
-        return await CoursesInstructorService.removeInstructorFromCourse({ token, course_id: courseId, user_id: userId });
     }
 
     /**
@@ -320,9 +298,7 @@ export class CoursesInstructorController {
     @Response('401', 'Invalid or expired token')
     @Response('404', 'Primary instructor not found')
     public async setPrimaryInstructor(@Request() request: any, @Path() courseId: number, @Path() userId: number): Promise<setprimaryCourseInstructorResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.setPrimaryInstructor({ userId: request.user.id, course_id: courseId, user_id: userId });
-        if (!token) throw new ValidationError('No token provided')
-        return await CoursesInstructorService.setPrimaryInstructor({ token, course_id: courseId, user_id: userId });
     }
 
     /**
@@ -347,10 +323,8 @@ export class CoursesInstructorController {
         @Query() search?: string,
         @Query() status?: 'ENROLLED' | 'COMPLETED'
     ): Promise<GetEnrolledStudentsResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
         return await CoursesInstructorService.getEnrolledStudents({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             page,
             limit,
@@ -376,10 +350,8 @@ export class CoursesInstructorController {
         @Path() courseId: number,
         @Path() studentId: number
     ): Promise<GetEnrolledStudentDetailResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
         return await CoursesInstructorService.getEnrolledStudentDetail({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             student_id: studentId,
         });
@@ -410,10 +382,8 @@ export class CoursesInstructorController {
         @Query() search?: string,
         @Query() isPassed?: boolean
     ): Promise<GetQuizScoresResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
         return await CoursesInstructorService.getQuizScores({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             page,
@@ -442,10 +412,8 @@ export class CoursesInstructorController {
         @Path() lessonId: number,
         @Path() studentId: number
     ): Promise<GetQuizAttemptDetailResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
         return await CoursesInstructorService.getQuizAttemptDetail({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             student_id: studentId,
@@ -467,8 +435,6 @@ export class CoursesInstructorController {
         @Request() request: any,
         @Path() courseId: number
     ): Promise<GetCourseApprovalHistoryResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await CoursesInstructorService.getCourseApprovalHistory(request.user.id, courseId);
-        if (!token) throw new ValidationError('No token provided');
-        return await CoursesInstructorService.getCourseApprovalHistory(token, courseId);
     }
 }

Backend/src/controllers/CoursesStudentController.ts

@@ -36,11 +36,7 @@ export class CoursesStudentController {
     @Response('404', 'Course not found')
     @Response('409', 'Already enrolled in this course')
     public async enrollCourse(@Request() request: any, @Path() courseId: number): Promise<EnrollCourseResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.service.enrollCourse({ userId: request.user.id, course_id: courseId });
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await this.service.enrollCourse({ token, course_id: courseId });
     }
 
     /**
@@ -60,11 +56,7 @@ export class CoursesStudentController {
         @Query() limit?: number,
         @Query() status?: EnrollmentStatus
     ): Promise<ListEnrolledCoursesResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.service.GetEnrolledCourses({ userId: request.user.id, page, limit, status });
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await this.service.GetEnrolledCourses({ token, page, limit, status });
     }
 
     /**
@@ -79,11 +71,7 @@ export class CoursesStudentController {
     @Response('403', 'Not enrolled in this course')
     @Response('404', 'Course not found')
     public async getCourseLearning(@Request() request: any, @Path() courseId: number): Promise<GetCourseLearningResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.service.getCourseLearning({ userId: request.user.id, course_id: courseId });
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await this.service.getCourseLearning({ token, course_id: courseId });
     }
 
     /**
@@ -103,11 +91,7 @@ export class CoursesStudentController {
         @Path() courseId: number,
         @Path() lessonId: number
     ): Promise<GetLessonContentResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.service.getlessonContent({ userId: request.user.id, course_id: courseId, lesson_id: lessonId });
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await this.service.getlessonContent({ token, course_id: courseId, lesson_id: lessonId });
     }
 
     /**
@@ -126,11 +110,7 @@ export class CoursesStudentController {
         @Path() courseId: number,
         @Path() lessonId: number
     ): Promise<CheckLessonAccessResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.service.checkAccessLesson({ userId: request.user.id, course_id: courseId, lesson_id: lessonId });
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await this.service.checkAccessLesson({ token, course_id: courseId, lesson_id: lessonId });
     }
 
     /**
@@ -149,14 +129,12 @@ export class CoursesStudentController {
         @Path() lessonId: number,
         @Body() body: SaveVideoProgressBody
     ): Promise<SaveVideoProgressResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
 
         const { error } = SaveVideoProgressValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await this.service.saveVideoProgress({
-            token,
+            userId: request.user.id,
             lesson_id: lessonId,
             video_progress_seconds: body.video_progress_seconds,
             video_duration_seconds: body.video_duration_seconds,
@@ -178,11 +156,7 @@ export class CoursesStudentController {
         @Request() request: any,
         @Path() lessonId: number
     ): Promise<GetVideoProgressResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.service.getVideoProgress({ userId: request.user.id, lesson_id: lessonId });
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await this.service.getVideoProgress({ token, lesson_id: lessonId });
     }
 
     /**
@@ -202,11 +176,7 @@ export class CoursesStudentController {
         @Path() courseId: number,
         @Path() lessonId: number
     ): Promise<CompleteLessonResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.service.completeLesson({ userId: request.user.id, lesson_id: lessonId });
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await this.service.completeLesson({ token, lesson_id: lessonId });
     }
 
     /**
@@ -227,14 +197,12 @@ export class CoursesStudentController {
         @Path() lessonId: number,
         @Body() body: SubmitQuizBody
     ): Promise<SubmitQuizResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
 
         const { error } = SubmitQuizValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await this.service.submitQuiz({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             answers: body.answers,
@@ -258,12 +226,8 @@ export class CoursesStudentController {
         @Path() courseId: number,
         @Path() lessonId: number
     ): Promise<GetQuizAttemptsResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
         return await this.service.getQuizAttempts({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
         });

Backend/src/controllers/LessonsController.ts

@@ -42,8 +42,6 @@ export class LessonsController {
         @Path() lessonId: number,
         @UploadedFile() video: Express.Multer.File
     ): Promise<VideoOperationResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
 
         if (!video) {
             throw new ValidationError('Video file is required');
@@ -57,7 +55,7 @@ export class LessonsController {
         };
 
         return await chaptersLessonService.uploadVideo({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             video: videoInfo,
@@ -87,8 +85,6 @@ export class LessonsController {
         @Path() lessonId: number,
         @UploadedFile() video: Express.Multer.File
     ): Promise<VideoOperationResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
 
         if (!video) {
             throw new ValidationError('Video file is required');
@@ -102,7 +98,7 @@ export class LessonsController {
         };
 
         return await chaptersLessonService.updateVideo({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             video: videoInfo,
@@ -132,8 +128,6 @@ export class LessonsController {
         @Path() lessonId: number,
         @UploadedFile() attachment: Express.Multer.File
     ): Promise<AttachmentOperationResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
 
         if (!attachment) {
             throw new ValidationError('Attachment file is required');
@@ -147,7 +141,7 @@ export class LessonsController {
         };
 
         return await chaptersLessonService.uploadAttachment({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             attachment: attachmentInfo,
@@ -177,11 +171,9 @@ export class LessonsController {
         @Path() lessonId: number,
         @Path() attachmentId: number
     ): Promise<DeleteAttachmentResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
 
         return await chaptersLessonService.deleteAttachment({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             attachment_id: attachmentId,
@@ -211,14 +203,12 @@ export class LessonsController {
         @Path() lessonId: number,
         @Body() body: SetYouTubeVideoBody
     ): Promise<YouTubeVideoResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
 
         const { error } = SetYouTubeVideoValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await chaptersLessonService.setYouTubeVideo({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             lesson_id: lessonId,
             youtube_video_id: body.youtube_video_id,

Backend/src/controllers/RecommendedCoursesController.ts

@@ -1,5 +1,4 @@
 import { Get, Path, Put, Query, Request, Response, Route, Security, SuccessResponse, Tags } from 'tsoa';
-import { ValidationError } from '../middleware/errorHandler';
 import { RecommendedCoursesService } from '../services/RecommendedCourses.service';
 import {
     ListApprovedCoursesResponse,
@@ -25,9 +24,7 @@ export class RecommendedCoursesController {
         @Query() search?: string,
         @Query() categoryId?: number
     ): Promise<ListApprovedCoursesResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await RecommendedCoursesService.listApprovedCourses(request.user.id, { search, categoryId });
-        if (!token) throw new ValidationError('No token provided');
-        return await RecommendedCoursesService.listApprovedCourses(token, { search, categoryId });
     }
 
     /**
@@ -43,9 +40,7 @@ export class RecommendedCoursesController {
     @Response('403', 'Forbidden - Admin only')
     @Response('404', 'Course not found')
     public async getCourseById(@Request() request: any, @Path() courseId: number): Promise<GetCourseByIdResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await RecommendedCoursesService.getCourseById(request.user.id, courseId);
-        if (!token) throw new ValidationError('No token provided');
-        return await RecommendedCoursesService.getCourseById(token, courseId);
     }
 
     /**
@@ -65,8 +60,6 @@ export class RecommendedCoursesController {
         @Path() courseId: number,
         @Query() is_recommended: boolean
     ): Promise<ToggleRecommendedResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await RecommendedCoursesService.toggleRecommended(request.user.id, courseId, is_recommended);
-        if (!token) throw new ValidationError('No token provided');
-        return await RecommendedCoursesService.toggleRecommended(token, courseId, is_recommended);
     }
 }

Backend/src/controllers/UserController.ts

@@ -1,12 +1,10 @@
-import { Get, Body, Post, Route, Tags, SuccessResponse, Response, Example, Controller, Security, Request, Put, UploadedFile } from 'tsoa';
+import { Get, Body, Post, Route, Tags, SuccessResponse, Response, Security, Request, Put, UploadedFile } from 'tsoa';
 import { ValidationError } from '../middleware/errorHandler';
 import { UserService } from '../services/user.service';
 import {
     UserResponse,
-    ProfileResponse,
     ProfileUpdate,
     ProfileUpdateResponse,
-    ChangePasswordRequest,
     ChangePasswordResponse,
     updateAvatarResponse,
     SendVerifyEmailResponse,
@@ -23,8 +21,6 @@ export class UserController {
 
     /**
      * Get current user profile
-     * @summary Retrieve authenticated user's profile information
-     * @param request Express request object with JWT token in Authorization header
      */
     @Get('me')
     @SuccessResponse('200', 'User found')
@@ -32,12 +28,7 @@ export class UserController {
     @Response('401', 'Invalid or expired token')
     @Security('jwt')
     public async getMe(@Request() request: any): Promise<UserResponse> {
-        // Extract token from Authorization header
+        return await this.userService.getUserProfile(request.user.id);
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await this.userService.getUserProfile(token);
     }
 
     @Put('me')
@@ -47,34 +38,20 @@ export class UserController {
     @Response('400', 'Validation error')
     public async updateProfile(@Request() request: any, @Body() body: ProfileUpdate): Promise<ProfileUpdateResponse> {
         const { error } = profileUpdateSchema.validate(body);
-        if (error) {
+        if (error) throw new ValidationError(error.details[0].message);
-            throw new ValidationError(error.details[0].message);
+        return await this.userService.updateProfile(request.user.id, body);
-        }
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await this.userService.updateProfile(token, body);
     }
 
     @Get('roles')
     @Security('jwt')
     @SuccessResponse('200', 'Roles retrieved successfully')
     @Response('401', 'Invalid or expired token')
-    public async getRoles(@Request() request: any): Promise<rolesResponse> {
+    public async getRoles(): Promise<rolesResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.userService.getRoles();
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-        return await this.userService.getRoles(token);
     }
 
     /**
      * Change password
-     * @summary Change user password using old password
-     * @param request Express request object with JWT token in Authorization header
-     * @param body Old password and new password
-     * @returns Success message
      */
     @Post('change-password')
     @Security('jwt')
@@ -83,22 +60,12 @@ export class UserController {
     @Response('400', 'Validation error')
     public async changePassword(@Request() request: any, @Body() body: ChangePassword): Promise<ChangePasswordResponse> {
         const { error } = changePasswordSchema.validate(body);
-        if (error) {
+        if (error) throw new ValidationError(error.details[0].message);
-            throw new ValidationError(error.details[0].message);
+        return await this.userService.changePassword(request.user.id, body.oldPassword, body.newPassword);
-        }
-
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) {
-            throw new ValidationError('No token provided');
-        }
-
-        return await this.userService.changePassword(token, body.oldPassword, body.newPassword);
     }
 
     /**
      * Upload user avatar picture
-     * @param request Express request object with JWT token in Authorization header
-     * @param file Avatar image file
      */
     @Post('upload-avatar')
     @Security('jwt')
@@ -109,9 +76,6 @@ export class UserController {
         @Request() request: any,
         @UploadedFile() file: Express.Multer.File
     ): Promise<updateAvatarResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         // Validate file type (images only)
         if (!file.mimetype?.startsWith('image/')) throw new ValidationError('Only image files are allowed');
 
@@ -119,13 +83,11 @@ export class UserController {
         const maxSize = 5 * 1024 * 1024; // 5MB
         if (file.size > maxSize) throw new ValidationError('File size must be less than 5MB');
 
-        return await this.userService.uploadAvatarPicture(token, file);
+        return await this.userService.uploadAvatarPicture(request.user.id, file);
     }
 
     /**
      * Send verification email to user
-     * @summary Send email verification link to authenticated user's email
-     * @param request Express request object with JWT token in Authorization header
      */
     @Post('send-verify-email')
     @Security('jwt')
@@ -133,9 +95,7 @@ export class UserController {
     @Response('401', 'Invalid or expired token')
     @Response('400', 'Email already verified')
     public async sendVerifyEmail(@Request() request: any): Promise<SendVerifyEmailResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
+        return await this.userService.sendVerifyEmail(request.user.id);
-        if (!token) throw new ValidationError('No token provided');
-        return await this.userService.sendVerifyEmail(token);
     }
 
     /**

Backend/src/controllers/announcementsController.ts

@@ -37,10 +37,8 @@ export class AnnouncementsController {
         @Query() page?: number,
         @Query() limit?: number
     ): Promise<ListAnnouncementResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
         return await announcementsService.listAnnouncement({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             page,
             limit,
@@ -63,9 +61,6 @@ export class AnnouncementsController {
         @FormField() data: string,
         @UploadedFiles() files?: Express.Multer.File[]
     ): Promise<CreateAnnouncementResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         // Parse JSON data field
         const parsed = JSON.parse(data) as CreateAnnouncementBody;
 
@@ -74,7 +69,7 @@ export class AnnouncementsController {
         if (error) throw new ValidationError(error.details[0].message);
 
         return await announcementsService.createAnnouncement({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             title: parsed.title,
             content: parsed.content,
@@ -103,15 +98,12 @@ export class AnnouncementsController {
         @Path() announcementId: number,
         @Body() body: UpdateAnnouncementBody
     ): Promise<UpdateAnnouncementResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
-
         // Validate body
         const { error } = UpdateAnnouncementValidator.validate(body);
         if (error) throw new ValidationError(error.details[0].message);
 
         return await announcementsService.updateAnnouncement({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             announcement_id: announcementId,
             title: body.title,
@@ -139,10 +131,8 @@ export class AnnouncementsController {
         @Path() courseId: number,
         @Path() announcementId: number
     ): Promise<DeleteAnnouncementResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
         return await announcementsService.deleteAnnouncement({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             announcement_id: announcementId,
         });
@@ -166,10 +156,8 @@ export class AnnouncementsController {
         @Path() announcementId: number,
         @UploadedFile() file: Express.Multer.File
     ): Promise<UploadAnnouncementAttachmentResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
         return await announcementsService.uploadAttachment({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             announcement_id: announcementId,
             file: file as any,
@@ -195,10 +183,8 @@ export class AnnouncementsController {
         @Path() announcementId: number,
         @Path() attachmentId: number
     ): Promise<DeleteAnnouncementAttachmentResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
         return await announcementsService.deleteAttachment({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             announcement_id: announcementId,
             attachment_id: attachmentId,
@@ -228,10 +214,8 @@ export class AnnouncementsStudentController {
         @Query() page?: number,
         @Query() limit?: number
     ): Promise<ListAnnouncementResponse> {
-        const token = request.headers.authorization?.replace('Bearer ', '');
-        if (!token) throw new ValidationError('No token provided');
         return await announcementsService.listAnnouncement({
-            token,
+            userId: request.user.id,
             course_id: courseId,
             page,
             limit,

Backend/src/services/AdminCourseApproval.service.ts

@@ -1,8 +1,6 @@
 import { prisma } from '../config/database';
-import { config } from '../config';
 import { logger } from '../config/logger';
-import { UnauthorizedError, ValidationError, ForbiddenError, NotFoundError } from '../middleware/errorHandler';
+import { ValidationError, NotFoundError } from '../middleware/errorHandler';
-import jwt from 'jsonwebtoken';
 import { getPresignedUrl } from '../config/minio';
 import {
     ListPendingCoursesResponse,
@@ -18,7 +16,7 @@ export class AdminCourseApprovalService {
     /**
      * Get all pending courses for admin review
      */
-    static async listPendingCourses(token: string): Promise<ListPendingCoursesResponse> {
+    static async listPendingCourses(userId: number): Promise<ListPendingCoursesResponse> {
         try {
             const courses = await prisma.course.findMany({
                 where: { status: 'PENDING' },
@@ -96,9 +94,8 @@ export class AdminCourseApprovalService {
             };
         } catch (error) {
             logger.error('Failed to list pending courses', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: 0,
@@ -113,7 +110,7 @@ export class AdminCourseApprovalService {
     /**
      * Get course details for admin review
      */
-    static async getCourseDetail(token: string, courseId: number): Promise<GetCourseDetailForAdminResponse> {
+    static async getCourseDetail(userId: number, courseId: number): Promise<GetCourseDetailForAdminResponse> {
         try {
             const course = await prisma.course.findUnique({
                 where: { id: courseId },
@@ -228,9 +225,8 @@ export class AdminCourseApprovalService {
             };
         } catch (error) {
             logger.error('Failed to get course detail', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: courseId,
@@ -245,9 +241,8 @@ export class AdminCourseApprovalService {
     /**
      * Approve a course
      */
-    static async approveCourse(token: string, courseId: number, comment?: string): Promise<ApproveCourseResponse> {
+    static async approveCourse(userId: number, courseId: number, comment?: string): Promise<ApproveCourseResponse> {
         try {
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
 
             const course = await prisma.course.findUnique({ where: { id: courseId } });
             if (!course) {
@@ -264,7 +259,7 @@ export class AdminCourseApprovalService {
                     where: { id: courseId },
                     data: {
                         status: 'APPROVED',
-                        approved_by: decoded.id,
+                        approved_by: userId,
                         approved_at: new Date()
                     }
                 }),
@@ -273,7 +268,7 @@ export class AdminCourseApprovalService {
                     data: {
                         course_id: courseId,
                         submitted_by: course.created_by,
-                        reviewed_by: decoded.id,
+                        reviewed_by: userId,
                         action: 'APPROVED',
                         previous_status: course.status,
                         new_status: 'APPROVED',
@@ -284,7 +279,7 @@ export class AdminCourseApprovalService {
 
             // Audit log - APPROVE_COURSE
             await auditService.logSync({
-                userId: decoded.id,
+                userId,
                 action: AuditAction.APPROVE_COURSE,
                 entityType: 'Course',
                 entityId: courseId,
@@ -299,9 +294,8 @@ export class AdminCourseApprovalService {
             };
         } catch (error) {
             logger.error('Failed to approve course', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: courseId,
@@ -317,9 +311,8 @@ export class AdminCourseApprovalService {
     /**
      * Reject a course
      */
-    static async rejectCourse(token: string, courseId: number, comment: string): Promise<RejectCourseResponse> {
+    static async rejectCourse(userId: number, courseId: number, comment: string): Promise<RejectCourseResponse> {
         try {
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
 
             const course = await prisma.course.findUnique({ where: { id: courseId } });
             if (!course) {
@@ -350,7 +343,7 @@ export class AdminCourseApprovalService {
                     data: {
                         course_id: courseId,
                         submitted_by: course.created_by,
-                        reviewed_by: decoded.id,
+                        reviewed_by: userId,
                         action: 'REJECTED',
                         previous_status: course.status,
                         new_status: 'REJECTED',
@@ -361,7 +354,7 @@ export class AdminCourseApprovalService {
 
             // Audit log - REJECT_COURSE
             await auditService.logSync({
-                userId: decoded.id,
+                userId,
                 action: AuditAction.REJECT_COURSE,
                 entityType: 'Course',
                 entityId: courseId,
@@ -376,9 +369,8 @@ export class AdminCourseApprovalService {
             };
         } catch (error) {
             logger.error('Failed to reject course', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: courseId,

Backend/src/services/ChaptersLesson.service.ts

@@ -59,14 +59,11 @@ import { AuditAction } from '@prisma/client';
  * ตรวจสอบสิทธิ์เข้าถึง Course (สำหรับทั้ง Instructor และ Student)
  * Returns: { hasAccess: boolean, role: 'INSTRUCTOR' | 'STUDENT' | null, userId: number }
  */
-async function validateCourseAccess(token: string, course_id: number): Promise<{
+async function validateCourseAccess(userId: number, course_id: number): Promise<{
     hasAccess: boolean;
     role: 'INSTRUCTOR' | 'STUDENT' | null;
     userId: number;
 }> {
-    const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
-    const userId = decodedToken.id;
-
     const user = await prisma.user.findUnique({ where: { id: userId } });
     if (!user) {
         throw new UnauthorizedError('Invalid token');
@@ -98,9 +95,8 @@ async function validateCourseAccess(token: string, course_id: number): Promise<{
 export class ChaptersLessonService {
     async listChapters(request: ChaptersRequest): Promise<ListChaptersResponse> {
         try {
-            const { token, course_id } = request;
+            const { userId, course_id } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
+            const user = await prisma.user.findUnique({ where: { id: userId } });
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
             if (!user) {
                 throw new UnauthorizedError('Invalid token');
             }
@@ -117,14 +113,13 @@ export class ChaptersLessonService {
 
     async createChapter(request: CreateChapterInput): Promise<CreateChapterResponse> {
         try {
-            const { token, course_id, title, description, sort_order } = request;
+            const { userId, course_id, title, description, sort_order } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) {
                 throw new UnauthorizedError('Invalid token');
             }
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) {
                 throw new ForbiddenError('You are not permitted to create chapter');
             }
@@ -132,7 +127,7 @@ export class ChaptersLessonService {
 
             // Audit log - CREATE Chapter
             auditService.log({
-                userId: decodedToken.id,
+                userId: userId,
                 action: AuditAction.CREATE,
                 entityType: 'Chapter',
                 entityId: chapter.id,
@@ -142,9 +137,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Chapter created successfully', data: chapter as ChapterData };
         } catch (error) {
             logger.error(`Error creating chapter: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Chapter',
                 entityId: 0,
@@ -159,14 +153,13 @@ export class ChaptersLessonService {
 
     async updateChapter(request: UpdateChapterInput): Promise<UpdateChapterResponse> {
         try {
-            const { token, course_id, chapter_id, title, description, sort_order } = request;
+            const { userId, course_id, chapter_id, title, description, sort_order } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) {
                 throw new UnauthorizedError('Invalid token');
             }
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) {
                 throw new ForbiddenError('You are not permitted to update chapter');
             }
@@ -174,9 +167,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Chapter updated successfully', data: chapter as ChapterData };
         } catch (error) {
             logger.error(`Error updating chapter: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Chapter',
                 entityId: request.chapter_id,
@@ -191,14 +183,13 @@ export class ChaptersLessonService {
 
     async deleteChapter(request: DeleteChapterRequest): Promise<DeleteChapterResponse> {
         try {
-            const { token, course_id, chapter_id } = request;
+            const { userId, course_id, chapter_id } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) {
                 throw new UnauthorizedError('Invalid token');
             }
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) {
                 throw new ForbiddenError('You are not permitted to delete chapter');
             }
@@ -206,7 +197,7 @@ export class ChaptersLessonService {
 
             // Audit log - DELETE Chapter
             auditService.log({
-                userId: decodedToken.id,
+                userId: userId,
                 action: AuditAction.DELETE,
                 entityType: 'Chapter',
                 entityId: chapter_id,
@@ -219,9 +210,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Chapter deleted successfully' };
         } catch (error) {
             logger.error(`Error deleting chapter: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Chapter',
                 entityId: request.chapter_id,
@@ -236,14 +226,13 @@ export class ChaptersLessonService {
 
     async reorderChapter(request: ReorderChapterRequest): Promise<ReorderChapterResponse> {
         try {
-            const { token, course_id, chapter_id, sort_order: newSortOrder } = request;
+            const { userId, course_id, chapter_id, sort_order: newSortOrder } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) {
                 throw new UnauthorizedError('Invalid token');
             }
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) {
                 throw new ForbiddenError('You are not permitted to reorder chapter');
             }
@@ -313,9 +302,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Chapter reordered successfully', data: chapters as ChapterData[] };
         } catch (error) {
             logger.error(`Error reordering chapter: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Chapter',
                 entityId: request.chapter_id,
@@ -335,14 +323,13 @@ export class ChaptersLessonService {
      */
     async createLesson(request: CreateLessonInput): Promise<CreateLessonResponse> {
         try {
-            const { token, course_id, chapter_id, title, content, type, sort_order } = request;
+            const { userId, course_id, chapter_id, title, content, type, sort_order } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) {
                 throw new UnauthorizedError('Invalid token');
             }
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) {
                 throw new ForbiddenError('You are not permitted to create lesson');
             }
@@ -354,7 +341,6 @@ export class ChaptersLessonService {
 
             // If QUIZ type, create empty Quiz shell
             if (type === 'QUIZ') {
-                const userId = decodedToken.id;
 
                 await prisma.quiz.create({
                     data: {
@@ -376,7 +362,7 @@ export class ChaptersLessonService {
 
                 // Audit log - CREATE Lesson (QUIZ)
                 auditService.log({
-                    userId: decodedToken.id,
+                    userId: userId,
                     action: AuditAction.CREATE,
                     entityType: 'Lesson',
                     entityId: lesson.id,
@@ -388,7 +374,7 @@ export class ChaptersLessonService {
 
             // Audit log - CREATE Lesson
             auditService.log({
-                userId: decodedToken.id,
+                userId: userId,
                 action: AuditAction.CREATE,
                 entityType: 'Lesson',
                 entityId: lesson.id,
@@ -398,9 +384,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Lesson created successfully', data: lesson as LessonData };
         } catch (error) {
             logger.error(`Error creating lesson: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Lesson',
                 entityId: 0,
@@ -419,10 +404,10 @@ export class ChaptersLessonService {
      */
     async getLesson(request: GetLessonRequest): Promise<GetLessonResponse> {
         try {
-            const { token, course_id, lesson_id } = request;
+            const { userId, course_id, lesson_id } = request;
 
             // Check access for both instructor and enrolled student
-            const access = await validateCourseAccess(token, course_id);
+            const access = await validateCourseAccess(userId, course_id);
             if (!access.hasAccess) {
                 throw new ForbiddenError('You do not have access to this course');
             }
@@ -549,9 +534,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Lesson fetched successfully', data: lessonData as LessonData };
         } catch (error) {
             logger.error(`Error fetching lesson: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Lesson',
                 entityId: request.lesson_id,
@@ -566,14 +550,13 @@ export class ChaptersLessonService {
 
     async updateLesson(request: UpdateLessonRequest): Promise<UpdateLessonResponse> {
         try {
-            const { token, course_id, lesson_id, data } = request;
+            const { userId, course_id, lesson_id, data } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) {
                 throw new UnauthorizedError('Invalid token');
             }
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) {
                 throw new ForbiddenError('You are not permitted to update lesson');
             }
@@ -581,9 +564,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Lesson updated successfully', data: lesson as LessonData };
         } catch (error) {
             logger.error(`Error updating lesson: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Lesson',
                 entityId: request.lesson_id,
@@ -602,14 +584,13 @@ export class ChaptersLessonService {
      */
     async reorderLessons(request: ReorderLessonsRequest): Promise<ReorderLessonsResponse> {
         try {
-            const { token, course_id, chapter_id, lesson_id, sort_order: newSortOrder } = request;
+            const { userId, course_id, chapter_id, lesson_id, sort_order: newSortOrder } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to reorder lessons');
 
             // Verify chapter exists and belongs to the course
@@ -682,9 +663,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Lessons reordered successfully', data: lessons as LessonData[] };
         } catch (error) {
             logger.error(`Error reordering lessons: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Lesson',
                 entityId: request.lesson_id,
@@ -704,14 +684,13 @@ export class ChaptersLessonService {
      */
     async deleteLesson(request: DeleteLessonRequest): Promise<DeleteLessonResponse> {
         try {
-            const { token, course_id, lesson_id } = request;
+            const { userId, course_id, lesson_id } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to delete this lesson');
 
             // Fetch lesson with all related data
@@ -751,7 +730,7 @@ export class ChaptersLessonService {
 
             // Audit log - DELETE Lesson
             auditService.log({
-                userId: decodedToken.id,
+                userId: userId,
                 action: AuditAction.DELETE,
                 entityType: 'Lesson',
                 entityId: lesson_id,
@@ -764,9 +743,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Lesson deleted successfully' };
         } catch (error) {
             logger.error(`Error deleting lesson: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Lesson',
                 entityId: request.lesson_id,
@@ -789,14 +767,13 @@ export class ChaptersLessonService {
      */
     async uploadVideo(request: UploadVideoInput): Promise<VideoOperationResponse> {
         try {
-            const { token, course_id, lesson_id, video } = request;
+            const { userId, course_id, lesson_id, video } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to modify this lesson');
 
             // Verify lesson exists and is VIDEO type
@@ -833,7 +810,7 @@ export class ChaptersLessonService {
 
             // Audit log - UPLOAD_FILE (Video)
             auditService.log({
-                userId: decodedToken.id,
+                userId: userId,
                 action: AuditAction.UPLOAD_FILE,
                 entityType: 'Lesson',
                 entityId: lesson_id,
@@ -853,9 +830,8 @@ export class ChaptersLessonService {
             };
         } catch (error) {
             logger.error(`Error uploading video: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Lesson',
                 entityId: request.lesson_id,
@@ -874,14 +850,13 @@ export class ChaptersLessonService {
      */
     async updateVideo(request: UpdateVideoInput): Promise<VideoOperationResponse> {
         try {
-            const { token, course_id, lesson_id, video } = request;
+            const { userId, course_id, lesson_id, video } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to modify this lesson');
 
             // Verify lesson exists and is VIDEO type
@@ -946,9 +921,8 @@ export class ChaptersLessonService {
             };
         } catch (error) {
             logger.error(`Error updating video: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Lesson',
                 entityId: request.lesson_id,
@@ -967,14 +941,13 @@ export class ChaptersLessonService {
      */
     async setYouTubeVideo(request: SetYouTubeVideoInput): Promise<YouTubeVideoResponse> {
         try {
-            const { token, course_id, lesson_id, youtube_video_id, video_title } = request;
+            const { userId, course_id, lesson_id, youtube_video_id, video_title } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to modify this lesson');
 
             // Verify lesson exists and is VIDEO type
@@ -1038,9 +1011,8 @@ export class ChaptersLessonService {
             };
         } catch (error) {
             logger.error(`Error setting YouTube video: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Lesson',
                 entityId: request.lesson_id,
@@ -1059,14 +1031,13 @@ export class ChaptersLessonService {
      */
     async uploadAttachment(request: UploadAttachmentInput): Promise<AttachmentOperationResponse> {
         try {
-            const { token, course_id, lesson_id, attachment } = request;
+            const { userId, course_id, lesson_id, attachment } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to modify this lesson');
 
             // Verify lesson exists
@@ -1101,7 +1072,7 @@ export class ChaptersLessonService {
 
             // Audit log - UPLOAD_FILE (Attachment)
             auditService.log({
-                userId: decodedToken.id,
+                userId: userId,
                 action: AuditAction.UPLOAD_FILE,
                 entityType: 'LessonAttachment',
                 entityId: newAttachment.id,
@@ -1125,9 +1096,8 @@ export class ChaptersLessonService {
             };
         } catch (error) {
             logger.error(`Error uploading attachment: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'LessonAttachment',
                 entityId: request.lesson_id,
@@ -1146,14 +1116,13 @@ export class ChaptersLessonService {
      */
     async deleteAttachment(request: DeleteAttachmentInput): Promise<DeleteAttachmentResponse> {
         try {
-            const { token, course_id, lesson_id, attachment_id } = request;
+            const { userId, course_id, lesson_id, attachment_id } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to modify this lesson');
 
             // Verify lesson exists
@@ -1184,7 +1153,7 @@ export class ChaptersLessonService {
 
             // Audit log - DELETE_FILE (Attachment)
             auditService.log({
-                userId: decodedToken.id,
+                userId: userId,
                 action: AuditAction.DELETE_FILE,
                 entityType: 'LessonAttachment',
                 entityId: attachment_id,
@@ -1194,9 +1163,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Attachment deleted successfully' };
         } catch (error) {
             logger.error(`Error deleting attachment: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'LessonAttachment',
                 entityId: request.attachment_id,
@@ -1216,14 +1184,13 @@ export class ChaptersLessonService {
      */
     async addQuestion(request: AddQuestionInput): Promise<AddQuestionResponse> {
         try {
-            const { token, course_id, lesson_id, question, explanation, question_type, sort_order, choices } = request;
+            const { userId, course_id, lesson_id, question, explanation, question_type, sort_order, choices } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to modify this lesson');
 
             // Verify lesson exists and is QUIZ type
@@ -1281,9 +1248,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Question added successfully', data: completeQuestion as QuizQuestionData };
         } catch (error) {
             logger.error(`Error adding question: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Question',
                 entityId: 0,
@@ -1303,14 +1269,13 @@ export class ChaptersLessonService {
      */
     async updateQuestion(request: UpdateQuestionInput): Promise<UpdateQuestionResponse> {
         try {
-            const { token, course_id, lesson_id, question_id, question, explanation, question_type, sort_order, choices } = request;
+            const { userId, course_id, lesson_id, question_id, question, explanation, question_type, sort_order, choices } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to modify this lesson');
 
             // Verify lesson exists and is QUIZ type
@@ -1367,9 +1332,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Question updated successfully', data: completeQuestion as QuizQuestionData };
         } catch (error) {
             logger.error(`Error updating question: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Question',
                 entityId: request.question_id,
@@ -1384,14 +1348,13 @@ export class ChaptersLessonService {
 
     async reorderQuestion(request: ReorderQuestionInput): Promise<ReorderQuestionResponse> {
         try {
-            const { token, course_id, lesson_id, question_id, sort_order } = request;
+            const { userId, course_id, lesson_id, question_id, sort_order } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to modify this lesson');
 
             // Verify lesson exists and is QUIZ type
@@ -1471,9 +1434,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Question reordered successfully', data: questions as QuizQuestionData[] };
         } catch (error) {
             logger.error(`Error reordering question: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Question',
                 entityId: request.question_id,
@@ -1493,14 +1455,13 @@ export class ChaptersLessonService {
      */
     async deleteQuestion(request: DeleteQuestionInput): Promise<DeleteQuestionResponse> {
         try {
-            const { token, course_id, lesson_id, question_id } = request;
+            const { userId, course_id, lesson_id, question_id } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to modify this lesson');
 
             // Verify lesson exists and is QUIZ type
@@ -1530,9 +1491,8 @@ export class ChaptersLessonService {
             return { code: 200, message: 'Question deleted successfully' };
         } catch (error) {
             logger.error(`Error deleting question: ${error}`);
-            const decodedToken = jwt.decode(request.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decodedToken?.id || 0,
+                userId: request.userId || 0,
                 action: AuditAction.ERROR,
                 entityType: 'Question',
                 entityId: request.question_id,
@@ -1680,14 +1640,13 @@ export class ChaptersLessonService {
      */
     async updateQuiz(request: UpdateQuizInput): Promise<UpdateQuizResponse> {
         try {
-            const { token, course_id, lesson_id, title, description, passing_score, time_limit, shuffle_questions, shuffle_choices, show_answers_after_completion, is_skippable, allow_multiple_attempts } = request;
+            const { userId, course_id, lesson_id, title, description, passing_score, time_limit, shuffle_questions, shuffle_choices, show_answers_after_completion, is_skippable, allow_multiple_attempts } = request;
-            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
             await CoursesInstructorService.validateCourseStatus(course_id);
 
-            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            const user = await prisma.user.findUnique({ where: { id: userId } });
             if (!user) throw new UnauthorizedError('Invalid token');
 
-            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            const courseInstructor = await CoursesInstructorService.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) throw new ForbiddenError('You are not permitted to modify this lesson');
 
             // Verify lesson exists and is QUIZ type

Backend/src/services/CoursesInstructor.service.ts

@@ -1,9 +1,7 @@
 import { prisma } from '../config/database';
 import { Prisma } from '@prisma/client';
-import { config } from '../config';
 import { logger } from '../config/logger';
-import { UnauthorizedError, ValidationError, ForbiddenError, NotFoundError } from '../middleware/errorHandler';
+import { ValidationError, ForbiddenError, NotFoundError } from '../middleware/errorHandler';
-import jwt from 'jsonwebtoken';
 import { uploadFile, deleteFile, getPresignedUrl } from '../config/minio';
 import {
     CreateCourseInput,
@@ -27,6 +25,7 @@ import {
     SearchInstructorResponse,
     GetEnrolledStudentsInput,
     GetEnrolledStudentsResponse,
+    EnrolledStudentData,
     GetQuizScoresInput,
     GetQuizScoresResponse,
     GetQuizAttemptDetailInput,
@@ -38,6 +37,7 @@ import {
     CloneCourseResponse,
     setCourseDraft,
     setCourseDraftResponse,
+    GetAllMyStudentsResponse,
 } from "../types/CoursesInstructor.types";
 import { auditService } from './audit.service';
 import { AuditAction } from '@prisma/client';
@@ -121,10 +121,9 @@ export class CoursesInstructorService {
 
     static async listMyCourses(input: ListMyCoursesInput): Promise<ListMyCourseResponse> {
         try {
-            const decoded = jwt.verify(input.token, config.jwt.secret) as { id: number; type: string };
             const courseInstructors = await prisma.courseInstructor.findMany({
                 where: {
-                    user_id: decoded.id,
+                    user_id: input.userId,
                     course: input.status ? { status: input.status } : undefined
                 },
                 include: {
@@ -157,9 +156,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to retrieve courses', { error });
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: 0,
@@ -174,12 +172,10 @@ export class CoursesInstructorService {
 
     static async getmyCourse(getmyCourse: getmyCourse): Promise<GetMyCourseResponse> {
         try {
-            const decoded = jwt.verify(getmyCourse.token, config.jwt.secret) as { id: number; type: string };
-
             // Check if user is instructor of this course
             const courseInstructor = await prisma.courseInstructor.findFirst({
                 where: {
-                    user_id: decoded.id,
+                    user_id: getmyCourse.userId,
                     course_id: getmyCourse.course_id
                 },
                 include: {
@@ -225,9 +221,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to retrieve course', { error });
-            const decoded = jwt.decode(getmyCourse.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: getmyCourse.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: getmyCourse.course_id,
@@ -240,9 +235,9 @@ export class CoursesInstructorService {
         }
     }
 
-    static async updateCourse(token: string, courseId: number, courseData: UpdateCourseInput): Promise<createCourseResponse> {
+    static async updateCourse(userId: number, courseId: number, courseData: UpdateCourseInput): Promise<createCourseResponse> {
         try {
-            await this.validateCourseInstructor(token, courseId);
+            await this.validateCourseInstructor(userId, courseId);
 
             const course = await prisma.course.update({
                 where: {
@@ -258,9 +253,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to update course', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: courseId,
@@ -273,9 +267,9 @@ export class CoursesInstructorService {
         }
     }
 
-    static async uploadThumbnail(token: string, courseId: number, file: Express.Multer.File): Promise<{ code: number; message: string; data: { course_id: number; thumbnail_url: string } }> {
+    static async uploadThumbnail(userId: number, courseId: number, file: Express.Multer.File): Promise<{ code: number; message: string; data: { course_id: number; thumbnail_url: string } }> {
         try {
-            await this.validateCourseInstructor(token, courseId);
+            await this.validateCourseInstructor(userId, courseId);
 
             // Get current course to check for existing thumbnail
             const currentCourse = await prisma.course.findUnique({
@@ -322,9 +316,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to upload thumbnail', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: courseId,
@@ -337,9 +330,9 @@ export class CoursesInstructorService {
         }
     }
 
-    static async deleteCourse(token: string, courseId: number): Promise<createCourseResponse> {
+    static async deleteCourse(userId: number, courseId: number): Promise<createCourseResponse> {
         try {
-            const courseInstructorId = await this.validateCourseInstructor(token, courseId);
+            const courseInstructorId = await this.validateCourseInstructor(userId, courseId);
             if (!courseInstructorId.is_primary) {
                 throw new ForbiddenError('You have no permission to delete this course');
             }
@@ -365,9 +358,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to delete course', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: courseId,
@@ -382,11 +374,10 @@ export class CoursesInstructorService {
 
     static async sendCourseForReview(sendCourseForReview: sendCourseForReview): Promise<submitCourseResponse> {
         try {
-            const decoded = jwt.verify(sendCourseForReview.token, config.jwt.secret) as { id: number; type: string };
             await prisma.courseApproval.create({
                 data: {
                     course_id: sendCourseForReview.course_id,
-                    submitted_by: decoded.id,
+                    submitted_by: sendCourseForReview.userId,
                 }
             });
             await prisma.course.update({
@@ -398,7 +389,7 @@ export class CoursesInstructorService {
                 }
             });
             await auditService.logSync({
-                userId: decoded.id,
+                userId: sendCourseForReview.userId,
                 action: AuditAction.UPDATE,
                 entityType: 'Course',
                 entityId: sendCourseForReview.course_id,
@@ -412,9 +403,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to send course for review', { error });
-            const decoded = jwt.decode(sendCourseForReview.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: sendCourseForReview.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: sendCourseForReview.course_id,
@@ -429,7 +419,7 @@ export class CoursesInstructorService {
 
     static async setCourseDraft(setCourseDraft: setCourseDraft): Promise<setCourseDraftResponse> {
         try {
-            await this.validateCourseInstructor(setCourseDraft.token, setCourseDraft.course_id);
+            await this.validateCourseInstructor(setCourseDraft.userId, setCourseDraft.course_id);
             await prisma.course.update({
                 where: {
                     id: setCourseDraft.course_id,
@@ -445,9 +435,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to set course to draft', { error });
-            const decoded = jwt.decode(setCourseDraft.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: setCourseDraft.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: setCourseDraft.course_id,
@@ -460,7 +449,7 @@ export class CoursesInstructorService {
         }
     }
 
-    static async getCourseApprovals(token: string, courseId: number): Promise<{
+    static async getCourseApprovals(userId: number, courseId: number): Promise<{
         code: number;
         message: string;
         data: any[];
@@ -468,7 +457,7 @@ export class CoursesInstructorService {
     }> {
         try {
             // Validate instructor access
-            await this.validateCourseInstructor(token, courseId);
+            await this.validateCourseInstructor(userId, courseId);
 
             const approvals = await prisma.courseApproval.findMany({
                 where: { course_id: courseId },
@@ -491,9 +480,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to retrieve course approvals', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: courseId,
@@ -510,8 +498,6 @@ export class CoursesInstructorService {
 
     static async searchInstructors(input: SearchInstructorInput): Promise<SearchInstructorResponse> {
         try {
-            const decoded = jwt.verify(input.token, config.jwt.secret) as { id: number };
-
             // Get existing instructors in the course
             const existingInstructors = await prisma.courseInstructor.findMany({
                 where: { course_id: input.course_id },
@@ -528,7 +514,7 @@ export class CoursesInstructorService {
                     ],
                     role: { code: 'INSTRUCTOR' },
                     id: {
-                        notIn: [decoded.id, ...existingInstructorIds],
+                        notIn: [input.userId, ...existingInstructorIds],
                     },
                 },
                 include: {
@@ -563,9 +549,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to search instructors', { error });
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: input.course_id,
@@ -581,7 +566,7 @@ export class CoursesInstructorService {
     static async addInstructorToCourse(addinstructorCourse: addinstructorCourse): Promise<addinstructorCourseResponse> {
         try {
             // Validate user is instructor of this course
-            await this.validateCourseInstructor(addinstructorCourse.token, addinstructorCourse.course_id);
+            await this.validateCourseInstructor(addinstructorCourse.userId, addinstructorCourse.course_id);
 
             // Find user by email or username
             const user = await prisma.user.findFirst({
@@ -619,9 +604,8 @@ export class CoursesInstructorService {
                 }
             });
 
-            const decoded = jwt.decode(addinstructorCourse.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: addinstructorCourse.userId,
                 action: AuditAction.CREATE,
                 entityType: 'Course',
                 entityId: addinstructorCourse.course_id,
@@ -637,9 +621,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to add instructor to course', { error });
-            const decoded = jwt.decode(addinstructorCourse.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: addinstructorCourse.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: addinstructorCourse.course_id,
@@ -654,7 +637,6 @@ export class CoursesInstructorService {
 
     static async removeInstructorFromCourse(removeinstructorCourse: removeinstructorCourse): Promise<removeinstructorCourseResponse> {
         try {
-            const decoded = jwt.verify(removeinstructorCourse.token, config.jwt.secret) as { id: number; type: string };
             await prisma.courseInstructor.delete({
                 where: {
                     course_id_user_id: {
@@ -665,7 +647,7 @@ export class CoursesInstructorService {
             });
 
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: removeinstructorCourse.userId,
                 action: AuditAction.DELETE,
                 entityType: 'Course',
                 entityId: removeinstructorCourse.course_id,
@@ -682,9 +664,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to remove instructor from course', { error });
-            const decoded = jwt.decode(removeinstructorCourse.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: removeinstructorCourse.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: removeinstructorCourse.course_id,
@@ -699,7 +680,6 @@ export class CoursesInstructorService {
 
     static async listInstructorsOfCourse(listinstructorCourse: listinstructorCourse): Promise<listinstructorCourseResponse> {
         try {
-            const decoded = jwt.verify(listinstructorCourse.token, config.jwt.secret) as { id: number; type: string };
             const courseInstructors = await prisma.courseInstructor.findMany({
                 where: {
                     course_id: listinstructorCourse.course_id,
@@ -743,9 +723,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to retrieve instructors of course', { error });
-            const decoded = jwt.decode(listinstructorCourse.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: listinstructorCourse.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: listinstructorCourse.course_id,
@@ -760,7 +739,6 @@ export class CoursesInstructorService {
 
     static async setPrimaryInstructor(setprimaryCourseInstructor: setprimaryCourseInstructor): Promise<setprimaryCourseInstructorResponse> {
         try {
-            const decoded = jwt.verify(setprimaryCourseInstructor.token, config.jwt.secret) as { id: number; type: string };
             await prisma.courseInstructor.update({
                 where: {
                     course_id_user_id: {
@@ -774,7 +752,7 @@ export class CoursesInstructorService {
             });
 
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: setprimaryCourseInstructor.userId,
                 action: AuditAction.UPDATE,
                 entityType: 'Course',
                 entityId: setprimaryCourseInstructor.course_id,
@@ -791,9 +769,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error('Failed to set primary instructor', { error });
-            const decoded = jwt.decode(setprimaryCourseInstructor.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: setprimaryCourseInstructor.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: setprimaryCourseInstructor.course_id,
@@ -806,11 +783,10 @@ export class CoursesInstructorService {
         }
     }
 
-    static async validateCourseInstructor(token: string, courseId: number): Promise<{ user_id: number; is_primary: boolean }> {
+    static async validateCourseInstructor(userId: number, courseId: number): Promise<{ user_id: number; is_primary: boolean }> {
-        const decoded = jwt.verify(token, config.jwt.secret) as { id: number; type: string };
         const courseInstructor = await prisma.courseInstructor.findFirst({
             where: {
-                user_id: decoded.id,
+                user_id: userId,
                 course_id: courseId
             }
         });
@@ -839,10 +815,10 @@ export class CoursesInstructorService {
      */
     static async getEnrolledStudents(input: GetEnrolledStudentsInput): Promise<GetEnrolledStudentsResponse> {
         try {
-            const { token, course_id, page = 1, limit = 20, search, status } = input;
+            const { userId, course_id, page = 1, limit = 20, search, status } = input;
 
             // Validate instructor
-            await this.validateCourseInstructor(token, course_id);
+            await this.validateCourseInstructor(userId, course_id);
 
             // Build where clause
             const whereClause: any = { course_id };
@@ -917,9 +893,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error(`Error getting enrolled students: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: input.course_id,
@@ -938,11 +913,10 @@ export class CoursesInstructorService {
      */
     static async getQuizScores(input: GetQuizScoresInput): Promise<GetQuizScoresResponse> {
         try {
-            const { token, course_id, lesson_id, page = 1, limit = 20, search, is_passed } = input;
+            const { userId, course_id, lesson_id, page = 1, limit = 20, search, is_passed } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
 
             // Validate instructor
-            await this.validateCourseInstructor(token, course_id);
+            await this.validateCourseInstructor(userId, course_id);
 
             // Get lesson and verify it's a QUIZ type
             const lesson = await prisma.lesson.findUnique({
@@ -1095,9 +1069,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error(`Error getting quiz scores: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: input.course_id,
@@ -1116,10 +1089,10 @@ export class CoursesInstructorService {
      */
     static async getQuizAttemptDetail(input: GetQuizAttemptDetailInput): Promise<GetQuizAttemptDetailResponse> {
         try {
-            const { token, course_id, lesson_id, student_id } = input;
+            const { userId, course_id, lesson_id, student_id } = input;
 
             // Validate instructor
-            await this.validateCourseInstructor(token, course_id);
+            await this.validateCourseInstructor(userId, course_id);
 
             // Get lesson and verify it's a QUIZ type
             const lesson = await prisma.lesson.findUnique({
@@ -1219,9 +1192,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error(`Error getting quiz attempt detail: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: input.course_id,
@@ -1240,10 +1212,10 @@ export class CoursesInstructorService {
      */
     static async getEnrolledStudentDetail(input: GetEnrolledStudentDetailInput): Promise<GetEnrolledStudentDetailResponse> {
         try {
-            const { token, course_id, student_id } = input;
+            const { userId, course_id, student_id } = input;
 
             // Validate instructor
-            await this.validateCourseInstructor(token, course_id);
+            await this.validateCourseInstructor(userId, course_id);
 
             // Get student info
             const student = await prisma.user.findUnique({
@@ -1367,9 +1339,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error(`Error getting enrolled student detail: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: input.course_id,
@@ -1386,12 +1357,10 @@ export class CoursesInstructorService {
      * ดึงประวัติการขออนุมัติคอร์ส
      * Get course approval history for instructor to see rejection reasons
      */
-    static async getCourseApprovalHistory(token: string, courseId: number): Promise<GetCourseApprovalHistoryResponse> {
+    static async getCourseApprovalHistory(userId: number, courseId: number): Promise<GetCourseApprovalHistoryResponse> {
         try {
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
-
             // Validate instructor access
-            await this.validateCourseInstructor(token, courseId);
+            await this.validateCourseInstructor(userId, courseId);
 
             // Get course with approval history
             const course = await prisma.course.findUnique({
@@ -1434,9 +1403,8 @@ export class CoursesInstructorService {
             };
         } catch (error) {
             logger.error(`Error getting course approval history: ${error}`);
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || undefined,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: courseId,
@@ -1454,11 +1422,10 @@ export class CoursesInstructorService {
      */
     static async cloneCourse(input: CloneCourseInput): Promise<CloneCourseResponse> {
         try {
-            const { token, course_id, title } = input;
+            const { userId, course_id, title } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
 
             // Validate instructor
-            const courseInstructor = await this.validateCourseInstructor(token, course_id);
+            const courseInstructor = await this.validateCourseInstructor(userId, course_id);
             if (!courseInstructor) {
                 throw new ForbiddenError('You are not an instructor of this course');
             }
@@ -1508,7 +1475,7 @@ export class CoursesInstructorService {
                         is_free: originalCourse.is_free,
                         have_certificate: originalCourse.have_certificate,
                         status: 'DRAFT', // Reset status
-                        created_by: decoded.id
+                        created_by: userId
                     }
                 });
 
@@ -1516,7 +1483,7 @@ export class CoursesInstructorService {
                 await tx.courseInstructor.create({
                     data: {
                         course_id: createdCourse.id,
-                        user_id: decoded.id,
+                        user_id: userId,
                         is_primary: true
                     }
                 });
@@ -1589,7 +1556,7 @@ export class CoursesInstructorService {
                                     shuffle_questions: lesson.quiz.shuffle_questions,
                                     shuffle_choices: lesson.quiz.shuffle_choices,
                                     show_answers_after_completion: lesson.quiz.show_answers_after_completion,
-                                    created_by: decoded.id
+                                    created_by: userId
                                 }
                             });
 
@@ -1636,7 +1603,7 @@ export class CoursesInstructorService {
             });
 
             await auditService.logSync({
-                userId: decoded.id,
+                userId: input.userId,
                 action: AuditAction.CREATE,
                 entityType: 'Course',
                 entityId: newCourse.id,
@@ -1658,9 +1625,8 @@ export class CoursesInstructorService {
 
         } catch (error) {
             logger.error(`Error cloning course: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Course',
                 entityId: input.course_id,
@@ -1672,4 +1638,45 @@ export class CoursesInstructorService {
             throw error;
         }
     }
+
+    /**
+     * ดึงผู้เรียนทั้งหมดในทุกคอร์สของ instructor
+     * Get all enrolled students across all courses the instructor owns/teaches
+     */
+    static async getMyAllStudents(userId: number): Promise<GetAllMyStudentsResponse> {
+        try {
+            // หา course IDs ทั้งหมดที่ instructor สอน
+            const instructorCourses = await prisma.courseInstructor.findMany({
+                where: { user_id: userId },
+                select: { course_id: true }
+            });
+
+            const courseIds = instructorCourses.map(ci => ci.course_id);
+
+            if (courseIds.length === 0) {
+                return { code: 200, message: 'Students retrieved successfully', total_students: 0, total_completed: 0 };
+            }
+
+            // unique students ทั้งหมด
+            const uniqueStudents = await prisma.enrollment.groupBy({
+                by: ['user_id'],
+                where: { course_id: { in: courseIds } },
+            });
+
+            // จำนวน enrollment ที่ COMPLETED
+            const totalCompleted = await prisma.enrollment.count({
+                where: { course_id: { in: courseIds }, status: 'COMPLETED' }
+            });
+
+            return {
+                code: 200,
+                message: 'Students retrieved successfully',
+                total_students: uniqueStudents.length,
+                total_completed: totalCompleted,
+            };
+        } catch (error) {
+            logger.error(`Error getting all students: ${error}`);
+            throw error;
+        }
+    }
 }

Backend/src/services/CoursesStudent.service.ts

@@ -133,7 +133,7 @@ export class CoursesStudentService {
     async enrollCourse(input: EnrollCourseInput): Promise<EnrollCourseResponse> {
         try {
             const { course_id } = input;
-            const decoded = jwt.verify(input.token, config.jwt.secret) as { id: number; type: string };
+            const userId = input.userId;
 
             const course = await prisma.course.findUnique({
                 where: { id: course_id },
@@ -146,7 +146,7 @@ export class CoursesStudentService {
             const existingEnrollment = await prisma.enrollment.findUnique({
                 where: {
                     unique_enrollment: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         course_id,
                     },
                 },
@@ -159,7 +159,7 @@ export class CoursesStudentService {
             const enrollment = await prisma.enrollment.create({
                 data: {
                     course_id,
-                    user_id: decoded.id,
+                    user_id: userId,
                     status: 'ENROLLED',
                     enrolled_at: new Date(),
                 },
@@ -167,11 +167,11 @@ export class CoursesStudentService {
 
             // Audit log - ENROLL
             auditService.log({
-                userId: decoded.id,
+                userId: userId,
                 action: AuditAction.ENROLL,
                 entityType: 'Enrollment',
                 entityId: enrollment.id,
-                newValue: { course_id, user_id: decoded.id, status: 'ENROLLED' }
+                newValue: { course_id, user_id: userId, status: 'ENROLLED' }
             });
 
             return {
@@ -187,9 +187,9 @@ export class CoursesStudentService {
             };
         } catch (error) {
             logger.error(`Error enrolling in course: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
+            // userId from middleware
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Enrollment',
                 entityId: 0,
@@ -206,13 +206,13 @@ export class CoursesStudentService {
 
     async GetEnrolledCourses(input: ListEnrolledCoursesInput): Promise<ListEnrolledCoursesResponse> {
         try {
-            const { token } = input;
+            // destructure input
             const page = input.page ?? 1;
             const limit = input.limit ?? 20;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; type: string };
+            const userId = input.userId;
             const enrollments = await prisma.enrollment.findMany({
                 where: {
-                    user_id: decoded.id,
+                    user_id: userId,
                 },
                 include: {
                     course: {
@@ -230,7 +230,7 @@ export class CoursesStudentService {
             });
             const total = await prisma.enrollment.count({
                 where: {
-                    user_id: decoded.id,
+                    user_id: userId,
                 },
             });
 
@@ -274,9 +274,9 @@ export class CoursesStudentService {
             };
         } catch (error) {
             logger.error(error);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
+            // userId from middleware
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Enrollment',
                 entityId: 0,
@@ -290,8 +290,8 @@ export class CoursesStudentService {
     }
     async getCourseLearning(input: GetCourseLearningInput): Promise<GetCourseLearningResponse> {
         try {
-            const { token, course_id } = input;
+            const { course_id } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; type: string };
+            const userId = input.userId;
 
             // Get course with chapters and lessons (basic info only)
             const course = await prisma.course.findUnique({
@@ -330,7 +330,7 @@ export class CoursesStudentService {
             const enrollment = await prisma.enrollment.findUnique({
                 where: {
                     unique_enrollment: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         course_id,
                     },
                 },
@@ -345,7 +345,7 @@ export class CoursesStudentService {
                 prisma.enrollment.update({
                     where: {
                         unique_enrollment: {
-                            user_id: decoded.id,
+                            user_id: userId,
                             course_id,
                         },
                     },
@@ -357,7 +357,7 @@ export class CoursesStudentService {
             const lessonIds = course.chapters.flatMap(ch => ch.lessons.map(l => l.id));
             const lessonProgress = await prisma.lessonProgress.findMany({
                 where: {
-                    user_id: decoded.id,
+                    user_id: userId,
                     lesson_id: { in: lessonIds },
                 },
             });
@@ -453,9 +453,9 @@ export class CoursesStudentService {
             };
         } catch (error) {
             logger.error(error);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
+            // userId from middleware
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Enrollment',
                 entityId: 0,
@@ -470,8 +470,8 @@ export class CoursesStudentService {
 
     async getlessonContent(input: GetLessonContentInput): Promise<GetLessonContentResponse> {
         try {
-            const { token, course_id, lesson_id } = input;
+            const { course_id, lesson_id } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; type: string };
+            const userId = input.userId;
 
             // Import MinIO functions
 
@@ -479,7 +479,7 @@ export class CoursesStudentService {
             const enrollment = await prisma.enrollment.findUnique({
                 where: {
                     unique_enrollment: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         course_id,
                     },
                 },
@@ -528,7 +528,7 @@ export class CoursesStudentService {
             const lessonProgress = await prisma.lessonProgress.findUnique({
                 where: {
                     user_id_lesson_id: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         lesson_id,
                     },
                 },
@@ -639,7 +639,7 @@ export class CoursesStudentService {
                 // Get latest quiz attempt for this user
                 latestQuizAttempt = await prisma.quizAttempt.findFirst({
                     where: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         quiz_id: lesson.quiz.id,
                     },
                     orderBy: {
@@ -726,9 +726,9 @@ export class CoursesStudentService {
             };
         } catch (error) {
             logger.error(error);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
+            // userId from middleware
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Enrollment',
                 entityId: 0,
@@ -744,14 +744,14 @@ export class CoursesStudentService {
 
     async checkAccessLesson(input: CheckLessonAccessInput): Promise<CheckLessonAccessResponse> {
         try {
-            const { token, course_id, lesson_id } = input;
+            const { course_id, lesson_id } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; type: string };
+            const userId = input.userId;
 
             // Check enrollment
             const enrollment = await prisma.enrollment.findUnique({
                 where: {
                     unique_enrollment: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         course_id,
                     },
                 },
@@ -845,7 +845,7 @@ export class CoursesStudentService {
             // Get user's progress for prerequisite lessons
             const prerequisiteProgress = await prisma.lessonProgress.findMany({
                 where: {
-                    user_id: decoded.id,
+                    user_id: userId,
                     lesson_id: { in: prerequisiteIds },
                 },
             });
@@ -879,7 +879,7 @@ export class CoursesStudentService {
                     // Check if user passed the quiz
                     const quizAttempt = await prisma.quizAttempt.findFirst({
                         where: {
-                            user_id: decoded.id,
+                            user_id: userId,
                             quiz_id: prereqLesson.quiz.id,
                             is_passed: true,
                         },
@@ -925,9 +925,9 @@ export class CoursesStudentService {
             };
         } catch (error) {
             logger.error(error);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
+            // userId from middleware
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Enrollment',
                 entityId: 0,
@@ -942,8 +942,8 @@ export class CoursesStudentService {
 
     async getVideoProgress(input: GetVideoProgressInput): Promise<GetVideoProgressResponse> {
         try {
-            const { token, lesson_id } = input;
+            const { lesson_id } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; type: string };
+            const userId = input.userId;
 
             // Get lesson to find course_id
             const lesson = await prisma.lesson.findUnique({
@@ -966,7 +966,7 @@ export class CoursesStudentService {
             const enrollment = await prisma.enrollment.findUnique({
                 where: {
                     unique_enrollment: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         course_id,
                     },
                 },
@@ -980,7 +980,7 @@ export class CoursesStudentService {
             const progress = await prisma.lessonProgress.findUnique({
                 where: {
                     user_id_lesson_id: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         lesson_id,
                     },
                 },
@@ -1010,9 +1010,9 @@ export class CoursesStudentService {
             };
         } catch (error) {
             logger.error(error);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
+            // userId from middleware
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Enrollment',
                 entityId: 0,
@@ -1027,8 +1027,8 @@ export class CoursesStudentService {
 
     async saveVideoProgress(input: SaveVideoProgressInput): Promise<SaveVideoProgressResponse> {
         try {
-            const { token, lesson_id, video_progress_seconds, video_duration_seconds } = input;
+            const { lesson_id, video_progress_seconds, video_duration_seconds } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; type: string };
+            const userId = input.userId;
 
             // Get lesson to find course_id
             const lesson = await prisma.lesson.findUnique({
@@ -1051,7 +1051,7 @@ export class CoursesStudentService {
             const enrollment = await prisma.enrollment.findUnique({
                 where: {
                     unique_enrollment: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         course_id,
                     },
                 },
@@ -1074,12 +1074,12 @@ export class CoursesStudentService {
             const progress = await prisma.lessonProgress.upsert({
                 where: {
                     user_id_lesson_id: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         lesson_id,
                     },
                 },
                 create: {
-                    user_id: decoded.id,
+                    user_id: userId,
                     lesson_id,
                     video_progress_seconds,
                     video_duration_seconds: video_duration_seconds ?? null,
@@ -1098,7 +1098,7 @@ export class CoursesStudentService {
             // If video completed, mark lesson as complete and update enrollment progress
             let enrollmentProgress: { progress_percentage: number; is_course_completed: boolean } | undefined;
             if (isCompleted) {
-                const result = await this.markLessonComplete(decoded.id, lesson_id, course_id);
+                const result = await this.markLessonComplete(userId, lesson_id, course_id);
                 enrollmentProgress = result.enrollmentProgress;
             }
 
@@ -1118,9 +1118,9 @@ export class CoursesStudentService {
             };
         } catch (error) {
             logger.error(error);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
+            // userId from middleware
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Enrollment',
                 entityId: 0,
@@ -1135,8 +1135,8 @@ export class CoursesStudentService {
 
     async completeLesson(input: CompleteLessonInput): Promise<CompleteLessonResponse> {
         try {
-            const { token, lesson_id } = input;
+            const { lesson_id } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; type: string };
+            const userId = input.userId;
 
             // Get lesson with chapter and course info
             const lesson = await prisma.lesson.findUnique({
@@ -1185,7 +1185,7 @@ export class CoursesStudentService {
             const enrollment = await prisma.enrollment.findUnique({
                 where: {
                     unique_enrollment: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         course_id,
                     },
                 },
@@ -1196,7 +1196,7 @@ export class CoursesStudentService {
             }
 
             // Mark lesson as complete and update enrollment progress
-            const { lessonProgress, enrollmentProgress } = await this.markLessonComplete(decoded.id, lesson_id, course_id);
+            const { lessonProgress, enrollmentProgress } = await this.markLessonComplete(userId, lesson_id, course_id);
             const { progress_percentage: course_progress_percentage, is_course_completed } = enrollmentProgress;
 
             // Find next lesson
@@ -1225,7 +1225,7 @@ export class CoursesStudentService {
                 // Check if certificate already exists
                 const existingCertificate = await prisma.certificate.findFirst({
                     where: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         course_id,
                     },
                 });
@@ -1233,10 +1233,10 @@ export class CoursesStudentService {
                 if (!existingCertificate) {
                     await prisma.certificate.create({
                         data: {
-                            user_id: decoded.id,
+                            user_id: userId,
                             course_id,
                             enrollment_id: enrollment.id,
-                            file_path: `certificates/${course_id}/${decoded.id}/${Date.now()}.pdf`,
+                            file_path: `certificates/${course_id}/${userId}/${Date.now()}.pdf`,
                             issued_at: new Date(),
                         },
                     });
@@ -1261,9 +1261,9 @@ export class CoursesStudentService {
             };
         } catch (error) {
             logger.error(`Error completing lesson: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
+            // userId from middleware
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'LessonProgress',
                 entityId: input.lesson_id,
@@ -1283,14 +1283,14 @@ export class CoursesStudentService {
      */
     async submitQuiz(input: SubmitQuizInput): Promise<SubmitQuizResponse> {
         try {
-            const { token, course_id, lesson_id, answers } = input;
+            const { course_id, lesson_id, answers } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
+            const userId = input.userId;
 
             // Check enrollment
             const enrollment = await prisma.enrollment.findUnique({
                 where: {
                     unique_enrollment: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         course_id,
                     },
                 },
@@ -1331,7 +1331,7 @@ export class CoursesStudentService {
             // Get previous attempt count
             const previousAttempts = await prisma.quizAttempt.count({
                 where: {
-                    user_id: decoded.id,
+                    user_id: userId,
                     quiz_id: quiz.id,
                 },
             });
@@ -1384,7 +1384,7 @@ export class CoursesStudentService {
             const now = new Date();
             const quizAttempt = await prisma.quizAttempt.create({
                 data: {
-                    user_id: decoded.id,
+                    user_id: userId,
                     quiz_id: quiz.id,
                     score: earnedScore,
                     total_questions: quiz.questions.length,
@@ -1400,7 +1400,7 @@ export class CoursesStudentService {
             // If passed, mark lesson as complete and update enrollment progress
             let enrollmentProgress: { progress_percentage: number; is_course_completed: boolean } | undefined;
             if (isPassed) {
-                const result = await this.markLessonComplete(decoded.id, lesson_id, course_id);
+                const result = await this.markLessonComplete(userId, lesson_id, course_id);
                 enrollmentProgress = result.enrollmentProgress;
             }
 
@@ -1429,9 +1429,9 @@ export class CoursesStudentService {
             };
         } catch (error) {
             logger.error(`Error submitting quiz: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
+            // userId from middleware
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'QuizAttempt',
                 entityId: 0,
@@ -1452,14 +1452,14 @@ export class CoursesStudentService {
      */
     async getQuizAttempts(input: GetQuizAttemptsInput): Promise<GetQuizAttemptsResponse> {
         try {
-            const { token, course_id, lesson_id } = input;
+            const { course_id, lesson_id } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
+            const userId = input.userId;
 
             // Check enrollment
             const enrollment = await prisma.enrollment.findUnique({
                 where: {
                     unique_enrollment: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         course_id,
                     },
                 },
@@ -1494,7 +1494,7 @@ export class CoursesStudentService {
             // Get all quiz attempts for this user
             const attempts = await prisma.quizAttempt.findMany({
                 where: {
-                    user_id: decoded.id,
+                    user_id: userId,
                     quiz_id: lesson.quiz.id,
                 },
                 orderBy: { attempt_number: 'desc' },
@@ -1539,10 +1539,9 @@ export class CoursesStudentService {
             };
         } catch (error) {
             logger.error(error);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
+            // userId from middleware
-            if (decoded?.id) {
             await auditService.logSync({
-                    userId: decoded.id,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'QuizAttempt',
                 entityId: 0,
@@ -1553,7 +1552,6 @@ export class CoursesStudentService {
                     error: error instanceof Error ? error.message : String(error)
                 }
             });
-            }
             throw error;
         }
     }

Backend/src/services/RecommendedCourses.service.ts

@@ -1,8 +1,6 @@
 import { prisma } from '../config/database';
-import { config } from '../config';
 import { logger } from '../config/logger';
 import { NotFoundError, ValidationError } from '../middleware/errorHandler';
-import jwt from 'jsonwebtoken';
 import { getPresignedUrl } from '../config/minio';
 import {
     ListApprovedCoursesResponse,
@@ -20,7 +18,7 @@ export class RecommendedCoursesService {
      * List all approved courses (for admin to manage recommendations)
      */
     static async listApprovedCourses(
-        token: string,
+        userId: number,
         filters?: { search?: string; categoryId?: number }
     ): Promise<ListApprovedCoursesResponse> {
         try {
@@ -108,10 +106,8 @@ export class RecommendedCoursesService {
             };
         } catch (error) {
             logger.error('Failed to list approved courses', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
-            if (decoded?.id) {
             await auditService.logSync({
-                    userId: decoded.id,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'RecommendedCourses',
                 entityId: 0,
@@ -120,7 +116,6 @@ export class RecommendedCoursesService {
                     error: error instanceof Error ? error.message : String(error)
                 }
             });
-            }
             throw error;
         }
     }
@@ -128,7 +123,7 @@ export class RecommendedCoursesService {
     /**
      * Get course by ID (for admin to view details)
      */
-    static async getCourseById(token: string, courseId: number): Promise<GetCourseByIdResponse> {
+    static async getCourseById(userId: number, courseId: number): Promise<GetCourseByIdResponse> {
         try {
             const course = await prisma.course.findUnique({
                 where: { id: courseId },
@@ -213,10 +208,8 @@ export class RecommendedCoursesService {
             };
         } catch (error) {
             logger.error('Failed to get course by ID', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
-            if (decoded?.id) {
             await auditService.logSync({
-                    userId: decoded.id,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'RecommendedCourses',
                 entityId: 0,
@@ -225,7 +218,6 @@ export class RecommendedCoursesService {
                     error: error instanceof Error ? error.message : String(error)
                 }
             });
-            }
             throw error;
         }
     }
@@ -234,12 +226,11 @@ export class RecommendedCoursesService {
      * Toggle course recommendation status
      */
     static async toggleRecommended(
-        token: string,
+        userId: number,
         courseId: number,
         isRecommended: boolean
     ): Promise<ToggleRecommendedResponse> {
         try {
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
 
             const course = await prisma.course.findUnique({ where: { id: courseId } });
             if (!course) {
@@ -257,7 +248,7 @@ export class RecommendedCoursesService {
 
             // Audit log
             await auditService.logSync({
-                userId: decoded.id,
+                userId,
                 action: AuditAction.UPDATE,
                 entityType: 'Course',
                 entityId: courseId,
@@ -276,9 +267,8 @@ export class RecommendedCoursesService {
             };
         } catch (error) {
             logger.error('Failed to toggle recommended status', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'RecommendedCourses',
                 entityId: courseId,

Backend/src/services/announcements.service.ts

@@ -1,8 +1,6 @@
 import { prisma } from '../config/database';
-import { config } from '../config';
 import { logger } from '../config/logger';
-import { UnauthorizedError, ForbiddenError, NotFoundError } from '../middleware/errorHandler';
+import { ForbiddenError, NotFoundError } from '../middleware/errorHandler';
-import jwt from 'jsonwebtoken';
 import {
     ListAnnouncementResponse,
     CreateAnnouncementInput,
@@ -31,27 +29,26 @@ export class AnnouncementsService {
      */
     async listAnnouncement(input: ListAnnouncementInput): Promise<ListAnnouncementResponse> {
         try {
-            const { token, course_id, page = 1, limit = 10 } = input;
+            const { userId, course_id, page = 1, limit = 10 } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; type: string };
 
             // Check user access - instructor, admin, or enrolled student
             const user = await prisma.user.findUnique({
-                where: { id: decoded.id },
+                where: { id: userId },
                 include: { role: true },
             });
-            if (!user) throw new UnauthorizedError('Invalid token');
+            if (!user) throw new ForbiddenError('User not found');
 
             // Admin can access all courses
             const isAdmin = user.role.code === 'ADMIN';
 
             // Check if instructor of this course
             const isInstructor = await prisma.courseInstructor.findFirst({
-                where: { course_id, user_id: decoded.id },
+                where: { course_id, user_id: userId },
             });
 
             // Check if enrolled student
             const isEnrolled = await prisma.enrollment.findFirst({
-                where: { course_id, user_id: decoded.id },
+                where: { course_id, user_id: userId },
             });
 
             if (!isAdmin && !isInstructor && !isEnrolled) throw new ForbiddenError('You do not have access to this course announcements');
@@ -130,9 +127,8 @@ export class AnnouncementsService {
             };
         } catch (error) {
             logger.error(`Error listing announcements: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Announcement',
                 entityId: 0,
@@ -150,11 +146,10 @@ export class AnnouncementsService {
      */
     async createAnnouncement(input: CreateAnnouncementInput): Promise<CreateAnnouncementResponse> {
         try {
-            const { token, course_id, title, content, status, is_pinned, published_at, files } = input;
+            const { userId, course_id, title, content, status, is_pinned, published_at, files } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
 
             // Validate instructor access
-            await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            await CoursesInstructorService.validateCourseInstructor(userId, course_id);
 
             // Determine published_at: use provided value or default to now if status is PUBLISHED
             let finalPublishedAt: Date | null = null;
@@ -171,7 +166,7 @@ export class AnnouncementsService {
                     status: status as any,
                     is_pinned,
                     published_at: finalPublishedAt,
-                    created_by: decoded.id,
+                    created_by: userId,
                 },
             });
 
@@ -236,9 +231,8 @@ export class AnnouncementsService {
             };
         } catch (error) {
             logger.error(`Error creating announcement: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Announcement',
                 entityId: 0,
@@ -256,11 +250,10 @@ export class AnnouncementsService {
      */
     async updateAnnouncement(input: UpdateAnnouncementInput): Promise<UpdateAnnouncementResponse> {
         try {
-            const { token, course_id, announcement_id, title, content, status, is_pinned, published_at } = input;
+            const { userId, course_id, announcement_id, title, content, status, is_pinned, published_at } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
 
             // Validate instructor access
-            await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            await CoursesInstructorService.validateCourseInstructor(userId, course_id);
 
             // Check announcement exists and belongs to course
             const existing = await prisma.announcement.findFirst({
@@ -289,7 +282,7 @@ export class AnnouncementsService {
                     status: status as any,
                     is_pinned,
                     published_at: finalPublishedAt,
-                    updated_by: decoded.id,
+                    updated_by: userId,
                 },
                 include: {
                     attachments: true,
@@ -320,9 +313,8 @@ export class AnnouncementsService {
             };
         } catch (error) {
             logger.error(`Error updating announcement: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Announcement',
                 entityId: 0,
@@ -340,11 +332,10 @@ export class AnnouncementsService {
      */
     async deleteAnnouncement(input: DeleteAnnouncementInput): Promise<DeleteAnnouncementResponse> {
         try {
-            const { token, course_id, announcement_id } = input;
+            const { userId, course_id, announcement_id } = input;
-            jwt.verify(token, config.jwt.secret) as { id: number };
 
             // Validate instructor access
-            await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            await CoursesInstructorService.validateCourseInstructor(userId, course_id);
 
             // Check announcement exists and belongs to course
             const existing = await prisma.announcement.findFirst({
@@ -376,9 +367,8 @@ export class AnnouncementsService {
             };
         } catch (error) {
             logger.error(`Error deleting announcement: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Announcement',
                 entityId: 0,
@@ -396,11 +386,10 @@ export class AnnouncementsService {
      */
     async uploadAttachment(input: UploadAnnouncementAttachmentInput): Promise<UploadAnnouncementAttachmentResponse> {
         try {
-            const { token, course_id, announcement_id, file } = input;
+            const { userId, course_id, announcement_id, file } = input;
-            jwt.verify(token, config.jwt.secret) as { id: number };
 
             // Validate instructor access
-            await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            await CoursesInstructorService.validateCourseInstructor(userId, course_id);
 
             // Check announcement exists and belongs to course
             const existing = await prisma.announcement.findFirst({
@@ -451,9 +440,8 @@ export class AnnouncementsService {
             };
         } catch (error) {
             logger.error(`Error uploading attachment: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Announcement',
                 entityId: 0,
@@ -471,11 +459,10 @@ export class AnnouncementsService {
      */
     async deleteAttachment(input: DeleteAnnouncementAttachmentInput): Promise<DeleteAnnouncementAttachmentResponse> {
         try {
-            const { token, course_id, announcement_id, attachment_id } = input;
+            const { userId, course_id, announcement_id, attachment_id } = input;
-            jwt.verify(token, config.jwt.secret) as { id: number };
 
             // Validate instructor access
-            await CoursesInstructorService.validateCourseInstructor(token, course_id);
+            await CoursesInstructorService.validateCourseInstructor(userId, course_id);
 
             // Check attachment exists and belongs to announcement in this course
             const attachment = await prisma.announcementAttachment.findFirst({
@@ -508,9 +495,8 @@ export class AnnouncementsService {
             };
         } catch (error) {
             logger.error(`Error deleting attachment: ${error}`);
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Announcement',
                 entityId: 0,

Backend/src/services/auth.service.ts

@@ -74,7 +74,6 @@ export class AuthService {
             data: {
                 token,
                 refreshToken,
-                user: await this.formatUserResponse(user)
             }
         };
     }

Backend/src/services/categories.service.ts

@@ -1,10 +1,7 @@
 import { prisma } from '../config/database';
 import { Prisma } from '@prisma/client';
-import { config } from '../config';
 import { logger } from '../config/logger';
-import jwt from 'jsonwebtoken';
 import { createCategory, createCategoryResponse, deleteCategoryResponse, updateCategory, updateCategoryResponse, ListCategoriesResponse, Category } from '../types/categories.type';
-import { UnauthorizedError, ValidationError, ForbiddenError } from '../middleware/errorHandler';
 import { auditService } from './audit.service';
 import { AuditAction } from '@prisma/client';
 
@@ -26,14 +23,13 @@ export class CategoryService {
         }
     }
 
-    async createCategory(token: string, category: createCategory): Promise<createCategoryResponse> {
+    async createCategory(userId: number, category: createCategory): Promise<createCategoryResponse> {
         try {
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; username: string; email: string; roleCode: string };
             const newCategory = await prisma.category.create({
                 data: category
             });
             auditService.log({
-                userId: decoded.id,
+                userId,
                 action: AuditAction.CREATE,
                 entityType: 'Category',
                 entityId: newCategory.id,
@@ -47,13 +43,13 @@ export class CategoryService {
                     name: newCategory.name as { th: string; en: string },
                     slug: newCategory.slug,
                     description: newCategory.description as { th: string; en: string },
-                    created_by: decoded.id,
+                    created_by: userId,
                 }
             };
         } catch (error) {
             logger.error('Failed to create category', { error });
             await auditService.logSync({
-                userId: 0,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Category',
                 entityId: 0,
@@ -66,15 +62,14 @@ export class CategoryService {
         }
     }
 
-    async updateCategory(token: string, id: number, category: updateCategory): Promise<updateCategoryResponse> {
+    async updateCategory(userId: number, id: number, category: updateCategory): Promise<updateCategoryResponse> {
         try {
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; username: string; email: string; roleCode: string };
             const updatedCategory = await prisma.category.update({
                 where: { id },
                 data: category
             });
             auditService.log({
-                userId: decoded.id,
+                userId,
                 action: AuditAction.UPDATE,
                 entityType: 'Category',
                 entityId: id,
@@ -88,13 +83,13 @@ export class CategoryService {
                     name: updatedCategory.name as { th: string; en: string },
                     slug: updatedCategory.slug,
                     description: updatedCategory.description as { th: string; en: string },
-                    updated_by: decoded.id,
+                    updated_by: userId,
                 }
             };
         } catch (error) {
             logger.error('Failed to update category', { error });
             await auditService.logSync({
-                userId: 0,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Category',
                 entityId: 0,
@@ -107,14 +102,13 @@ export class CategoryService {
         }
     }
 
-    async deleteCategory(token: string, id: number): Promise<deleteCategoryResponse> {
+    async deleteCategory(userId: number, id: number): Promise<deleteCategoryResponse> {
         try {
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; username: string; email: string; roleCode: string };
             const deletedCategory = await prisma.category.delete({
                 where: { id }
             });
             auditService.log({
-                userId: decoded.id,
+                userId,
                 action: AuditAction.DELETE,
                 entityType: 'Category',
                 entityId: id,
@@ -127,7 +121,7 @@ export class CategoryService {
         } catch (error) {
             logger.error('Failed to delete category', { error });
             await auditService.logSync({
-                userId: 0,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'Category',
                 entityId: 0,

Backend/src/services/certificate.service.ts

@@ -1,8 +1,6 @@
 import { prisma } from '../config/database';
-import { config } from '../config';
 import { logger } from '../config/logger';
 import { NotFoundError, ForbiddenError, ValidationError } from '../middleware/errorHandler';
-import jwt from 'jsonwebtoken';
 import { PDFDocument, rgb } from 'pdf-lib';
 import fontkit from '@pdf-lib/fontkit';
 import * as fs from 'fs';
@@ -29,14 +27,13 @@ export class CertificateService {
      */
     async generateCertificate(input: GenerateCertificateInput): Promise<GenerateCertificateResponse> {
         try {
-            const { token, course_id } = input;
+            const { userId, course_id } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
 
             // Check enrollment and completion
             const enrollment = await prisma.enrollment.findUnique({
                 where: {
                     unique_enrollment: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         course_id,
                     },
                 },
@@ -65,7 +62,7 @@ export class CertificateService {
             // Check if certificate already exists
             const existingCertificate = await prisma.certificate.findFirst({
                 where: {
-                    user_id: decoded.id,
+                    user_id: userId,
                     course_id,
                 },
             });
@@ -103,13 +100,13 @@ export class CertificateService {
 
             // Upload to MinIO
             const timestamp = Date.now();
-            const filePath = `certificates/${course_id}/${decoded.id}/${timestamp}.pdf`;
+            const filePath = `certificates/${course_id}/${userId}/${timestamp}.pdf`;
             await uploadFile(filePath, Buffer.from(pdfBytes), 'application/pdf');
 
             // Save to database
             const certificate = await prisma.certificate.create({
                 data: {
-                    user_id: decoded.id,
+                    user_id: userId,
                     course_id,
                     enrollment_id: enrollment.id,
                     file_path: filePath,
@@ -118,7 +115,7 @@ export class CertificateService {
             });
 
             auditService.log({
-                userId: decoded.id,
+                userId,
                 action: AuditAction.CREATE,
                 entityType: 'Certificate',
                 entityId: certificate.id,
@@ -139,9 +136,8 @@ export class CertificateService {
             };
         } catch (error) {
             logger.error('Failed to generate certificate', { error });
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Certificate',
                 entityId: 0,
@@ -160,12 +156,11 @@ export class CertificateService {
      */
     async getCertificate(input: GetCertificateInput): Promise<GetCertificateResponse> {
         try {
-            const { token, course_id } = input;
+            const { userId, course_id } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
 
             const certificate = await prisma.certificate.findFirst({
                 where: {
-                    user_id: decoded.id,
+                    user_id: userId,
                     course_id,
                 },
                 include: {
@@ -202,9 +197,8 @@ export class CertificateService {
             };
         } catch (error) {
             logger.error('Failed to get certificate', { error });
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Certificate',
                 entityId: 0,
@@ -223,12 +217,11 @@ export class CertificateService {
      */
     async listMyCertificates(input: ListMyCertificatesInput): Promise<ListMyCertificatesResponse> {
         try {
-            const { token } = input;
+            const { userId } = input;
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
 
             const certificates = await prisma.certificate.findMany({
                 where: {
-                    user_id: decoded.id,
+                    user_id: userId,
                 },
                 include: {
                     enrollment: {
@@ -267,9 +260,8 @@ export class CertificateService {
             };
         } catch (error) {
             logger.error('Failed to list certificates', { error });
-            const decoded = jwt.decode(input.token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id,
+                userId: input.userId,
                 action: AuditAction.ERROR,
                 entityType: 'Certificate',
                 entityId: 0,

Backend/src/services/user.service.ts

@@ -24,15 +24,10 @@ import { auditService } from './audit.service';
 import { AuditAction } from '@prisma/client';
 
 export class UserService {
-    async getUserProfile(token: string): Promise<UserResponse> {
+    async getUserProfile(userId: number): Promise<UserResponse> {
         try {
-            // Decode JWT token to get user ID
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; username: string; email: string; roleCode: string };
-
             const user = await prisma.user.findUnique({
-                where: {
+                where: { id: userId },
-                    id: decoded.id
-                },
                 include: {
                     profile: true,
                     role: true
@@ -68,14 +63,6 @@ export class UserService {
                 } : undefined
             };
         } catch (error) {
-            if (error instanceof jwt.JsonWebTokenError) {
-                logger.error('Invalid JWT token:', error);
-                throw new UnauthorizedError('Invalid token');
-            }
-            if (error instanceof jwt.TokenExpiredError) {
-                logger.error('JWT token expired:', error);
-                throw new UnauthorizedError('Token expired');
-            }
             logger.error('Error fetching user profile:', error);
             throw error;
         }
@@ -84,12 +71,9 @@ export class UserService {
     /**
      * Change user password
      */
-    async changePassword(token: string, oldPassword: string, newPassword: string): Promise<ChangePasswordResponse> {
+    async changePassword(userId: number, oldPassword: string, newPassword: string): Promise<ChangePasswordResponse> {
         try {
-            // Decode JWT token to get user ID
+            const user = await prisma.user.findUnique({ where: { id: userId } });
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; username: string; email: string; roleCode: string };
-
-            const user = await prisma.user.findUnique({ where: { id: decoded.id } });
             if (!user) throw new UnauthorizedError('User not found');
 
             // Check if account is deactivated
@@ -127,21 +111,12 @@ export class UserService {
                 message: 'Password changed successfully'
             };
         } catch (error) {
-            if (error instanceof jwt.JsonWebTokenError) {
-                logger.error('Invalid JWT token:', error);
-                throw new UnauthorizedError('Invalid token');
-            }
-            if (error instanceof jwt.TokenExpiredError) {
-                logger.error('JWT token expired:', error);
-                throw new UnauthorizedError('Token expired');
-            }
             logger.error('Failed to change password', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'User',
-                entityId: decoded?.id || 0,
+                entityId: userId,
                 metadata: {
                     operation: 'change_password',
                     error: error instanceof Error ? error.message : String(error)
@@ -154,12 +129,9 @@ export class UserService {
     /**
      * Update user profile
      */
-    async updateProfile(token: string, profile: ProfileUpdate): Promise<ProfileUpdateResponse> {
+    async updateProfile(userId: number, profile: ProfileUpdate): Promise<ProfileUpdateResponse> {
         try {
-            // Decode JWT token to get user ID
+            const user = await prisma.user.findUnique({ where: { id: userId } });
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; username: string; email: string; roleCode: string };
-
-            const user = await prisma.user.findUnique({ where: { id: decoded.id } });
             if (!user) throw new UnauthorizedError('User not found');
 
             // Check if account is deactivated
@@ -189,21 +161,12 @@ export class UserService {
                 }
             };
         } catch (error) {
-            if (error instanceof jwt.JsonWebTokenError) {
-                logger.error('Invalid JWT token:', error);
-                throw new UnauthorizedError('Invalid token');
-            }
-            if (error instanceof jwt.TokenExpiredError) {
-                logger.error('JWT token expired:', error);
-                throw new UnauthorizedError('Token expired');
-            }
             logger.error('Failed to update profile', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId,
                 action: AuditAction.UPDATE,
                 entityType: 'UserProfile',
-                entityId: decoded?.id || 0,
+                entityId: userId,
                 metadata: {
                     operation: 'update_profile',
                     error: error instanceof Error ? error.message : String(error)
@@ -213,9 +176,8 @@ export class UserService {
         }
     }
 
-    async getRoles(token: string): Promise<rolesResponse> {
+    async getRoles(): Promise<rolesResponse> {
         try {
-            jwt.verify(token, config.jwt.secret);
             const roles = await prisma.role.findMany({
                 select: {
                     id: true,
@@ -224,14 +186,6 @@ export class UserService {
             });
             return { roles };
         } catch (error) {
-            if (error instanceof jwt.TokenExpiredError) {
-                logger.error('JWT token expired:', error);
-                throw new UnauthorizedError('Token expired');
-            }
-            if (error instanceof jwt.JsonWebTokenError) {
-                logger.error('Invalid JWT token:', error);
-                throw new UnauthorizedError('Invalid token');
-            }
             logger.error('Failed to get roles', { error });
             throw error;
         }
@@ -240,13 +194,11 @@ export class UserService {
     /**
      * Upload avatar picture to MinIO
      */
-    async uploadAvatarPicture(token: string, file: Express.Multer.File): Promise<updateAvatarResponse> {
+    async uploadAvatarPicture(userId: number, file: Express.Multer.File): Promise<updateAvatarResponse> {
         try {
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number };
-
             // Check if user exists
             const user = await prisma.user.findUnique({
-                where: { id: decoded.id },
+                where: { id: userId },
                 include: { profile: true }
             });
 
@@ -265,7 +217,7 @@ export class UserService {
             const fileName = file.originalname || 'avatar';
             const extension = fileName.split('.').pop() || 'jpg';
             const safeFilename = `${timestamp}-${uniqueId}.${extension}`;
-            const filePath = `avatars/${decoded.id}/${safeFilename}`;
+            const filePath = `avatars/${userId}/${safeFilename}`;
 
             // Delete old avatar if exists
             if (user.profile?.avatar_url) {
@@ -285,13 +237,13 @@ export class UserService {
             // Update or create profile - store only file path
             if (user.profile) {
                 await prisma.userProfile.update({
-                    where: { user_id: decoded.id },
+                    where: { user_id: userId },
                     data: { avatar_url: filePath }
                 });
             } else {
                 await prisma.userProfile.create({
                     data: {
-                        user_id: decoded.id,
+                        user_id: userId,
                         avatar_url: filePath,
                         first_name: '',
                         last_name: ''
@@ -301,10 +253,10 @@ export class UserService {
 
             // Audit log - UPLOAD_AVATAR
             await auditService.logSync({
-                userId: decoded.id,
+                userId,
                 action: AuditAction.UPLOAD_FILE,
                 entityType: 'User',
-                entityId: decoded.id,
+                entityId: userId,
                 metadata: {
                     operation: 'upload_avatar',
                     filePath
@@ -318,26 +270,17 @@ export class UserService {
                 code: 200,
                 message: 'Avatar uploaded successfully',
                 data: {
-                    id: decoded.id,
+                    id: userId,
                     avatar_url: presignedUrl
                 }
             };
         } catch (error) {
-            if (error instanceof jwt.JsonWebTokenError) {
-                logger.error('Invalid JWT token:', error);
-                throw new UnauthorizedError('Invalid token');
-            }
-            if (error instanceof jwt.TokenExpiredError) {
-                logger.error('JWT token expired:', error);
-                throw new UnauthorizedError('Token expired');
-            }
             logger.error('Failed to upload avatar', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId,
                 action: AuditAction.UPLOAD_FILE,
                 entityType: 'UserProfile',
-                entityId: decoded?.id || 0,
+                entityId: userId,
                 metadata: {
                     operation: 'upload_avatar',
                     error: error instanceof Error ? error.message : String(error)
@@ -390,12 +333,10 @@ export class UserService {
     /**
      * Send verification email to user
      */
-    async sendVerifyEmail(token: string): Promise<SendVerifyEmailResponse> {
+    async sendVerifyEmail(userId: number): Promise<SendVerifyEmailResponse> {
         try {
-            const decoded = jwt.verify(token, config.jwt.secret) as { id: number; email: string; roleCode: string };
-
             const user = await prisma.user.findUnique({
-                where: { id: decoded.id },
+                where: { id: userId },
                 include: { role: true }
             });
 
@@ -453,15 +394,12 @@ export class UserService {
                 message: 'Verification email sent successfully'
             };
         } catch (error) {
-            if (error instanceof jwt.JsonWebTokenError) throw new UnauthorizedError('Invalid token');
-            if (error instanceof jwt.TokenExpiredError) throw new UnauthorizedError('Token expired');
             logger.error('Failed to send verification email', { error });
-            const decoded = jwt.decode(token) as { id: number } | null;
             await auditService.logSync({
-                userId: decoded?.id || 0,
+                userId,
                 action: AuditAction.ERROR,
                 entityType: 'UserProfile',
-                entityId: decoded?.id || 0,
+                entityId: userId,
                 metadata: {
                     operation: 'send_verification_email',
                     error: error instanceof Error ? error.message : String(error)

Backend/src/types/ChaptersLesson.typs.ts

@@ -98,18 +98,18 @@ export interface ChapterData {
 // ============================================
 
 export interface ChaptersRequest {
-    token: string;
+    userId: number;
     course_id: number;
 }
 
 export interface GetChapterRequest {
-    token: string;
+    userId: number;
     course_id: number;
     chapter_id: number;
 }
 
 export interface CreateChapterInput {
-    token: string;
+    userId: number;
     course_id: number;
     title: MultiLanguageText;
     description?: MultiLanguageText;
@@ -118,13 +118,13 @@ export interface CreateChapterInput {
 }
 
 export interface CreateChapterRequest {
-    token: string;
+    userId: number;
     course_id: number;
     data: CreateChapterInput;
 }
 
 export interface UpdateChapterInput {
-    token: string;
+    userId: number;
     course_id: number;
     chapter_id: number;
     title?: MultiLanguageText;
@@ -134,20 +134,20 @@ export interface UpdateChapterInput {
 }
 
 export interface UpdateChapterRequest {
-    token: string;
+    userId: number;
     course_id: number;
     chapter_id: number;
     data: UpdateChapterInput;
 }
 
 export interface DeleteChapterRequest {
-    token: string;
+    userId: number;
     course_id: number;
     chapter_id: number;
 }
 
 export interface ReorderChapterRequest {
-    token: string;
+    userId: number;
     course_id: number;
     chapter_id: number;
     sort_order: number;
@@ -199,7 +199,7 @@ export interface ReorderChapterResponse {
 // ============================================
 
 export interface GetLessonRequest {
-    token: string;
+    userId: number;
     course_id: number;
     chapter_id: number;
     lesson_id: number;
@@ -216,7 +216,7 @@ export interface UploadedFileInfo {
 }
 
 export interface CreateLessonInput {
-    token: string;
+    userId: number;
     course_id: number;
     chapter_id: number;
     title: MultiLanguageText;
@@ -293,7 +293,7 @@ export interface QuizChoiceData {
 }
 
 export interface CreateLessonRequest {
-    token: string;
+    userId: number;
     course_id: number;
     chapter_id: number;
     data: CreateLessonInput;
@@ -311,7 +311,7 @@ export interface UpdateLessonInput {
 }
 
 export interface UpdateLessonRequest {
-    token: string;
+    userId: number;
     course_id: number;
     chapter_id: number;
     lesson_id: number;
@@ -319,14 +319,14 @@ export interface UpdateLessonRequest {
 }
 
 export interface DeleteLessonRequest {
-    token: string;
+    userId: number;
     course_id: number;
     chapter_id: number;
     lesson_id: number;
 }
 
 export interface ReorderLessonsRequest {
-    token: string;
+    userId: number;
     course_id: number;
     chapter_id: number;
     lesson_id: number;
@@ -365,7 +365,7 @@ export interface UpdateLessonResponse {
  * Input for uploading video to a lesson
  */
 export interface UploadVideoInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     video: UploadedFileInfo;
@@ -375,7 +375,7 @@ export interface UploadVideoInput {
  * Input for updating (replacing) video in a lesson
  */
 export interface UpdateVideoInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     video: UploadedFileInfo;
@@ -385,7 +385,7 @@ export interface UpdateVideoInput {
  * Input for setting YouTube video to a lesson
  */
 export interface SetYouTubeVideoInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     youtube_video_id: string;
@@ -411,7 +411,7 @@ export interface YouTubeVideoResponse {
  * Input for uploading a single attachment to a lesson
  */
 export interface UploadAttachmentInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     attachment: UploadedFileInfo;
@@ -421,7 +421,7 @@ export interface UploadAttachmentInput {
  * Input for deleting an attachment from a lesson
  */
 export interface DeleteAttachmentInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     attachment_id: number;
@@ -490,7 +490,7 @@ export interface LessonWithDetailsResponse {
  * Input for adding quiz to an existing QUIZ lesson
  */
 export interface AddQuizToLessonInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     quiz_data: {
@@ -509,7 +509,7 @@ export interface AddQuizToLessonInput {
  * Input for adding a single question to a quiz lesson
  */
 export interface AddQuestionInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     question: MultiLanguageText;
@@ -532,7 +532,7 @@ export interface AddQuestionResponse {
  * Input for updating a question
  */
 export interface UpdateQuestionInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     question_id: number;
@@ -556,14 +556,14 @@ export interface UpdateQuestionResponse {
  * Input for deleting a question
  */
 export interface DeleteQuestionInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     question_id: number;
 }
 
 export interface ReorderQuestionInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     question_id: number;
@@ -588,7 +588,7 @@ export interface DeleteQuestionResponse {
  * Input for updating quiz settings
  */
 export interface UpdateQuizInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     title?: MultiLanguageText;

Backend/src/types/CoursesInstructor.types.ts

@@ -24,7 +24,7 @@ export interface createCourseResponse {
 }
 
 export interface ListMyCoursesInput {
-    token: string;
+    userId: number;
     status?: 'DRAFT' | 'PENDING' | 'APPROVED' | 'REJECTED' | 'ARCHIVED';
 }
 
@@ -42,7 +42,7 @@ export interface GetMyCourseResponse {
 }
 
 export interface getmyCourse {
-    token: string;
+    userId: number;
     course_id: number;
 }
 
@@ -94,13 +94,13 @@ export interface listCourseinstructorResponse {
 }
 
 export interface addinstructorCourse {
-    token: string;
+    userId: number;
     email_or_username: string;
     course_id: number;
 }
 
 export interface SearchInstructorInput {
-    token: string;
+    userId: number;
     query: string;
     course_id: number;
 }
@@ -145,12 +145,12 @@ export interface listinstructorCourseResponse {
 }
 
 export interface listinstructorCourse {
-    token: string;
+    userId: number;
     course_id: number;
 }
 
 export interface removeinstructorCourse {
-    token: string;
+    userId: number;
     user_id: number;
     course_id: number;
 }
@@ -161,7 +161,7 @@ export interface removeinstructorCourseResponse {
 }
 
 export interface setprimaryCourseInstructor {
-    token: string;
+    userId: number;
     user_id: number;
     course_id: number;
 }
@@ -172,12 +172,12 @@ export interface setprimaryCourseInstructorResponse {
 }
 
 export interface sendCourseForReview {
-    token: string;
+    userId: number;
     course_id: number;
 }
 
 export interface setCourseDraft {
-    token: string;
+    userId: number;
     course_id: number;
 }
 
@@ -220,7 +220,7 @@ export interface GetCourseApprovalsResponse {
 // ============================================
 
 export interface GetEnrolledStudentsInput {
-    token: string;
+    userId: number;
     course_id: number;
     page?: number;
     limit?: number;
@@ -254,7 +254,7 @@ export interface GetEnrolledStudentsResponse {
 // ============================================
 
 export interface GetQuizScoresInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     page?: number;
@@ -305,7 +305,7 @@ export interface GetQuizScoresResponse {
 // ============================================
 
 export interface GetQuizAttemptDetailInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     student_id: number;
@@ -353,7 +353,7 @@ export interface GetQuizAttemptDetailResponse {
 // ============================================
 
 export interface GetEnrolledStudentDetailInput {
-    token: string;
+    userId: number;
     course_id: number;
     student_id: number;
 }
@@ -435,7 +435,7 @@ export interface GetCourseApprovalHistoryResponse {
 }
 
 export interface CloneCourseInput {
-    token: string;
+    userId: number;
     course_id: number;
     title: MultiLanguageText;
 }
@@ -448,3 +448,14 @@ export interface CloneCourseResponse {
         title: MultiLanguageText;
     };
 }
+
+// ============================================
+// Get All Students across all instructor courses
+// ============================================
+
+export interface GetAllMyStudentsResponse {
+    code: number;
+    message: string;
+    total_students: number;
+    total_completed: number;
+}

Backend/src/types/CoursesStudent.types.ts

@@ -9,7 +9,7 @@ export type MultiLangText = MultiLanguageText;
 // ============================================
 
 export interface EnrollCourseInput {
-    token: string;
+    userId: number;
     course_id: number;
 }
 
@@ -26,7 +26,7 @@ export interface EnrollCourseResponse {
 }
 
 export interface ListEnrolledCoursesInput {
-    token: string;
+    userId: number;
     page?: number;
     limit?: number;
     status?: EnrollmentStatus;
@@ -64,7 +64,7 @@ export interface ListEnrolledCoursesResponse {
 // ============================================
 
 export interface GetCourseLearningInput {
-    token: string;
+    userId: number;
     course_id: number;
 }
 
@@ -126,7 +126,7 @@ export interface GetCourseLearningResponse {
 // ============================================
 
 export interface GetLessonContentInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
 }
@@ -204,7 +204,7 @@ export interface GetLessonContentResponse {
 // ============================================
 
 export interface CheckLessonAccessInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
 }
@@ -236,7 +236,7 @@ export interface CheckLessonAccessResponse {
 // ============================================
 
 export interface SaveVideoProgressInput {
-    token: string;
+    userId: number;
     lesson_id: number;
     video_progress_seconds: number;
     video_duration_seconds?: number;
@@ -258,7 +258,7 @@ export interface SaveVideoProgressResponse {
 }
 
 export interface GetVideoProgressInput {
-    token: string;
+    userId: number;
     lesson_id: number;
 }
 
@@ -281,7 +281,7 @@ export interface GetVideoProgressResponse {
 // ============================================
 
 export interface MarkLessonCompleteInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
 }
@@ -314,7 +314,7 @@ export interface EnrollCourseBody {
 }
 
 export interface CompleteLessonInput {
-    token: string;
+    userId: number;
     lesson_id: number;
 }
 
@@ -342,7 +342,7 @@ export interface QuizAnswerInput {
 }
 
 export interface SubmitQuizInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
     answers: QuizAnswerInput[];
@@ -384,7 +384,7 @@ export interface SubmitQuizResponse {
 // ============================================
 
 export interface GetQuizAttemptsInput {
-    token: string;
+    userId: number;
     course_id: number;
     lesson_id: number;
 }

Backend/src/types/announcements.types.ts

@@ -22,7 +22,7 @@ export interface AnnouncementAttachment {
     updated_at: Date;
 }
 
-export interface ListAnnouncementResponse{
+export interface ListAnnouncementResponse {
     code: number;
     message: string;
     data: Announcement[];
@@ -31,15 +31,15 @@ export interface ListAnnouncementResponse{
     limit: number;
 }
 
-export interface ListAnnouncementInput{
+export interface ListAnnouncementInput {
-    token: string;
+    userId: number;
     course_id: number;
     page?: number;
     limit?: number;
 }
 
-export interface CreateAnnouncementInput{
+export interface CreateAnnouncementInput {
-    token: string;
+    userId: number;
     course_id: number;
     title: MultiLanguageText;
     content: MultiLanguageText;
@@ -49,39 +49,39 @@ export interface CreateAnnouncementInput{
     files?: Express.Multer.File[];
 }
 
-export interface UploadAnnouncementAttachmentInput{
+export interface UploadAnnouncementAttachmentInput {
-    token: string;
+    userId: number;
     course_id: number;
     announcement_id: number;
     file: File;
 }
 
-export interface UploadAnnouncementAttachmentResponse{
+export interface UploadAnnouncementAttachmentResponse {
     code: number;
     message: string;
     data: AnnouncementAttachment;
 }
 
-export interface DeleteAnnouncementAttachmentInput{
+export interface DeleteAnnouncementAttachmentInput {
-    token: string;
+    userId: number;
     course_id: number;
     announcement_id: number;
     attachment_id: number;
 }
 
-export interface DeleteAnnouncementAttachmentResponse{
+export interface DeleteAnnouncementAttachmentResponse {
     code: number;
     message: string;
 }
 
-export interface CreateAnnouncementResponse{
+export interface CreateAnnouncementResponse {
     code: number;
     message: string;
     data: Announcement;
 }
 
-export interface UpdateAnnouncementInput{
+export interface UpdateAnnouncementInput {
-    token: string;
+    userId: number;
     course_id: number;
     announcement_id: number;
     title: MultiLanguageText;
@@ -92,19 +92,19 @@ export interface UpdateAnnouncementInput{
     attachments?: AnnouncementAttachment[];
 }
 
-export interface UpdateAnnouncementResponse{
+export interface UpdateAnnouncementResponse {
     code: number;
     message: string;
     data: Announcement;
 }
 
-export interface DeleteAnnouncementInput{
+export interface DeleteAnnouncementInput {
-    token: string;
+    userId: number;
     course_id: number;
     announcement_id: number;
 }
 
-export interface DeleteAnnouncementResponse{
+export interface DeleteAnnouncementResponse {
     code: number;
     message: string;
 }

Backend/src/types/auth.types.ts

@@ -28,7 +28,6 @@ export interface LoginResponse {
     data: {
         token: string;
         refreshToken: string;
-        user: UserResponse;
     };
 }
 

Backend/src/types/certificate.types.ts

@@ -3,7 +3,7 @@
 // ============================================
 
 export interface GenerateCertificateInput {
-    token: string;
+    userId: number;
     course_id: number;
 }
 
@@ -19,7 +19,7 @@ export interface GenerateCertificateResponse {
 }
 
 export interface GetCertificateInput {
-    token: string;
+    userId: number;
     course_id: number;
 }
 
@@ -37,7 +37,7 @@ export interface GetCertificateResponse {
 }
 
 export interface ListMyCertificatesInput {
-    token: string;
+    userId: number;
 }
 
 export interface ListMyCertificatesResponse {

Backend/src/validators/ChaptersLesson.validator.ts

@@ -79,7 +79,7 @@ export const UpdateLessonValidator = Joi.object({
         'number.min': 'Duration must be at least 0'
     }),
     sort_order: Joi.number().integer().min(0).optional(),
-    prerequisite_lesson_ids: Joi.array().items(Joi.number().integer().positive()).optional(),
+    prerequisite_lesson_ids: Joi.array().items(Joi.number().integer().positive()).allow(null).optional(),
     is_published: Joi.boolean().optional()
 });
 

Backend/tests/tsconfig.json

@@ -0,0 +1,14 @@
+{
+    "extends": "../tsconfig.test.json",
+    "compilerOptions": {
+        "rootDir": "..",
+        "types": [
+            "node",
+            "jest"
+        ]
+    },
+    "include": [
+        "../src/**/*",
+        "./**/*"
+    ]
+}

Backend/tests/unit/validators/AdminCourseApproval.validator.test.ts

@@ -0,0 +1,67 @@
+import {
+    ApproveCourseValidator,
+    RejectCourseValidator,
+} from '@/validators/AdminCourseApproval.validator';
+
+describe('ApproveCourseValidator', () => {
+    it('should pass with no body (comment optional)', () => {
+        const { error } = ApproveCourseValidator.validate({});
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with optional comment', () => {
+        const { error } = ApproveCourseValidator.validate({
+            comment: 'Looks great!',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail when comment exceeds 1000 characters', () => {
+        const { error } = ApproveCourseValidator.validate({
+            comment: 'a'.repeat(1001),
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/must not exceed 1000/i);
+    });
+
+    it('should pass with comment exactly 1000 characters', () => {
+        const { error } = ApproveCourseValidator.validate({
+            comment: 'a'.repeat(1000),
+        });
+        expect(error).toBeUndefined();
+    });
+});
+
+describe('RejectCourseValidator', () => {
+    it('should pass with valid rejection comment', () => {
+        const { error } = RejectCourseValidator.validate({
+            comment: 'The content is incomplete and needs more details.',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without comment', () => {
+        const { error } = RejectCourseValidator.validate({});
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Comment is required when rejecting/i);
+    });
+
+    it('should fail when comment is too short (< 10 chars)', () => {
+        const { error } = RejectCourseValidator.validate({ comment: 'Too short' });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/at least 10 characters/i);
+    });
+
+    it('should pass with exactly 10 characters', () => {
+        const { error } = RejectCourseValidator.validate({ comment: '1234567890' });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail when comment exceeds 1000 characters', () => {
+        const { error } = RejectCourseValidator.validate({
+            comment: 'a'.repeat(1001),
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/must not exceed 1000/i);
+    });
+});

Backend/tests/unit/validators/ChaptersLesson.validator.test.ts

@@ -0,0 +1,263 @@
+import {
+    CreateChapterValidator,
+    UpdateChapterValidator,
+    ReorderChapterValidator,
+    CreateLessonValidator,
+    UpdateLessonValidator,
+    ReorderLessonsValidator,
+    AddQuestionValidator,
+    UpdateQuizValidator,
+} from '@/validators/ChaptersLesson.validator';
+
+
+// ============================================================
+// Chapter Validators
+// ============================================================
+
+describe('CreateChapterValidator', () => {
+    it('should pass with valid data', () => {
+        const { error } = CreateChapterValidator.validate({
+            title: { th: 'บทที่ 1', en: 'Chapter 1' },
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with optional fields', () => {
+        const { error } = CreateChapterValidator.validate({
+            title: { th: 'บทที่ 1', en: 'Chapter 1' },
+            description: { th: 'คำอธิบาย', en: 'Description' },
+            sort_order: 0,
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail if title is missing', () => {
+        const { error } = CreateChapterValidator.validate({});
+        expect(error).toBeDefined();
+    });
+
+    it('should fail if title.th is missing', () => {
+        const { error } = CreateChapterValidator.validate({
+            title: { en: 'Chapter 1' },
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail if title.en is missing', () => {
+        const { error } = CreateChapterValidator.validate({
+            title: { th: 'บทที่ 1' },
+        });
+        expect(error).toBeDefined();
+    });
+});
+
+describe('UpdateChapterValidator', () => {
+    it('should pass with empty object (all fields optional)', () => {
+        const { error } = UpdateChapterValidator.validate({});
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with partial fields', () => {
+        const { error } = UpdateChapterValidator.validate({
+            is_published: true,
+        });
+        expect(error).toBeUndefined();
+    });
+});
+
+describe('ReorderChapterValidator', () => {
+    it('should pass with valid sort_order', () => {
+        const { error } = ReorderChapterValidator.validate({ sort_order: 0 });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without sort_order', () => {
+        const { error } = ReorderChapterValidator.validate({});
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Sort order is required/i);
+    });
+
+    it('should fail with negative sort_order', () => {
+        const { error } = ReorderChapterValidator.validate({ sort_order: -1 });
+        expect(error).toBeDefined();
+    });
+});
+
+// ============================================================
+// Lesson Validators
+// ============================================================
+
+describe('CreateLessonValidator', () => {
+    it('should pass with VIDEO type', () => {
+        const { error } = CreateLessonValidator.validate({
+            title: { th: 'บทเรียน 1', en: 'Lesson 1' },
+            type: 'VIDEO',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with QUIZ type', () => {
+        const { error } = CreateLessonValidator.validate({
+            title: { th: 'แบบทดสอบ', en: 'Quiz' },
+            type: 'QUIZ',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail with invalid type', () => {
+        const { error } = CreateLessonValidator.validate({
+            title: { th: 'บทเรียน', en: 'Lesson' },
+            type: 'DOCUMENT',
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail without title', () => {
+        const { error } = CreateLessonValidator.validate({ type: 'VIDEO' });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail without type', () => {
+        const { error } = CreateLessonValidator.validate({
+            title: { th: 'บทเรียน', en: 'Lesson' },
+        });
+        expect(error).toBeDefined();
+    });
+});
+
+describe('UpdateLessonValidator — prerequisite_lesson_ids', () => {
+    it('should pass with valid array of ids', () => {
+        const { error } = UpdateLessonValidator.validate({
+            prerequisite_lesson_ids: [1, 2, 3],
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with null (clear prerequisites)', () => {
+        const { error } = UpdateLessonValidator.validate({
+            prerequisite_lesson_ids: null,
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with empty array (clear prerequisites)', () => {
+        const { error } = UpdateLessonValidator.validate({
+            prerequisite_lesson_ids: [],
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass without the field (no change)', () => {
+        const { error } = UpdateLessonValidator.validate({});
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail with non-integer ids', () => {
+        const { error } = UpdateLessonValidator.validate({
+            prerequisite_lesson_ids: [1.5],
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail with negative ids', () => {
+        const { error } = UpdateLessonValidator.validate({
+            prerequisite_lesson_ids: [-1],
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail with string ids', () => {
+        const { error } = UpdateLessonValidator.validate({
+            prerequisite_lesson_ids: ['abc'],
+        });
+        expect(error).toBeDefined();
+    });
+});
+
+describe('ReorderLessonsValidator', () => {
+    it('should pass with valid data', () => {
+        const { error } = ReorderLessonsValidator.validate({
+            lesson_id: 1,
+            sort_order: 0,
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without lesson_id', () => {
+        const { error } = ReorderLessonsValidator.validate({ sort_order: 0 });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail without sort_order', () => {
+        const { error } = ReorderLessonsValidator.validate({ lesson_id: 1 });
+        expect(error).toBeDefined();
+    });
+});
+
+// ============================================================
+// Quiz Validators
+// ============================================================
+
+describe('AddQuestionValidator', () => {
+    it('should pass with MULTIPLE_CHOICE type + choices', () => {
+        const { error } = AddQuestionValidator.validate({
+            question: { th: 'ข้อที่ 1 คืออะไร?', en: 'What is question 1?' },
+            question_type: 'MULTIPLE_CHOICE',
+            choices: [
+                { text: { th: 'ก', en: 'A' }, is_correct: true },
+                { text: { th: 'ข', en: 'B' }, is_correct: false },
+            ],
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with TRUE_FALSE type without choices', () => {
+        const { error } = AddQuestionValidator.validate({
+            question: { th: 'ถูกหรือผิด?', en: 'True or False?' },
+            question_type: 'TRUE_FALSE',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail with invalid question_type', () => {
+        const { error } = AddQuestionValidator.validate({
+            question: { th: 'คำถาม', en: 'Question' },
+            question_type: 'ESSAY',
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail without question', () => {
+        const { error } = AddQuestionValidator.validate({
+            question_type: 'TRUE_FALSE',
+        });
+        expect(error).toBeDefined();
+    });
+});
+
+describe('UpdateQuizValidator', () => {
+    it('should pass with empty object (all optional)', () => {
+        const { error } = UpdateQuizValidator.validate({});
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with valid passing_score', () => {
+        const { error } = UpdateQuizValidator.validate({ passing_score: 70 });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail with passing_score > 100', () => {
+        const { error } = UpdateQuizValidator.validate({ passing_score: 101 });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail with passing_score < 0', () => {
+        const { error } = UpdateQuizValidator.validate({ passing_score: -1 });
+        expect(error).toBeDefined();
+    });
+
+    it('should pass with time_limit 0 (no limit)', () => {
+        const { error } = UpdateQuizValidator.validate({ time_limit: 0 });
+        expect(error).toBeUndefined();
+    });
+});

Backend/tests/unit/validators/CoursesInstructor.validator.test.ts

@@ -0,0 +1,150 @@
+import {
+    CreateCourseValidator,
+    UpdateCourseValidator,
+    CloneCourseValidator,
+    addInstructorCourseValidator,
+} from '@/validators/CoursesInstructor.validator';
+
+// ============================================================
+// addInstructorCourseValidator
+// ============================================================
+
+describe('addInstructorCourseValidator', () => {
+    it('should pass with valid user_id and course_id', () => {
+        const { error } = addInstructorCourseValidator.validate({
+            user_id: 1,
+            course_id: 2,
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without user_id', () => {
+        const { error } = addInstructorCourseValidator.validate({ course_id: 2 });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail without course_id', () => {
+        const { error } = addInstructorCourseValidator.validate({ user_id: 1 });
+        expect(error).toBeDefined();
+    });
+});
+
+// ============================================================
+// CreateCourseValidator
+// ============================================================
+
+describe('CreateCourseValidator', () => {
+    const validPayload = {
+        category_id: 1,
+        title: { th: 'คอร์สทดสอบ', en: 'Test Course' },
+        slug: 'test-course',
+        description: { th: 'คำอธิบาย', en: 'Description' },
+        price: 500,
+        is_free: false,
+        have_certificate: true,
+    };
+
+    it('should pass with all required fields', () => {
+        const { error } = CreateCourseValidator.validate(validPayload);
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail if title.th is missing', () => {
+        const { error } = CreateCourseValidator.validate({
+            ...validPayload,
+            title: { en: 'Test Course' },
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail if slug is missing', () => {
+        const { error } = CreateCourseValidator.validate({
+            ...validPayload,
+            slug: undefined,
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail if price is missing', () => {
+        const { error } = CreateCourseValidator.validate({
+            ...validPayload,
+            price: undefined,
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail if is_free is missing', () => {
+        const { error } = CreateCourseValidator.validate({
+            ...validPayload,
+            is_free: undefined,
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should allow price = 0 (free course)', () => {
+        const { error } = CreateCourseValidator.validate({
+            ...validPayload,
+            price: 0,
+            is_free: true,
+        });
+        expect(error).toBeUndefined();
+    });
+});
+
+// ============================================================
+// UpdateCourseValidator
+// ============================================================
+
+describe('UpdateCourseValidator', () => {
+    it('should pass with empty object (all optional)', () => {
+        const { error } = UpdateCourseValidator.validate({});
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with partial update', () => {
+        const { error } = UpdateCourseValidator.validate({ price: 999 });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with title partial update (th only)', () => {
+        const { error } = UpdateCourseValidator.validate({
+            title: { th: 'ชื่อใหม่' },
+        });
+        expect(error).toBeUndefined();
+    });
+});
+
+// ============================================================
+// CloneCourseValidator
+// ============================================================
+
+describe('CloneCourseValidator', () => {
+    it('should pass with valid title', () => {
+        const { error } = CloneCourseValidator.validate({
+            title: { th: 'คอร์ส Copy', en: 'Course Copy' },
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without title.th', () => {
+        const { error } = CloneCourseValidator.validate({
+            title: { en: 'Course Copy' },
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Thai title is required/i);
+    });
+
+    it('should fail without title.en', () => {
+        const { error } = CloneCourseValidator.validate({
+            title: { th: 'คอร์ส Copy' },
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/English title is required/i);
+    });
+
+    it('should fail without title entirely', () => {
+        const { error } = CloneCourseValidator.validate({});
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Title is required/i);
+    });
+});

Backend/tests/unit/validators/CoursesStudent.validator.test.ts

@@ -0,0 +1,96 @@
+import {
+    SaveVideoProgressValidator,
+    SubmitQuizValidator,
+} from '@/validators/CoursesStudent.validator';
+
+describe('SaveVideoProgressValidator', () => {
+    it('should pass with required field only', () => {
+        const { error } = SaveVideoProgressValidator.validate({
+            video_progress_seconds: 60,
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with all fields', () => {
+        const { error } = SaveVideoProgressValidator.validate({
+            video_progress_seconds: 120,
+            video_duration_seconds: 600,
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with progress = 0 (start of video)', () => {
+        const { error } = SaveVideoProgressValidator.validate({
+            video_progress_seconds: 0,
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without video_progress_seconds', () => {
+        const { error } = SaveVideoProgressValidator.validate({});
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Video progress seconds is required/i);
+    });
+
+    it('should fail with negative progress', () => {
+        const { error } = SaveVideoProgressValidator.validate({
+            video_progress_seconds: -1,
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/at least 0/i);
+    });
+
+    it('should fail with negative video duration', () => {
+        const { error } = SaveVideoProgressValidator.validate({
+            video_progress_seconds: 10,
+            video_duration_seconds: -1,
+        });
+        expect(error).toBeDefined();
+    });
+});
+
+describe('SubmitQuizValidator', () => {
+    const validAnswer = { question_id: 1, choice_id: 2 };
+
+    it('should pass with valid answers', () => {
+        const { error } = SubmitQuizValidator.validate({
+            answers: [validAnswer, { question_id: 2, choice_id: 5 }],
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without answers', () => {
+        const { error } = SubmitQuizValidator.validate({});
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Answers are required/i);
+    });
+
+    it('should fail with empty answers array', () => {
+        const { error } = SubmitQuizValidator.validate({ answers: [] });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/At least one answer/i);
+    });
+
+    it('should fail if question_id is missing in an answer', () => {
+        const { error } = SubmitQuizValidator.validate({
+            answers: [{ choice_id: 2 }],
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Question ID is required/i);
+    });
+
+    it('should fail if choice_id is missing in an answer', () => {
+        const { error } = SubmitQuizValidator.validate({
+            answers: [{ question_id: 1 }],
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Choice ID is required/i);
+    });
+
+    it('should fail if question_id is not a positive integer', () => {
+        const { error } = SubmitQuizValidator.validate({
+            answers: [{ question_id: -1, choice_id: 1 }],
+        });
+        expect(error).toBeDefined();
+    });
+});

Backend/tests/unit/validators/Lessons.validator.test.ts

@@ -0,0 +1,45 @@
+import { SetYouTubeVideoValidator } from '@/validators/Lessons.validator';
+
+describe('SetYouTubeVideoValidator', () => {
+    it('should pass with valid youtube_video_id and video_title', () => {
+        const { error } = SetYouTubeVideoValidator.validate({
+            youtube_video_id: 'dQw4w9WgXcQ',
+            video_title: 'Introduction to TypeScript',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without youtube_video_id', () => {
+        const { error } = SetYouTubeVideoValidator.validate({
+            video_title: 'Intro to TS',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/YouTube video ID is required/i);
+    });
+
+    it('should fail with empty youtube_video_id string', () => {
+        const { error } = SetYouTubeVideoValidator.validate({
+            youtube_video_id: '',
+            video_title: 'Intro to TS',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/cannot be empty/i);
+    });
+
+    it('should fail without video_title', () => {
+        const { error } = SetYouTubeVideoValidator.validate({
+            youtube_video_id: 'dQw4w9WgXcQ',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Video title is required/i);
+    });
+
+    it('should fail with empty video_title string', () => {
+        const { error } = SetYouTubeVideoValidator.validate({
+            youtube_video_id: 'dQw4w9WgXcQ',
+            video_title: '',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/cannot be empty/i);
+    });
+});

Backend/tests/unit/validators/announcements.validator.test.ts

@@ -0,0 +1,115 @@
+import {
+    CreateAnnouncementValidator,
+    UpdateAnnouncementValidator,
+} from '@/validators/announcements.validator';
+
+describe('CreateAnnouncementValidator', () => {
+    const validPayload = {
+        title: { th: 'ประกาศใหม่', en: 'New Announcement' },
+        content: { th: 'เนื้อหา', en: 'Content' },
+        status: 'DRAFT',
+        is_pinned: false,
+    };
+
+    it('should pass with all required fields', () => {
+        const { error } = CreateAnnouncementValidator.validate(validPayload);
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with optional published_at as ISO date', () => {
+        const { error } = CreateAnnouncementValidator.validate({
+            ...validPayload,
+            published_at: '2026-03-01T00:00:00.000Z',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail with invalid published_at format', () => {
+        const { error } = CreateAnnouncementValidator.validate({
+            ...validPayload,
+            published_at: '01-03-2026',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/ISO date/i);
+    });
+
+    it('should fail with invalid status', () => {
+        const { error } = CreateAnnouncementValidator.validate({
+            ...validPayload,
+            status: 'HIDDEN',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/DRAFT, PUBLISHED, ARCHIVED/i);
+    });
+
+    it('should pass with PUBLISHED status', () => {
+        const { error } = CreateAnnouncementValidator.validate({
+            ...validPayload,
+            status: 'PUBLISHED',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with ARCHIVED status', () => {
+        const { error } = CreateAnnouncementValidator.validate({
+            ...validPayload,
+            status: 'ARCHIVED',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without title', () => {
+        const { error } = CreateAnnouncementValidator.validate({
+            ...validPayload,
+            title: undefined,
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Title is required/i);
+    });
+
+    it('should fail without content', () => {
+        const { error } = CreateAnnouncementValidator.validate({
+            ...validPayload,
+            content: undefined,
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Content is required/i);
+    });
+
+    it('should fail without is_pinned', () => {
+        const { error } = CreateAnnouncementValidator.validate({
+            ...validPayload,
+            is_pinned: undefined,
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/is_pinned is required/i);
+    });
+});
+
+describe('UpdateAnnouncementValidator', () => {
+    it('should pass with empty object (all optional)', () => {
+        const { error } = UpdateAnnouncementValidator.validate({});
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with partial update', () => {
+        const { error } = UpdateAnnouncementValidator.validate({
+            status: 'PUBLISHED',
+            is_pinned: true,
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail with invalid status', () => {
+        const { error } = UpdateAnnouncementValidator.validate({ status: 'DELETED' });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail with invalid published_at format', () => {
+        const { error } = UpdateAnnouncementValidator.validate({
+            published_at: 'not-a-date',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/ISO date/i);
+    });
+});

Backend/tests/unit/validators/auth.validator.test.ts

@@ -0,0 +1,246 @@
+import {
+    loginSchema,
+    registerSchema,
+    refreshTokenSchema,
+    resetPasswordSchema,
+    changePasswordSchema,
+    resetRequestSchema,
+} from '@/validators/auth.validator';
+
+// ============================================================
+// loginSchema
+// ============================================================
+
+describe('loginSchema', () => {
+    it('should pass with valid email and password', () => {
+        const { error } = loginSchema.validate({
+            email: 'user@example.com',
+            password: 'password123',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail with invalid email format', () => {
+        const { error } = loginSchema.validate({
+            email: 'not-an-email',
+            password: 'password123',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/valid email/i);
+    });
+
+    it('should fail without email', () => {
+        const { error } = loginSchema.validate({ password: 'password123' });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Email is required/i);
+    });
+
+    it('should fail without password', () => {
+        const { error } = loginSchema.validate({ email: 'user@example.com' });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Password is required/i);
+    });
+
+    it('should fail with password shorter than 6 characters', () => {
+        const { error } = loginSchema.validate({
+            email: 'user@example.com',
+            password: '12345',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/at least 6 characters/i);
+    });
+});
+
+// ============================================================
+// registerSchema
+// ============================================================
+
+describe('registerSchema', () => {
+    const validPayload = {
+        username: 'john_doe',
+        email: 'john@example.com',
+        password: 'securepass',
+        first_name: 'John',
+        last_name: 'Doe',
+        phone: '0812345678',
+    };
+
+    it('should pass with all required fields', () => {
+        const { error } = registerSchema.validate(validPayload);
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with optional prefix', () => {
+        const { error } = registerSchema.validate({
+            ...validPayload,
+            prefix: { th: 'นาย', en: 'Mr.' },
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail if username has invalid characters', () => {
+        const { error } = registerSchema.validate({
+            ...validPayload,
+            username: 'john doe!',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/letters, numbers, and underscores/i);
+    });
+
+    it('should fail if username is too short (< 3 chars)', () => {
+        const { error } = registerSchema.validate({
+            ...validPayload,
+            username: 'ab',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/at least 3 characters/i);
+    });
+
+    it('should fail if username is too long (> 50 chars)', () => {
+        const { error } = registerSchema.validate({
+            ...validPayload,
+            username: 'a'.repeat(51),
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/not exceed 50 characters/i);
+    });
+
+    it('should fail with invalid email', () => {
+        const { error } = registerSchema.validate({
+            ...validPayload,
+            email: 'bad-email',
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail if phone is too short (< 10 chars)', () => {
+        const { error } = registerSchema.validate({
+            ...validPayload,
+            phone: '081234',
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail without first_name', () => {
+        const { error } = registerSchema.validate({
+            ...validPayload,
+            first_name: undefined,
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/First name is required/i);
+    });
+
+    it('should fail without last_name', () => {
+        const { error } = registerSchema.validate({
+            ...validPayload,
+            last_name: undefined,
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Last name is required/i);
+    });
+});
+
+// ============================================================
+// refreshTokenSchema
+// ============================================================
+
+describe('refreshTokenSchema', () => {
+    it('should pass with a valid refreshToken', () => {
+        const { error } = refreshTokenSchema.validate({
+            refreshToken: 'some-refresh-token-string',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without refreshToken', () => {
+        const { error } = refreshTokenSchema.validate({});
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Refresh token is required/i);
+    });
+});
+
+// ============================================================
+// resetPasswordSchema
+// ============================================================
+
+describe('resetPasswordSchema', () => {
+    it('should pass with valid token and password', () => {
+        const { error } = resetPasswordSchema.validate({
+            token: 'reset-token-abc',
+            password: 'newpassword',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without token', () => {
+        const { error } = resetPasswordSchema.validate({ password: 'newpassword' });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Reset token is required/i);
+    });
+
+    it('should fail with password too short', () => {
+        const { error } = resetPasswordSchema.validate({
+            token: 'abc',
+            password: '12345',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/at least 6 characters/i);
+    });
+
+    it('should fail with password too long (> 100 chars)', () => {
+        const { error } = resetPasswordSchema.validate({
+            token: 'abc',
+            password: 'a'.repeat(101),
+        });
+        expect(error).toBeDefined();
+    });
+});
+
+// ============================================================
+// changePasswordSchema (auth)
+// ============================================================
+
+describe('changePasswordSchema (auth.validator)', () => {
+    it('should pass with valid old and new passwords', () => {
+        const { error } = changePasswordSchema.validate({
+            oldPassword: 'oldpass123',
+            newPassword: 'newpass456',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without oldPassword', () => {
+        const { error } = changePasswordSchema.validate({ newPassword: 'newpass456' });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Password is required/i);
+    });
+
+    it('should fail without newPassword', () => {
+        const { error } = changePasswordSchema.validate({ oldPassword: 'oldpass123' });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Password is required/i);
+    });
+});
+
+// ============================================================
+// resetRequestSchema
+// ============================================================
+
+describe('resetRequestSchema', () => {
+    it('should pass with valid email', () => {
+        const { error } = resetRequestSchema.validate({ email: 'user@example.com' });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without email', () => {
+        const { error } = resetRequestSchema.validate({});
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Email is required/i);
+    });
+
+    it('should fail with invalid email', () => {
+        const { error } = resetRequestSchema.validate({ email: 'not-email' });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/valid email/i);
+    });
+});

Backend/tests/unit/validators/categories.validator.test.ts

@@ -0,0 +1,121 @@
+import {
+    CreateCategoryValidator,
+    UpdateCategoryValidator,
+} from '@/validators/categories.validator';
+
+describe('CreateCategoryValidator', () => {
+    const validPayload = {
+        name: { th: 'การพัฒนาเว็บ', en: 'Web Development' },
+        slug: 'web-development',
+        description: { th: 'หมวดหมู่การพัฒนาเว็บ', en: 'Web development category' },
+    };
+
+    it('should pass with all required fields', () => {
+        const { error } = CreateCategoryValidator.validate(validPayload);
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with optional created_by', () => {
+        const { error } = CreateCategoryValidator.validate({
+            ...validPayload,
+            created_by: 1,
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without name', () => {
+        const { error } = CreateCategoryValidator.validate({
+            ...validPayload,
+            name: undefined,
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Name is required/i);
+    });
+
+    it('should fail without name.th', () => {
+        const { error } = CreateCategoryValidator.validate({
+            ...validPayload,
+            name: { en: 'Web Development' },
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Thai name is required/i);
+    });
+
+    it('should fail without slug', () => {
+        const { error } = CreateCategoryValidator.validate({
+            ...validPayload,
+            slug: undefined,
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Slug is required/i);
+    });
+
+    it('should fail with invalid slug format (uppercase)', () => {
+        const { error } = CreateCategoryValidator.validate({
+            ...validPayload,
+            slug: 'Web-Development',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/lowercase with hyphens/i);
+    });
+
+    it('should fail with invalid slug format (spaces)', () => {
+        const { error } = CreateCategoryValidator.validate({
+            ...validPayload,
+            slug: 'web development',
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should pass with valid slug formats', () => {
+        const slugs = ['web', 'web-dev', 'web-development-101'];
+        for (const slug of slugs) {
+            const { error } = CreateCategoryValidator.validate({
+                ...validPayload,
+                slug,
+            });
+            expect(error).toBeUndefined();
+        }
+    });
+
+    it('should fail without description', () => {
+        const { error } = CreateCategoryValidator.validate({
+            ...validPayload,
+            description: undefined,
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Description is required/i);
+    });
+});
+
+describe('UpdateCategoryValidator', () => {
+    it('should pass with only required id', () => {
+        const { error } = UpdateCategoryValidator.validate({ id: 1 });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with all optional fields', () => {
+        const { error } = UpdateCategoryValidator.validate({
+            id: 1,
+            name: { th: 'ใหม่', en: 'New' },
+            slug: 'new-category',
+            description: { th: 'คำอธิบาย', en: 'Description' },
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without id', () => {
+        const { error } = UpdateCategoryValidator.validate({ name: { th: 'ใหม่', en: 'New' } });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Category ID is required/i);
+    });
+
+    it('should fail with invalid slug format', () => {
+        const { error } = UpdateCategoryValidator.validate({
+            id: 1,
+            slug: 'Invalid Slug!',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/lowercase with hyphens/i);
+    });
+});

Backend/tests/unit/validators/user.validator.test.ts

@@ -0,0 +1,100 @@
+import {
+    profileUpdateSchema,
+    changePasswordSchema,
+} from '@/validators/user.validator';
+
+describe('profileUpdateSchema', () => {
+    it('should pass with empty object (all optional)', () => {
+        const { error } = profileUpdateSchema.validate({});
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with all fields', () => {
+        const { error } = profileUpdateSchema.validate({
+            prefix: { th: 'นาย', en: 'Mr.' },
+            first_name: 'John',
+            last_name: 'Doe',
+            phone: '0812345678',
+            avatar_url: 'https://example.com/avatar.jpg',
+            birth_date: new Date('1990-01-01'),
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should pass with partial update (first_name only)', () => {
+        const { error } = profileUpdateSchema.validate({ first_name: 'Jane' });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail if first_name is empty string', () => {
+        const { error } = profileUpdateSchema.validate({ first_name: '' });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail if first_name exceeds 100 characters', () => {
+        const { error } = profileUpdateSchema.validate({ first_name: 'a'.repeat(101) });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail if phone is too short (< 10 chars)', () => {
+        const { error } = profileUpdateSchema.validate({ phone: '081234' });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail if phone exceeds 15 characters', () => {
+        const { error } = profileUpdateSchema.validate({ phone: '1'.repeat(16) });
+        expect(error).toBeDefined();
+    });
+
+    it('should pass with valid birth_date', () => {
+        const { error } = profileUpdateSchema.validate({ birth_date: new Date('2000-06-15') });
+        expect(error).toBeUndefined();
+    });
+});
+
+describe('changePasswordSchema (user.validator)', () => {
+    it('should pass with valid old and new passwords', () => {
+        const { error } = changePasswordSchema.validate({
+            oldPassword: 'oldpass123',
+            newPassword: 'newpass456',
+        });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without oldPassword', () => {
+        const { error } = changePasswordSchema.validate({ newPassword: 'newpass456' });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Old password is required/i);
+    });
+
+    it('should fail without newPassword', () => {
+        const { error } = changePasswordSchema.validate({ oldPassword: 'oldpass123' });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/New password is required/i);
+    });
+
+    it('should fail if oldPassword is shorter than 6 chars', () => {
+        const { error } = changePasswordSchema.validate({
+            oldPassword: '12345',
+            newPassword: 'newpass456',
+        });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/at least 6 characters/i);
+    });
+
+    it('should fail if newPassword is shorter than 6 chars', () => {
+        const { error } = changePasswordSchema.validate({
+            oldPassword: 'oldpass123',
+            newPassword: '123',
+        });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail if oldPassword exceeds 100 characters', () => {
+        const { error } = changePasswordSchema.validate({
+            oldPassword: 'a'.repeat(101),
+            newPassword: 'newpass456',
+        });
+        expect(error).toBeDefined();
+    });
+});

Backend/tests/unit/validators/usermanagement.validator.test.ts

@@ -0,0 +1,59 @@
+import {
+    getUserByIdValidator,
+    updateUserRoleValidator,
+} from '@/validators/usermanagement.validator';
+
+describe('getUserByIdValidator', () => {
+    it('should pass with valid id', () => {
+        const { error } = getUserByIdValidator.validate({ id: 1 });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without id', () => {
+        const { error } = getUserByIdValidator.validate({});
+        expect(error).toBeDefined();
+    });
+
+    it('should fail with non-numeric id', () => {
+        const { error } = getUserByIdValidator.validate({ id: 'abc' });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/ID must be a number/i);
+    });
+
+    it('should pass with id = 0', () => {
+        // Joi number() allows 0 by default unless positive() is specified
+        const { error } = getUserByIdValidator.validate({ id: 0 });
+        expect(error).toBeUndefined();
+    });
+});
+
+describe('updateUserRoleValidator', () => {
+    it('should pass with valid id and role_id', () => {
+        const { error } = updateUserRoleValidator.validate({ id: 1, role_id: 2 });
+        expect(error).toBeUndefined();
+    });
+
+    it('should fail without id', () => {
+        const { error } = updateUserRoleValidator.validate({ role_id: 2 });
+        expect(error).toBeDefined();
+    });
+
+    it('should fail without role_id', () => {
+        const { error } = updateUserRoleValidator.validate({ id: 1 });
+        expect(error).toBeDefined();
+        // Joi uses field name in message when custom messages don't match
+        expect(error?.details[0].message).toContain('role_id');
+    });
+
+    it('should fail with non-numeric role_id', () => {
+        const { error } = updateUserRoleValidator.validate({ id: 1, role_id: 'admin' });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/Role ID must be a number/i);
+    });
+
+    it('should fail with non-numeric id', () => {
+        const { error } = updateUserRoleValidator.validate({ id: 'abc', role_id: 1 });
+        expect(error).toBeDefined();
+        expect(error?.details[0].message).toMatch(/ID must be a number/i);
+    });
+});

Backend/tsconfig.test.json

@@ -0,0 +1,20 @@
+{
+    "extends": "./tsconfig.json",
+    "compilerOptions": {
+        "rootDir": ".",
+        "baseUrl": ".",
+        "paths": {
+            "@/*": [
+                "src/*"
+            ]
+        },
+        "types": [
+            "node",
+            "jest"
+        ]
+    },
+    "include": [
+        "src/**/*",
+        "tests/**/*"
+    ]
+}

Frontend-Learner/.nuxtrc

@@ -0,0 +1 @@
+setups.@nuxt/test-utils="4.0.0"

Frontend-Learner/Dockerfile

@@ -7,8 +7,8 @@ WORKDIR /app
 # คัดลอกไฟล์จัดการ dependencies
 COPY package*.json ./
 
-# ติดตั้ง dependencies (ใช้ npm ci เพื่อความแม่นยำของเวอร์ชัน)
+# ติดตั้ง dependencies
-RUN npm ci
+RUN npm install
 
 # คัดลอกไฟล์ทั้งหมดในโปรเจกต์
 COPY . .

Frontend-Learner/app.vue

@@ -27,8 +27,8 @@ onMounted(() => {
 </script>
 
 <template>
-  <!-- แสดง Loader ระหว่างเปลี่ยนหน้า หรือโหลดข้อมูล -->
+  <!-- แสดงแถบโหลดด้านบนจอ (Progress Bar) แทนการโหลดเต็มหน้าจอ -->
-  <GlobalLoader />
+  <NuxtLoadingIndicator color="#2563EB" :height="4" />
   
   <!-- NuxtLayout: แสดง Layout ที่กำหนดในแต่ละเพจ (default: layouts/default.vue) -->
   <NuxtLayout>

Frontend-Learner/components/classroom/AnnouncementModal.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 /**
  * @file AnnouncementModal.vue
- * @description Modal component to display course announcements
+ * @description คอมโพเนนต์ Modal สำหรับแสดงประกาศของคอร์สเรียน (Modal component to display course announcements)
  */
 
 const props = defineProps<{
@@ -15,7 +15,7 @@ const emit = defineEmits<{
 
 const { locale, t } = useI18n()
 
-// Helper for localization
+// ตัวช่วยจัดการข้อความหลายภาษา (Helper for localization)
 const getLocalizedText = (text: any) => {
   if (!text) return ''
   if (typeof text === 'string') return text
@@ -49,7 +49,7 @@ const getLocalizedText = (text: any) => {
                         class="p-5 rounded-2xl bg-white dark:bg-slate-800 shadow-sm border border-gray-200 dark:border-white/5 transition-all hover:shadow-md relative overflow-hidden group"
                         :class="{'ring-2 ring-orange-200 dark:ring-orange-900/40 !bg-orange-50/50 dark:!bg-orange-900/20': ann.is_pinned}"
                      >
-                        <!-- Pinned Banner -->
+                        <!-- ป้ายกำกับสำหรับข้อความที่ปักหมุดไว้ (Pinned Banner) -->
                         <div v-if="ann.is_pinned" class="absolute top-0 right-0 p-3">
                             <q-icon name="push_pin" color="orange" size="18px" class="transform rotate-45" />
                         </div>

Frontend-Learner/components/classroom/CurriculumSidebar.vue

@@ -1,12 +1,12 @@
 <script setup lang="ts">
 /**
  * @file CurriculumSidebar.vue
- * @description Sidebar Component for displaying course curriculum (Chapters & Lessons)
+ * @description คอมโพเนนต์แถบเมนูด้านข้างสำหรับแสดงหลักสูตรของคอร์สเรียน (บทเรียน & ตอนต่างๆ)
- * Handles lesson navigation, locked status display, and unread announcement badge.
+ * จัดการการนำทางไปยังบทเรียน, แสดงสถานะการล็อค, และแจ้งเตือนประกาศที่ยังไม่ได้อ่าน
  */
 
 const props = defineProps<{
-  modelValue: boolean; // Sidebar open state (v-model)
+  modelValue: boolean; // สถานะการเปิด/ปิดของ Sidebar (Sidebar open state - v-model)
   courseData: any;
   currentLessonId?: number;
   isLoading: boolean;
@@ -21,10 +21,10 @@ const emit = defineEmits<{
 
 const { locale } = useI18n()
 
-// State for expansion items
+// สถานะของส่วนที่ขยายได้ (State for expansion items)
 const chapterOpenState = ref<Record<string, boolean>>({})
 
-// Helper for localization
+// ตัวช่วยจัดการข้อความหลายภาษา (Helper for localization)
 const getLocalizedText = (text: any) => {
   if (!text) return ''
   if (typeof text === 'string') return text
@@ -34,13 +34,13 @@ const getLocalizedText = (text: any) => {
   return text[currentLocale] || text.th || text.en || ''
 }
 
-// Helper: Check if lesson is completed
+// ตัวช่วยตรวจสอบว่าบทเรียนเรียนจบหรือยัง (Helper: Check if lesson is completed)
 const isLessonCompleted = (lesson: any) => {
     return lesson.is_completed === true || lesson.progress?.is_completed === true
 }
 
-// Reactive Chapter Completion Status
+// ตรวจสอบสถานะการสำเร็จของบท (Reactive Chapter Completion Status)
-// Computes a map of chapterId -> boolean (true if all lessons are completed)
+// คำนวณเป็น Map ของ chapterId -> boolean (true ถ้าทุกบทเรียนย่อยเรียนจบแล้ว)
 const chapterCompletionStatus = computed(() => {
     const status: Record<string, boolean> = {}
     if (!props.courseData || !props.courseData.chapters) return status
@@ -55,7 +55,7 @@ const chapterCompletionStatus = computed(() => {
     return status
 })
 
-// Local Progress Calculation
+// คำนวณความคืบหน้าแบบ Local (Local Progress Calculation)
 const progressPercentage = computed(() => {
   if (!props.courseData || !props.courseData.chapters) return 0
   let total = 0
@@ -69,7 +69,7 @@ const progressPercentage = computed(() => {
   return total > 0 ? Math.round((completed / total) * 100) : 0
 })
 
-// Auto-expand chapter containing current lesson
+// ขยายบทเรียนปัจจุบันอัตโนมัติ (Auto-expand chapter containing current lesson)
 watch(() => props.currentLessonId, (newId) => {
     if (newId && props.courseData?.chapters) {
         props.courseData.chapters.forEach((chapter: any) => {
@@ -81,7 +81,7 @@ watch(() => props.currentLessonId, (newId) => {
     }
 }, { immediate: true })
 
-// Initialize all chapters as open by default on load
+// ตั้งค่าเริ่มต้นให้ทุกบทเรียนเปิดอยู่เมื่อโหลด (Initialize all chapters as open by default on load)
 watch(() => props.courseData, (newData) => {
     if (newData?.chapters) {
         newData.chapters.forEach((chapter: any) => {
@@ -104,10 +104,10 @@ watch(() => props.courseData, (newData) => {
       :breakpoint="1024"
       class="bg-slate-50 dark:!bg-slate-900 shadow-xl"
     >
-      <!-- Main Container: Enforce Column Layout and Full Width -->
+      <!-- คอนเทนเนอร์หลักบังคับใช้ความกว้างเต็มที่ (Main Container: Enforce Column Layout and Full Width) -->
       <div v-if="courseData" class="flex flex-col w-full h-full overflow-hidden text-slate-900 dark:!text-white relative bg-slate-50 dark:!bg-slate-900">
         
-        <!-- 1. Header Section (Fixed at Top) -->
+        <!-- 1. ส่วนหัว ด้านบนคงที่ (Header Section - Fixed at Top) -->
         <div class="flex-none p-5 border-b border-slate-200 dark:border-white/10 bg-white dark:!bg-slate-900 z-10 w-full">
            <h2 class="text-sm font-bold mb-4 line-clamp-2 leading-snug block w-full text-slate-900 dark:!text-white">{{ getLocalizedText(courseData.course.title) }}</h2>
            
@@ -123,11 +123,11 @@ watch(() => props.courseData, (newData) => {
           </div>
         </div>
 
-        <!-- 2. Curriculum List (Scrollable Area) -->
+        <!-- 2. รายการหลักสูตร พื้นที่เลื่อนได้ (Curriculum List - Scrollable Area) -->
          <div class="flex-1 overflow-y-auto bg-slate-50 dark:!bg-slate-900 w-full p-4 space-y-3">
              <q-list class="block w-full">
                 <div v-for="(chapter, idx) in courseData.chapters" :key="chapter.id" class="block w-full mb-3">
-                    <!-- Chapter Accordion -->
+                    <!-- กล่องข้อมูลของบท (Chapter Accordion) -->
                     <q-expansion-item
                         v-model="chapterOpenState[chapter.id]"
                         class="bg-white dark:!bg-slate-800 rounded-xl overflow-hidden shadow-sm border border-slate-200 dark:border-slate-700 w-full"
@@ -137,7 +137,7 @@ watch(() => props.courseData, (newData) => {
                         <template v-slot:header>
                             <div class="flex items-center w-full py-3 text-slate-900 dark:!text-white">
                                 <div class="mr-3 flex-shrink-0">
-                                    <!-- Chapter Indicator (Check or Number) -->
+                                    <!-- ตัวบ่งชี้บทเรียน เครื่องหมายถูกหรือตัวเลข (Chapter Indicator - Check or Number) -->
                                     <div class="w-7 h-7 rounded-full border-2 flex items-center justify-center transition-colors font-bold"
                                          :class="chapterCompletionStatus[chapter.id]
                                             ? 'border-green-500 text-green-500 bg-green-50 dark:!bg-green-500/10' 
@@ -146,7 +146,7 @@ watch(() => props.courseData, (newData) => {
                                         <span v-else class="text-[10px]">{{ Number(idx) + 1 }}</span>
                                     </div>
                                 </div>
-                                <!-- Explicitly handle text overflow -->
+                                <!-- จัดการตัวอักษรที่ล้นเกินอย่างชัดเจน (Explicitly handle text overflow) -->
                                 <div class="flex-1 min-w-0 pr-2 overflow-hidden">
                                     <div class="font-bold text-sm leading-tight mb-0.5 truncate block w-full">{{ getLocalizedText(chapter.title) }}</div>
                                     <div class="text-[10px] text-slate-500 dark:!text-slate-400 font-normal truncate block w-full">
@@ -156,7 +156,7 @@ watch(() => props.courseData, (newData) => {
                             </div>
                         </template>
 
-                        <!-- Lessons List -->
+                        <!-- รายการบทเรียนย่อย (Lessons List) -->
                         <div class="bg-slate-50 dark:!bg-slate-800/50 border-t border-slate-100 dark:border-slate-700 w-full">
                             <div 
                                 v-for="(lesson, lIdx) in chapter.lessons" 
@@ -167,27 +167,27 @@ watch(() => props.courseData, (newData) => {
                                     : 'border-transparent'"
                                 @click="!lesson.is_locked && emit('select-lesson', lesson.id)"
                             >
-                                <!-- Lesson Status Icon -->
+                                <!-- ไอคอนสถานะของบทเรียน (Lesson Status Icon) -->
                                 <div class="mr-3 flex-shrink-0">
-                                    <!-- Completed (Takes Precedence) -->
+                                    <!-- เรียนจบแล้ว (สำคัญที่สุด) (Completed - Takes Precedence) -->
                                     <q-icon v-if="isLessonCompleted(lesson)" 
                                             name="check_circle" 
                                             class="text-green-500" 
                                             size="20px" 
                                     />
-                                    <!-- Active/Playing (If not completed) -->
+                                    <!-- กำลังเรียนอยู่ (Active/Playing - If not completed) -->
                                     <q-icon v-else-if="currentLessonId === lesson.id" 
                                             name="play_circle_filled" 
                                             class="text-blue-600 dark:!text-blue-400 animate-pulse" 
                                             size="20px" 
                                     />
-                                    <!-- Locked -->
+                                    <!-- ถูกล็อคอยู่ (Locked) -->
                                     <q-icon v-else-if="lesson.is_locked" 
                                             name="lock" 
                                             class="text-slate-400 dark:!text-slate-500 opacity-70" 
                                             size="18px" 
                                     />
-                                    <!-- Not Started -->
+                                    <!-- ยังไม่ได้เริ่ม (Not Started) -->
                                     <div v-else class="w-[18px] h-[18px] rounded-full border-2 border-slate-300 dark:border-slate-600"></div>
                                 </div>
 
@@ -214,7 +214,7 @@ watch(() => props.courseData, (newData) => {
 </template>
 
 <style scoped>
-/* Custom scrollbar for better aesthetics */
+/* สครอลบาร์ปรับแต่งเพื่อความสวยงาม (Custom scrollbar for better aesthetics) */
 ::-webkit-scrollbar {
   width: 4px;
 }

Frontend-Learner/components/classroom/VideoPlayer.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 /**
  * @file VideoPlayer.vue
- * @description Video Player Component with custom controls provided by design
+ * @description คอมโพเนนต์เครื่องเล่นวิดีโอพร้อมด้วยตัวควบคุมแบบกำหนดเองตามการออกแบบ (Video Player Component with custom controls provided by design)
  */
 
 const props = defineProps<{
@@ -22,7 +22,7 @@ const videoProgress = ref(0);
 const currentTime = ref(0);
 const duration = ref(0);
 
-// Media Prefs
+// การตั้งค่าเกี่ยวกับสื่อ (Media Prefs)
 const { volume, muted: isMuted, setVolume, setMuted, applyTo } = useMediaPrefs();
 
 const volumeIcon = computed(() => {
@@ -40,7 +40,7 @@ const formatTime = (time: number) => {
 const currentTimeDisplay = computed(() => formatTime(currentTime.value));
 const durationDisplay = computed(() => formatTime(duration.value || 0));
 
-// YouTube Helper Logic
+// ตรรกะตัวช่วยสำหรับ YouTube (YouTube Helper Logic)
 const isYoutube = computed(() => {
     const s = props.src.toLowerCase();
     return s.includes('youtube.com') || s.includes('youtu.be');
@@ -50,7 +50,7 @@ const youtubeEmbedUrl = computed(() => {
     if (!isYoutube.value) return '';
     let videoId = '';
     
-    // Extract Video ID
+    // ดึงรหัสวิดีโอ (Extract Video ID)
     if (props.src.includes('youtu.be')) {
         videoId = props.src.split('youtu.be/')[1]?.split('?')[0];
     } else {
@@ -58,18 +58,18 @@ const youtubeEmbedUrl = computed(() => {
         videoId = urlParams.get('v') || '';
     }
 
-    // Return Embed URL with enablejsapi=1
+    // คืนค่า URL สำหรับฝังพร้อมเปิดใช้งาน jsapi (Return Embed URL with enablejsapi=1)
     return `https://www.youtube.com/embed/${videoId}?enablejsapi=1&rel=0`;
 });
 
-// YouTube API Tracking
+// การติดตามผ่าน YouTube API (YouTube API Tracking)
 let ytPlayer: any = null;
 let ytInterval: any = null;
 
 const initYoutubeAPI = () => {
     if (!isYoutube.value || typeof window === 'undefined') return;
 
-    // Load API Script if not exists
+    // โหลดสคริปต์ API หากยังไม่มี (Load API Script if not exists)
     if (!(window as any).YT) {
         const tag = document.createElement('script');
         tag.src = "https://www.youtube.com/iframe_api";
@@ -83,7 +83,7 @@ const initYoutubeAPI = () => {
                 'onReady': (event: any) => {
                     duration.value = event.target.getDuration();
                     
-                    // Resume Logic for YouTube
+                    // ตรรกะการเล่นต่อสำหรับ YouTube (Resume Logic for YouTube)
                     if (props.initialSeekTime && props.initialSeekTime > 0) {
                         event.target.seekTo(props.initialSeekTime, true);
                     }
@@ -118,7 +118,7 @@ const startYTTracking = () => {
             currentTime.value = ytPlayer.getCurrentTime();
             emit('timeupdate', currentTime.value, duration.value);
         }
-    }, 1000); // Check every second
+    }, 1000); // ตรวจสอบทุกๆ วินาที (Check every second)
 };
 
 const stopYTTracking = () => {
@@ -145,7 +145,7 @@ onUnmounted(() => {
     destroyYoutubePlayer();
 });
 
-// Watch for src change to re-init
+// เฝ้าดูการเปลี่ยนแปลงของ src เพื่อเริ่มต้นใหม่ (Watch for src change to re-init)
 watch(() => props.src, (newSrc, oldSrc) => {
     if (newSrc !== oldSrc) {
         destroyYoutubePlayer();
@@ -174,8 +174,8 @@ const togglePlay = () => {
             playPromise.then(() => {
                 isPlaying.value = true;
             }).catch(error => {
-                // Auto-play was prevented or play was interrupted
+                // การเล่นอัตโนมัติถูกป้องกันหรือถูกขัดจังหวะ (Auto-play was prevented or play was interrupted)
-                // We can safely ignore this error
+                // สามารถละเว้นข้อผิดพลาดนี้ได้อย่างปลอดภัย (We can safely ignore this error)
                 console.log("Video play request handled:", error.name);
             });
         }
@@ -223,14 +223,14 @@ const handleVolumeChange = (val: any) => {
     setVolume(newVol);
 };
 
-// Expose video ref for parent to control if needed
+// เปิดเผย video ref ให้คอมโพเนนต์แม่ควบคุมถ้าจำเป็น (Expose video ref for parent to control if needed)
 defineExpose({
     videoRef,
     pause: () => videoRef.value?.pause(),
     currentTime: () => videoRef.value?.currentTime || 0
 });
 
-// Watch for volume/mute changes to apply to video element
+// เฝ้าดูการเปลี่ยนแปลงระดับเสียง/ปิดเสียง เพื่อนำไปใช้กับองค์ประกอบวิดีโอ (Watch for volume/mute changes to apply to video element)
 watch([volume, isMuted], () => {
     if (videoRef.value) applyTo(videoRef.value);
 });
@@ -238,7 +238,7 @@ watch([volume, isMuted], () => {
 
 <template>
     <div class="bg-black rounded-xl overflow-hidden shadow-2xl mb-6 aspect-video relative group ring-1 ring-white/10">
-        <!-- 1. YouTube Player -->
+        <!-- 1. เครื่องเล่น YouTube (YouTube Player) -->
         <iframe
             v-if="isYoutube"
             id="youtube-iframe"
@@ -249,7 +249,7 @@ watch([volume, isMuted], () => {
             allowfullscreen
         ></iframe>
 
-        <!-- 2. Standard HTML5 Video Player -->
+        <!-- 2. เครื่องเล่นวิดีโอ HTML5 มาตรฐาน (Standard HTML5 Video Player) -->
         <div v-else class="w-full h-full relative group/video cursor-pointer">
             <video
                 ref="videoRef"
@@ -262,9 +262,9 @@ watch([volume, isMuted], () => {
                 @ended="handleEnded"
             />
         
-            <!-- Custom Controls Overlay (Only for HTML5 Video) -->
+            <!-- เลเยอร์ควบคุมแบบกำหนดเอง (Overlay) เฉพาะสำหรับวิดีโอ HTML5 เท่านั้น (Custom Controls Overlay (Only for HTML5 Video)) -->
             <div class="absolute bottom-0 left-0 right-0 p-6 bg-gradient-to-t from-black/90 via-black/40 to-transparent transition-opacity opacity-0 group-hover/video:opacity-100 flex flex-col gap-3">
-                <!-- Progress Bar -->
+                <!-- แถบแสดงความคืบหน้า (Progress Bar) -->
                 <div class="relative flex-grow h-1.5 bg-white/20 rounded-full cursor-pointer group/progress overflow-hidden" @click="seek">
                     <div class="absolute top-0 left-0 h-full bg-blue-500 rounded-full group-hover/progress:bg-blue-400 transition-all shadow-[0_0_12px_rgba(59,130,246,0.6)]" :style="{ width: videoProgress + '%' }"></div>
                 </div>
@@ -275,7 +275,7 @@ watch([volume, isMuted], () => {
                     
                     <div class="flex-grow"></div>
 
-                    <!-- Volume Control -->
+                    <!-- ตัวควบคุมระดับเสียง (Volume Control) -->
                     <div class="flex items-center gap-2 group/volume relative">
                         <q-btn flat round dense :icon="volumeIcon" @click.stop="handleToggleMute" color="white" class="hover:scale-110 transition-transform" />
                         <div class="w-0 group-hover/volume:w-24 overflow-hidden transition-all duration-300 flex items-center bg-black/60 backdrop-blur-md rounded-full px-2">

Frontend-Learner/components/common/FormInput.vue

@@ -1,8 +1,8 @@
 <script setup lang="ts">
 /**
  * @file FormInput.vue
- * @description Reusable input component with label, error handling, and support for disabled/required states.
+ * @description คอมโพเนนต์ช่องกรอกข้อมูล (Input) แบบนำกลับมาใช้ใหม่ได้ พร้อมรองรับข้อความป้ายกำกับ, จัดการข้อผิดพลาด และสถานะปิดใช้งาน/บังคับกรอก
- * Now supports password visibility toggle.
+ * รองรับการสลับซ่อน/แสดงรหัสผ่าน
  */
 
 const props = defineProps<{
@@ -16,19 +16,19 @@ const props = defineProps<{
 }>()
 
 const emit = defineEmits<{
-  /** Update v-model value */
+  /** อัปเดตค่า v-model (Update v-model value) */
   'update:modelValue': [value: string]
 }>()
 
-// Password visibility state
+// สถานะการซ่อน/แสดงรหัสผ่าน (Password visibility state)
 const showPassword = ref(false)
 
-// Toggle function
+// ฟังก์ชันสำหรับสลับสถานะ (Toggle function)
 const togglePassword = () => {
   showPassword.value = !showPassword.value
 }
 
-// Compute input type based on visibility state
+// คำนวณประเภทของช่องกรอกข้อมูล بناءً pada state (Compute input type based on visibility state)
 const inputType = computed(() => {
   if (props.type === 'password') {
     return showPassword.value ? 'text' : 'password'
@@ -59,7 +59,7 @@ const updateValue = (event: Event) => {
         @input="updateValue"
       >
       
-      <!-- Password Toggle Button -->
+      <!-- ปุ่มสลับซ่อน/แสดงรหัสผ่าน (Password Toggle Button) -->
       <button
         v-if="type === 'password'"
         type="button"
@@ -67,13 +67,13 @@ const updateValue = (event: Event) => {
         @click="togglePassword"
         tabindex="-1"
       >
-        <!-- Eye Icon (Show) -->
+        <!-- ไอคอนเปิดตา (แสดงรหัสผ่าน) (Eye Icon - Show) -->
         <svg v-if="!showPassword" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
           <path d="M2 12s3-7 10-7 10 7 10 7-3 7-10 7-10-7-10-7Z"/>
           <circle cx="12" cy="12" r="3"/>
         </svg>
         
-        <!-- Eye Off Icon (Hide) -->
+        <!-- ไอคอนปิดตา (ซ่อนรหัสผ่าน) (Eye Off Icon - Hide) -->
         <svg v-else xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
           <path d="M9.88 9.88a3 3 0 1 0 4.24 4.24"/>
           <path d="M10.73 5.08A10.43 10.43 0 0 1 12 5c7 0 10 7 10 7a13.16 13.16 0 0 1-1.67 2.68"/>

Frontend-Learner/components/common/GlobalLoader.vue

@@ -1,20 +1,20 @@
 <script setup lang="ts">
 /**
  * @file GlobalLoader.vue
- * @description Global full-screen loading overlay that triggers during page navigation.
+ * @description คอมโพเนนต์หน้าจอโหลดแบบเต็มจอ (Global full-screen loading) แสดงผลตอนเปลี่ยนหน้า
- * Uses a premium pulsing logo animation.
+ * พร้มแอนิเมชันโลโก้ขยับได้แบบพรีเมียม
  */
 
 const nuxtApp = useNuxtApp()
 const isLoading = ref(false)
 
-// Hook into Nuxt page transitions
+// ดักจับจังหวะการเปลี่ยนหน้าผ่าย Nuxt hook (Hook into Nuxt page transitions)
 nuxtApp.hook('page:start', () => {
   isLoading.value = true
 })
 
 nuxtApp.hook('page:finish', () => {
-  // Add a small delay for better UX (prevents flickering on fast loads)
+  // หน่วงเวลาเล็กน้อยเพื่อให้ไหลลื่น ไม่กระพริบเร็วไปหากหน้าโหลดเสร็จไว (Add a small delay for better UX)
   setTimeout(() => {
     isLoading.value = false
   }, 500)
@@ -25,14 +25,14 @@ nuxtApp.hook('page:finish', () => {
   <Transition name="fade">
     <div v-if="isLoading" class="fixed inset-0 z-[99999] flex flex-col items-center justify-center bg-white dark:bg-[#0f172a] transition-colors duration-300">
       <div class="relative flex flex-col items-center">
-        <!-- Main Logo Box -->
+        <!-- กล่องโลโก้หลัก (Main Logo Box) -->
         <div class="w-20 h-20 bg-blue-50 dark:bg-blue-900/20 rounded-2xl flex items-center justify-center mb-6 animate-pulse-soft">
           <div class="w-12 h-12 bg-blue-600 rounded-xl flex items-center justify-center shadow-lg shadow-blue-600/30 animate-bounce-subtle">
             <span class="text-2xl font-black text-white">E</span>
           </div>
         </div>
         
-        <!-- Loading Text -->
+        <!-- ข้อความระหว่างโหลด (Loading Text) -->
         <div class="flex flex-col items-center gap-2">
           <h3 class="text-lg font-bold text-slate-800 dark:text-white tracking-wide">e-Learning</h3>
           <div class="flex gap-1">

Frontend-Learner/components/common/LanguageSwitcher.vue

@@ -1,13 +1,13 @@
 <script setup lang="ts">
 /**
  * @file LanguageSwitcher.vue
- * @description Language switcher component using Quasar dropdown.
+ * @description คอมโพเนนต์ตัวสลับภาษาใช้ปุ่ม Dropdown ของ Quasar
- * Allows switching between Thai (th) and English (en) locales.
+ * ใช้สลับระหว่างภาษาไทย (th) และภาษาอังกฤษ (en)
  */
 
 const { locale, setLocale, locales } = useI18n()
 
-// Get available locales with their names
+// ดึงรายการภาษาที่มีอยู่พร้อมชื่อภาษา (Get available locales with their names)
 const availableLocales = computed(() => {
   return (locales.value as Array<{ code: string; name: string }>).map((loc) => ({
     code: loc.code,
@@ -15,13 +15,13 @@ const availableLocales = computed(() => {
   }))
 })
 
-// Get flag image path for a locale
+// ดึงพาธภาพธงชาติสำหรับภาษานั้นๆ (Get flag image path for a locale)
 const getFlagPath = (code: string) => `/flags/${code}.png`
 
-// Handle locale change
+// จัดการเมื่อเปลี่ยนภาษา (Handle locale change)
 const changeLocale = async (code: string) => {
   await setLocale(code as 'th' | 'en')
-  // Cookie is automatically handled by @nuxtjs/i18n with detectBrowserLanguage.useCookie
+  // คุกกี้ (Cookie) จะถูกจัดการอัตโนมัติโดย @nuxtjs/i18n จากออปชัน detectBrowserLanguage.useCookie
 }
 </script>
 
@@ -32,7 +32,7 @@ const changeLocale = async (code: string) => {
     class="language-btn"
     :aria-label="$t('language.label')"
   >
-    <!-- Show current locale flag -->
+    <!-- แสดงธงชาติตามภาษาที่ใช้อยู่ (Show current locale flag) -->
     <img 
       :src="getFlagPath(locale)" 
       :alt="locale.toUpperCase()" 
@@ -178,7 +178,7 @@ const changeLocale = async (code: string) => {
 </style>
 
 <style>
-/* Global styles for teleported menu */
+/* สไตล์ Global สำหรับเมนูที่ถูกข้ามไปแสดงผลที่อื่นด้วย Teleport (Global styles for teleported menu) */
 .language-menu {
   border-radius: 16px;
   box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);

Frontend-Learner/components/common/LoadingSkeleton.vue

@@ -1,4 +1,8 @@
 <script setup lang="ts">
+/**
+ * @file LoadingSkeleton.vue
+ * @description คอมโพเนนต์ Skeleton สำหรับแสดงโครงร่างหน้าจอระหว่างรอโหลดข้อมูล (Loading Skeleton Component)
+ */
 defineProps<{
   type?: 'text' | 'avatar' | 'card' | 'button'
   width?: string
@@ -9,6 +13,7 @@ defineProps<{
 
 <template>
   <div class="skeleton-wrapper">
+    <!-- กรณีเป็นโครงร่างประเภทการ์ด (Card type skeleton) -->
     <template v-if="type === 'card'">
       <div v-for="i in (count || 1)" :key="i" class="skeleton-card">
         <div class="skeleton skeleton-image"/>
@@ -20,14 +25,17 @@ defineProps<{
       </div>
     </template>
     
+    <!-- กรณีเป็นโครงร่างประเภทรูปโปรไฟล์ (Avatar type skeleton) -->
     <template v-else-if="type === 'avatar'">
       <div class="skeleton skeleton-avatar"/>
     </template>
     
+    <!-- กรณีเป็นโครงร่างประเภทปุ่มกด (Button type skeleton) -->
     <template v-else-if="type === 'button'">
       <div class="skeleton skeleton-button" :style="{ width: width || '120px' }"/>
     </template>
     
+    <!-- กรณีอื่นๆ จะแสดงเป็นบรรทัดข้อความ (Fallback/Text type skeleton) -->
     <template v-else>
       <div 
         v-for="i in (count || 1)" 

Frontend-Learner/components/common/LoadingSpinner.vue

@@ -1,4 +1,8 @@
 <script setup lang="ts">
+/**
+ * @file LoadingSpinner.vue
+ * @description ไอคอนหมุนแสดงการโหลด (Loading Spinner Component) เหมาะสำหรับใช้ตรงจุดเล็กๆ หรือตอนโหลดหน้าเว็บ
+ */
 defineProps<{
   size?: 'sm' | 'md' | 'lg'
   text?: string

Frontend-Learner/components/course/CourseCard.vue

@@ -1,8 +1,8 @@
 <script setup lang="ts">
 /**
  * @file CourseCard.vue
- * @description Standardized Course Card Component.
+ * @description คอมโพเนนต์การ์ดแสดงคอร์สเรียนมาตรฐาน (Standardized Course Card Component)
- * Usage: <CourseCard :id="1" title="..." ... />
+ * วิธีใช้งาน: <CourseCard :id="1" title="..." ... />
  */
 
 interface CourseCardProps {
@@ -20,7 +20,7 @@ interface CourseCardProps {
   image?: string
   loading?: boolean
   
-  // Action Flags
+  // ตัวควบคุมการแสดงปุ่มต่างๆ (Action Flags)
   showViewDetails?: boolean
   showContinue?: boolean
   showCertificate?: boolean
@@ -59,7 +59,7 @@ const displayCategory = computed(() => getLocalizedText(props.category))
 <template>
   <div class="group relative flex flex-col bg-white dark:!bg-slate-900 rounded-3xl overflow-hidden border border-slate-200 dark:border-white/5 shadow-sm hover:shadow-xl dark:shadow-none hover:-translate-y-1 transition-all duration-300 h-full">
     
-    <!-- Thumbnail Section -->
+    <!-- ส่วนรูปหน้าปก (Thumbnail Section) -->
     <div class="relative w-full aspect-video overflow-hidden">
       <img 
         v-if="image"
@@ -71,12 +71,12 @@ const displayCategory = computed(() => getLocalizedText(props.category))
          <q-icon name="image" size="48px" class="text-slate-300 dark:text-slate-600" />
       </div>
 
-      <!-- Overlays -->
+      <!-- เลเยอร์ฟิลเตอร์ซ้อนทับ (Overlays) -->
       <div class="absolute inset-0 bg-gradient-to-t from-slate-900/60 to-transparent opacity-0 group-hover:opacity-100 transition-opacity"></div>
       
 
 
-      <!-- Completed Badge -->
+      <!-- ป้ายแสดงสถานะเรียนจบ (Completed Badge) -->
       <div v-if="completed" class="absolute inset-0 bg-emerald-900/40 backdrop-blur-[2px] flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity duration-300">
          <span class="bg-emerald-500 text-white w-12 h-12 rounded-full flex items-center justify-center shadow-lg transform scale-75 group-hover:scale-100 transition-transform">
            <q-icon name="check" size="24px" />
@@ -84,9 +84,9 @@ const displayCategory = computed(() => getLocalizedText(props.category))
       </div>
     </div>
 
-    <!-- Content Section -->
+    <!-- ส่วนเนื้อหาข้อมูล (Content Section) -->
     <div class="p-6 flex flex-col flex-grow">
-      <!-- Meta Info (Lessons/Duration) -->
+      <!-- ข้อมูลประกอบย่อย เช่น บทเรียน/ระยะเวลา (Meta Info - Lessons/Duration) -->
       <div class="flex items-center gap-3 text-xs font-bold text-slate-500 dark:text-slate-400 mb-3 uppercase tracking-wider">
          <span v-if="lessons" class="flex items-center gap-1">
            <q-icon name="menu_book" size="14px" /> {{ lessons }} {{ $t('course.lessonsUnit') }}
@@ -96,18 +96,18 @@ const displayCategory = computed(() => getLocalizedText(props.category))
          </span>
       </div>
 
-      <!-- Title -->
+      <!-- ชื่อคอร์ส (Title) -->
       <h3 class="text-lg font-black text-slate-900 dark:text-white mb-2 line-clamp-2 leading-tight group-hover:text-blue-600 dark:group-hover:text-blue-400 transition-colors">
         {{ displayTitle }}
       </h3>
 
-      <!-- Description -->
+      <!-- รายละเอียดเพิ่มเติม (Description) -->
       <p v-if="displayDescription" class="text-sm text-slate-500 dark:text-slate-400 line-clamp-2 mb-6">
         {{ displayDescription }}
       </p>
 
       <div class="mt-auto pt-4">
-        <!-- Progress Bar -->
+        <!-- หลอดความคืบหน้า (Progress Bar) -->
         <div v-if="progress !== undefined && !completed && !hideProgress" class="mb-4">
           <div class="flex justify-between text-[10px] font-bold uppercase mb-1">
             <span class="text-slate-500 dark:text-slate-400">{{ $t('course.progress') }}</span>
@@ -118,9 +118,9 @@ const displayCategory = computed(() => getLocalizedText(props.category))
           </div>
         </div>
 
-        <!-- Action Buttons -->
+        <!-- ปุ่มปฏิบัติการต่างๆ (Action Buttons) -->
         <div v-if="!hideActions" class="flex flex-col gap-3">
-          <!-- View Details (Secondary Action) -->
+          <!-- ปุ่มดูรายละเอียด (ปุ่มรอง) (View Details - Secondary Action) -->
           <q-btn
             v-if="showViewDetails && !completed && !progress"
             flat
@@ -130,7 +130,7 @@ const displayCategory = computed(() => getLocalizedText(props.category))
             :to="`/course/${id}`"
           />
 
-          <!-- Continue Learning (Primary Action) -->
+          <!-- ปุ่มเรียนต่อ/เริ่มเรียน (ปุ่มหลัก) (Continue Learning - Primary Action) -->
           <q-btn
             v-if="showContinue || (progress && !completed) || (progress === 0 && !completed)"
             unelevated
@@ -142,7 +142,7 @@ const displayCategory = computed(() => getLocalizedText(props.category))
         </div>
 
         <div v-if="completed" class="space-y-2">
-            <!-- Study Again -->
+            <!-- ปุ่มเรียนอีกครั้ง (Study Again) -->
             <q-btn
               v-if="showStudyAgain"
               unelevated
@@ -152,7 +152,7 @@ const displayCategory = computed(() => getLocalizedText(props.category))
               :to="`/classroom/learning?course_id=${id}`"
             />
             
-            <!-- Download Certificate -->
+            <!-- ปุ่มดาวน์โหลดใบรับรอง (Download Certificate) -->
             <q-btn
               v-if="showCertificate"
               unelevated
@@ -168,5 +168,5 @@ const displayCategory = computed(() => getLocalizedText(props.category))
 </template>
 
 <style scoped>
-/* Scoped overrides if needed */
+/* ใส่โค้ด CSS เพิ่มได้ถ้าต้องการครอบคลุมเฉพาะไฟล์นี้ (Scoped overrides if needed) */
 </style>

Frontend-Learner/components/discovery/CategorySidebar.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 /**
  * @file CategorySidebar.vue
- * @description Sidebar for filtering courses by category
+ * @description แถบเมนูด้านข้างสำหรับกรองคอร์สตามหมวดหมู่ (Sidebar for filtering courses by category)
  */
 
 const props = defineProps<{
@@ -81,13 +81,13 @@ const toggleCategory = (id: number) => {
                                 {{ getLocalizedText(cat.name) }}
                             </span>
                             
-                            <!-- Active Indicator Dot -->
+                            <!-- จุดแสดงสถานะเมื่อถูกเลือก (Active Indicator Dot) -->
                             <div v-if="modelValue.includes(cat.id)" class="ml-auto w-1.5 h-1.5 rounded-full bg-blue-600 dark:bg-blue-400 shadow-lg shadow-blue-500/50"></div>
                         </div>
                     </div>
                 </div>
 
-                <!-- Show More/Less Action -->
+                <!-- ปุ่มแสดงเพิ่มเติม/แสดงน้อยลง (Show More/Less Action) -->
                 <div 
                     v-if="categories.length > 5"
                     @click="showAllCategories = !showAllCategories"

Frontend-Learner/components/discovery/CourseDetailView.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 /**
  * @file CourseDetailView.vue
- * @description Quick view of course details including video preview, curriculum, and enroll logic
+ * @description แสดงรายละเอียดคอร์สแบบรวดเร็ว รวมถึงตัวอย่างวิดีโอ, หลักสูตร, และระบบการลงทะเบียน
  */
 import { ref, computed } from 'vue'
 
@@ -51,9 +51,9 @@ const handleEnroll = () => {
     if(!props.course) return;
     enrollmentLoading.value = true;
     emit('enroll', props.course.id);
-    // Loading state reset depends on parent, but locally we can reset after emit or keep until prop changes
+    // สถานะ Loading ถูกจัดการโดยคอมโพเนนต์แม่ แต่ในคอมโพเนนต์นี้เรารีเซ็ตหลังจากส่ง event หรือเก็บไว้จนกว่า prop จะเปลี่ยน
-    // In this pattern, we just emit.
+    // ในรูปแบบนี้ เราแค่ส่ง event ออกไป (just emit)
-    setTimeout(() => enrollmentLoading.value = false, 2000); // Safety timeout
+    setTimeout(() => enrollmentLoading.value = false, 2000); // ตั้งเวลารีเซ็ตเพื่อความปลอดภัย (Safety timeout)
 };
 const instructorData = computed(() => {
     if (props.course?.instructors && props.course.instructors.length > 0) {
@@ -67,10 +67,10 @@ const instructorData = computed(() => {
 <template>
     <div class="animate-fade-in-up">
         <div class="grid grid-cols-1 lg:grid-cols-3 gap-8">
-            <!-- Left: Content Detail -->
+            <!-- ด้านซ้าย: รายละเอียดเนื้อหา (Left: Content Detail) -->
             <div class="lg:col-span-2 space-y-8">
                 
-                <!-- Video Preview Section -->
+                <!-- ส่วนแสดงตัวอย่างวิดีโอ (Video Preview Section) -->
                 <div class="relative aspect-video rounded-3xl overflow-hidden shadow-2xl group cursor-pointer bg-slate-900 border-4 border-white dark:border-slate-800 transition-transform duration-500 hover:scale-[1.01]">
                      <template v-if="course.media?.video_url">
                          <video 
@@ -81,19 +81,19 @@ const instructorData = computed(() => {
                              <source :src="course.media.video_url" type="video/mp4">
                              {{ $t('course.videoNotSupported') }}
                          </video>
-                         <!-- Custom Play Overlay when not playing - simple version is often best -->
+                         <!-- ปุ่มเล่นวิดีโอแบบปรับแต่งเองตอนยังไม่เล่น (Custom Play Overlay when not playing) -->
                      </template>
-                     <!-- Beautiful Image Showcase if no video -->
+                     <!-- แสดงรูปภาพสวยๆ กรณีที่ไม่มีวิดีโอ (Beautiful Image Showcase if no video) -->
                      <template v-else>
                          <div class="w-full h-full flex items-center justify-center relative overflow-hidden bg-slate-950 group">
-                             <!-- Blurred background fill -->
+                             <!-- รูปพื้นหลังเบลอ (Blurred background fill) -->
                              <img 
                                 v-if="course.thumbnail_url || course.cover_image"
                                 :src="course.thumbnail_url || course.cover_image"
                                 class="absolute inset-0 w-full h-full object-cover opacity-40 blur-2xl scale-125"
                              />
                              
-                             <!-- Main Sharp Image -->
+                             <!-- รูปหลักแบบคมชัด (Main Sharp Image) -->
                              <img 
                                 v-if="course.thumbnail_url || course.cover_image"
                                 :src="course.thumbnail_url || course.cover_image"
@@ -107,7 +107,7 @@ const instructorData = computed(() => {
                      </template>
                 </div>
 
-                <!-- Course Title & Description -->
+                <!-- ชื่อคอร์สและรายละเอียด (Course Title & Description) -->
                 <div>
                     <h1 class="text-3xl md:text-4xl font-extrabold text-slate-900 dark:text-white mb-4 leading-tight">
                         {{ getLocalizedText(course.title) }}
@@ -118,10 +118,10 @@ const instructorData = computed(() => {
                     </div>
                 </div>
 
-                <!-- Course Detail - Single Page Layout -->
+                <!-- รายละเอียดคอร์ส - รูแแบบหน้าเดียว (Course Detail - Single Page Layout) -->
                 <div class="space-y-10">
                     
-                    <!-- Instructor Info -->
+                    <!-- ข้อมูลผู้สอน (Instructor Info) -->
                     <div class="flex flex-col sm:flex-row gap-6 items-start sm:items-center pb-8 border-b border-slate-200 dark:border-slate-800">
                         <q-avatar size="64px">
                             <img :src="instructorData?.profile?.avatar_url || 'https://cdn.quasar.dev/img/boy-avatar.png'" />
@@ -135,7 +135,7 @@ const instructorData = computed(() => {
                         </div>
                     </div>
 
-                    <!-- Curriculum / Lesson Details -->
+                    <!-- รายละเอียดหลักสูตร / บทเรียน (Curriculum / Lesson Details) -->
                     <div>
                         <div class="flex items-center justify-between mb-6">
                             <h3 class="text-xl font-bold text-slate-900 dark:text-white">
@@ -148,7 +148,7 @@ const instructorData = computed(() => {
                         
                         <div class="space-y-4">
                              <div v-for="(chapter, idx) in course.chapters" :key="chapter.id" class="group">
-                                 <!-- Chapter Header -->
+                                 <!-- ส่วนหัวของบท (Chapter Header) -->
                                  <div class="px-6 py-4 bg-white dark:bg-slate-800 rounded-2xl border border-slate-200 dark:border-white/5 font-black text-slate-800 dark:text-white flex justify-between items-center mb-2 shadow-sm">
                                      <span class="flex items-center gap-3">
                                          <span class="w-7 h-7 flex items-center justify-center bg-slate-100 dark:bg-white/10 rounded-lg text-xs font-bold font-mono">{{ Number(idx) + 1 }}</span>
@@ -157,7 +157,7 @@ const instructorData = computed(() => {
                                      <span class="text-[10px] uppercase font-black tracking-widest text-slate-400 opacity-60">{{ chapter.lessons?.length || 0 }} {{ $t('course.lessonsUnit') }}</span>
                                  </div>
                                  
-                                 <!-- Lessons List -->
+                                 <!-- รายการบทเรียน (Lessons List) -->
                                  <div class="ml-4 pl-4 border-l-2 border-slate-100 dark:border-slate-800 space-y-1 mt-3">
                                      <div v-for="lesson in chapter.lessons" :key="lesson.id" class="px-5 py-3 flex items-center gap-3 text-sm text-slate-600 dark:text-slate-400 hover:bg-white dark:hover:bg-white/5 rounded-xl transition-all hover:translate-x-1">
                                          <div class="w-8 h-8 rounded-full flex items-center justify-center shrink-0" :class="lesson.type === 'VIDEO' ? 'bg-blue-50 text-blue-600 dark:bg-blue-500/10 dark:text-blue-400' : 'bg-orange-50 text-orange-600 dark:bg-orange-500/10 dark:text-orange-400'">
@@ -173,7 +173,7 @@ const instructorData = computed(() => {
                                  </div>
                             </div>
                             
-                            <!-- Empty State -->
+                            <!-- กรณีที่ไม่มีข้อมูล (Empty State) -->
                             <div v-if="!course.chapters || course.chapters.length === 0" class="flex flex-col items-center justify-center py-12 text-slate-400 dark:text-slate-500 bg-white/50 dark:bg-slate-900/50 rounded-2xl border-2 border-dashed border-slate-200 dark:border-slate-800">
                                  <q-icon name="menu_book" size="40px" class="mb-2 opacity-50" />
                                  <p class="text-sm font-medium">{{ $t('course.noContent') }}</p>
@@ -185,11 +185,11 @@ const instructorData = computed(() => {
 
             </div>
 
-            <!-- Right: Enrollment Card -->
+            <!-- ด้านขวา: การ์ดลงทะเบียน (Right: Enrollment Card) -->
             <div class="lg:col-span-1">
                  <div class="sticky top-24">
                      <div class="bg-white dark:bg-slate-900 rounded-3xl shadow-2xl shadow-blue-500/10 dark:shadow-none p-8 border border-slate-100 dark:border-white/5 relative overflow-hidden group">
-                           <!-- Decorative background glow -->
+                           <!-- ลูกเล่นแสงพื้นหลังตกแต่ง (Decorative background glow) -->
                            <div class="absolute -top-12 -right-12 w-48 h-48 bg-blue-500/10 rounded-full blur-3xl group-hover:bg-blue-500/20 transition-colors"></div>
                            
                            <div class="relative">

Frontend-Learner/components/layout/AppHeader.vue

@@ -1,16 +1,16 @@
 <script setup lang="ts">
 /**
  * @file AppHeader.vue
- * @description The main header for the EduLearn application dashboard.
+ * @description แถบเมนูด้านบนหลัก (Header) สำหรับหน้าแดชบอร์ด (Dashboard) ของระบบ EduLearn
  */
 
 const props = defineProps<{
-  /** Controls visibility of the sidebar toggle button */
+  /** ควบคุมการแสดงผลของปุ่มเปิด/ปิดแถบเมนูด้านข้าง (Sidebar) */
   showSidebarToggle?: boolean;
 }>();
 
 const emit = defineEmits<{
-  /** Emitted when the hamburger menu is clicked */
+  /** ส่งสัญญาณ (Emit) เมื่อผู้ใช้คลิกที่ปุ่มแฮมเบอร์เกอร์เมนู */
   toggleSidebar: [];
 }>();
 
@@ -30,7 +30,7 @@ const toggleTheme = () => {
 <template>
   <q-toolbar class="bg-white dark:!bg-[#020617] text-slate-900 dark:!text-white h-20 border-b border-slate-50 dark:border-slate-800/50 px-6">
     
-    <!-- Left: Hamburger Toggle -->
+    <!-- ด้านซ้าย: ปุ่มย่อขยายแถบเมนูด้านข้าง (Hamburger Toggle) -->
     <q-btn
       flat
       round
@@ -43,10 +43,10 @@ const toggleTheme = () => {
 
     <q-space />
 
-    <!-- Right Section -->
+    <!-- ส่วนการตั้งค่าทางด้านขวา (Right Section) -->
     <div class="flex items-center gap-2 sm:gap-4 md:gap-6 no-wrap">
       
-      <!-- Theme Toggle -->
+      <!-- ปุ่มสลับธีม (Theme Toggle) -->
       <q-btn
         flat
         round
@@ -60,7 +60,7 @@ const toggleTheme = () => {
         <q-tooltip>{{ isDark ? 'โหมดกลางคืน' : 'โหมดกลางวัน' }}</q-tooltip>
       </q-btn>
 
-      <!-- Language Switcher (Pill Style) -->
+      <!-- ตัวสลับภาษาแบบแคปซูล (Language Switcher) -->
       <div 
         @click="toggleLanguage"
         class="flex items-center bg-slate-50 dark:bg-slate-800/50 border border-slate-100 dark:border-slate-800 rounded-xl p-0.5 sm:p-1 cursor-pointer hover:bg-slate-100 transition-all font-bold text-[11px] sm:text-[13px] select-none"
@@ -70,7 +70,7 @@ const toggleTheme = () => {
         <div :class="locale === 'en' ? 'bg-white dark:bg-slate-700 shadow-sm text-blue-600' : 'text-slate-400'" class="px-2 sm:px-3 py-1 rounded-lg transition-all">EN</div>
       </div>
 
-      <!-- Divider -->
+      <!-- เส้นคั่น (Divider) -->
       <div class="hidden sm:block w-[1px] h-8 bg-slate-100 dark:bg-slate-800"></div>
 
       <!-- ส่วนข้อมูลผู้ใช้งาน (User Profile) -->
@@ -102,12 +102,12 @@ const toggleTheme = () => {
 </template>
 
 <style scoped>
-/* Ensure toolbar height is consistent */
+/* บังคับให้ความสูงของ Header เท่ากันเสมอ (Ensure toolbar height is consistent) */
 :deep(.q-toolbar) {
   min-height: 80px;
 }
 
-/* Hide user name only on small mobile screens */
+/* ซ่อนชื่อผู้ใช้ไว้เฉพาะบนหน้าจอมือถือขนาดเล็กเท่านั้น (Hide user name only on small mobile screens) */
 @media (max-width: 600px) {
   .user-info-text {
     display: none !important;

Frontend-Learner/components/layout/AppSidebar.vue

@@ -51,7 +51,7 @@ const handleLogout = () => {
 <template>
   <div class="flex flex-col h-full bg-white dark:!bg-[#04091a] px-4 py-6 border-r border-slate-100 dark:border-slate-800">
     
-    <!-- Logo Section -->
+    <!-- โลโก้แบรนด์ (Logo Section) -->
     <div class="flex items-center gap-3 px-2 mb-10 transition-transform active:scale-95 cursor-pointer" @click="navigateTo('/dashboard')">
       <div class="w-10 h-10 rounded-xl bg-blue-600 flex items-center justify-center shadow-lg shadow-blue-500/20">
         <q-icon name="school" color="white" size="24px" />
@@ -59,7 +59,7 @@ const handleLogout = () => {
       <span class="text-[22px] font-black tracking-tight text-slate-800 dark:text-white">EduLearn</span>
     </div>
 
-    <!-- Main Navigation -->
+    <!-- การนำทางหลัก (Main Navigation) -->
     <div class="space-y-1 mb-8">
       <NuxtLink 
         v-for="item in menuItems" 
@@ -71,12 +71,12 @@ const handleLogout = () => {
         <q-icon :name="item.icon" size="24px" class="transition-colors" />
         <span class="font-bold text-[15px]">{{ item.label }}</span>
         
-        <!-- Active Indicator -->
+        <!-- ตัวบ่งชี้หน้าปัจจุบัน (Active Indicator) -->
         <div v-if="route.path === item.to" class="absolute left-0 top-1/2 -translate-y-1/2 w-1.5 h-6 bg-blue-600 rounded-r-full shadow-[2px_0_8px_rgba(37,99,235,0.4)]"></div>
       </NuxtLink>
     </div>
 
-    <!-- Account Section -->
+    <!-- หมวดหมู่บัญชี (Account Section) -->
     <div class="px-4 mb-4">
       <span class="text-[12px] font-bold text-slate-400 uppercase tracking-widest">{{ $t('sidebar.accountGroup') }}</span>
     </div>
@@ -92,7 +92,7 @@ const handleLogout = () => {
         <span class="font-bold text-[15px]">{{ item.label }}</span>
       </NuxtLink>
 
-      <!-- Logout Button -->
+      <!-- ปุ่มออกจากระบบ (Logout Button) -->
       <button 
         @click="handleLogout"
         class="w-full flex items-center gap-4 px-4 py-3 rounded-2xl transition-all text-red-500 hover:bg-red-50 dark:hover:bg-red-900/10 font-bold text-[15px] group"
@@ -104,7 +104,7 @@ const handleLogout = () => {
 
     <q-space />
 
-    <!-- Promo Card -->
+    <!-- การ์ดโปรโมชั่น (Promo Card) -->
     <div class="mt-auto p-5 rounded-[2rem] bg-slate-50 dark:bg-slate-800/50 border border-slate-100 dark:border-slate-800 relative overflow-hidden group">
       <div class="relative z-10">
         <h4 class="font-black text-slate-800 dark:text-white text-sm mb-1">{{ $t('sidebar.promoTitle') }}</h4>
@@ -118,7 +118,7 @@ const handleLogout = () => {
         </q-btn>
       </div>
       
-      <!-- Subtle background decoration -->
+      <!-- การตกแต่งพื้นหลังแบบจางๆ (Subtle background decoration) -->
       <div class="absolute -right-2 -bottom-2 w-16 h-16 bg-blue-500/5 rounded-full blur-xl"></div>
     </div>
   </div>

Frontend-Learner/components/layout/LandingFooter.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 /**
  * @file LandingFooter.vue
- * @description Footer component for the landing page - Adjusted to Image 2 (E-Learning Platform Branding)
+ * @description ส่วนท้ายของหน้าแรก (Footer component for the landing page)
  */
 </script>
 
@@ -9,7 +9,7 @@
   <footer class="bg-white pt-16 pb-8 border-t border-slate-200">
     <div class="container mx-auto px-6 md:px-12">
       <div class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-8 mb-12 text-left">
-        <!-- Brand -->
+        <!-- โลโก้และชื่อแบรนด์ (Brand) -->
         <div class="space-y-6">
            <NuxtLink to="/" class="flex items-center gap-3 group">
               <div class="bg-blue-600 text-white font-black rounded-full px-6 w-10 h-10 flex items-center justify-center group-hover:scale-110 transition-transform">
@@ -29,7 +29,7 @@
             </p>
         </div>
 
-        <!-- Links -->
+        <!-- ลิงก์ต่างๆ (Links) -->
         <div class="lg:pl-8">
           <h4 class="font-bold text-slate-900 mb-6 text-base tracking-tight">คอร์สเรียน</h4>
           <ul class="space-y-3 text-sm text-slate-500 flex flex-col gap-2">
@@ -39,7 +39,7 @@
           </ul>
         </div>
 
-        <!-- Support -->
+        <!-- การสนับสนุนผู้ใช้ (Support) -->
         <div>
           <h4 class="font-bold text-slate-900 mb-6 text-base">ช่วยเหลือ</h4>
           <ul class="space-y-3 text-sm text-slate-500 flex flex-col gap-2">
@@ -50,11 +50,11 @@
           </ul>
         </div>
 
-        <!-- Contact (Bronco Hourse Data) -->
+        <!-- ข้อมูลการติดต่อ (Contact) -->
         <div class="space-y-6">
           <h4 class="font-bold text-slate-900 text-base">ติดต่อเรา</h4>
           <div class="flex flex-col gap-5">
-            <!-- Location -->
+            <!-- สถานที่ตั้ง (Location) -->
             <div class="flex flex-row items-start gap-4 flex-nowrap">
               <q-icon name="o_location_on" size="20px" color="slate-800" />
               <div class="flex flex-col gap-1 min-w-0">
@@ -65,18 +65,18 @@
               </div>
             </div>
 
-            <!-- Phone -->
+            <!-- เบอร์โทรศัพท์ (Phone) -->
             <div class="flex flex-row items-center gap-4 flex-nowrap">
               <q-icon name="o_phone" size="18px" color="slate-800" />
-              <a href="tel:052-076-025" class="font-semibold text-slate-800 text-sm hover:text-blue-600 font-semibold text-sm transition-colors truncate">
+              <a href="tel:052-076-025" class="font-semibold text-slate-800 text-sm hover:text-blue-600 transition-colors truncate">
                 052-076-025
               </a>
             </div>
 
-            <!-- Email -->
+            <!-- อีเมล (Email) -->
             <div class="flex flex-row items-center gap-4 flex-nowrap">
               <q-icon name="o_email" size="18px" color="slate-800" />
-              <a href="mailto:info@chamomind.com" class="font-semibold text-slate-800 text-sm hover:text-blue-600 font-semibold text-sm transition-colors truncate">
+              <a href="mailto:info@chamomind.com" class="font-semibold text-slate-800 text-sm hover:text-blue-600 transition-colors truncate">
                 info@chamomind.com
               </a>
             </div>
@@ -84,7 +84,7 @@
         </div>
       </div>
 
-      <!-- Bottom Bar (Centered Copyright) -->
+      <!-- แถบด้านล่างสำหรับสงวนลิขสิทธิ์ (Bottom Bar - Centered Copyright) -->
       <div class="pt-8 border-t border-slate-200 text-center">
         <p class="text-sm text-slate-400 font-medium tracking-wide">
           Copyright © CHAMOMIND CO., LTD. 2023

Frontend-Learner/components/layout/LandingHeader.vue

@@ -1,23 +1,22 @@
 <script setup lang="ts">
 /**
  * @file LandingHeader.vue
- * @description The main header for the public landing pages.
+ * @description คอมโพเนนต์แถบเมนูด้านบน (Header Navigation) สำหรับหน้า Landing Page และหน้าเปิดอื่นๆ
- * Features a transparent background that becomes solid/glass upon scrolling.
+ * รองรับการเปลี่ยนภาษา เปลี่ยนโหมดสว่าง/มืด และเข้าถึงเมนูผู้ใช้ (Profile/Logout)
- * Responsive: Collapses into a drawer on mobile (md breakpoint).
  */
-const text = ref('');
 
-// Track scrolling state to adjust header styling
+// ติดตามสถานะการเลื่อนเมาส์ (scroll) เพื่อปรับรูปแบบของ Header
 const isScrolled = ref(false)
 const { isAuthenticated } = useAuth()
-// Mobile Drawer State
+// สถานะเมนูสำหรับหน้าจอมือถือ (Mobile Drawer State)
+// ตัวแปรควบคุมการเปิด/ปิดเมนูบนหน้าจอขนาดเล็ก (Mobile Drawer)
 const mobileMenuOpen = ref(false)
 
 const handleScroll = () => {
   isScrolled.value = window.scrollY > 20
 }
 
-// Lock body scroll when mobile menu is open
+// ปิดการเลื่อนหน้าเว็บ (Lock body scroll) เมื่อเปิดเมนูบนมือถือ
 watch(mobileMenuOpen, (isOpen) => {
   if (isOpen) {
     document.body.style.overflow = 'hidden'
@@ -32,21 +31,21 @@ onMounted(() => {
 
 onUnmounted(() => {
   window.removeEventListener('scroll', handleScroll)
-  document.body.style.overflow = '' // Cleanup
+  document.body.style.overflow = '' // คืนค่าเริ่มต้น (Cleanup)
 })
 </script>
 
 <template>
   <!-- 
-    Header Container 
+    คอนเทนเนอร์ของ Header (Header Container)
-    - Transitions between transparent and glass effect based on scroll.
+    - เปลี่ยนจากสีใส (transparent) เป็นเอฟเฟกต์กระจก (glass effect) เมื่อเลื่อนเมาส์ลง
   -->
   <header 
     class="fixed top-0 left-0 right-0 z-[100] transition-all"
     :class="[isScrolled ? 'h-20 glass-nav shadow-lg' : 'h-20 bg-transparent duration-300 border-b border-b-grey-7 ']"
   >
     <div class="container mx-auto px-6 md:px-12 h-full flex items-center justify-between">
-      <!-- Left Section: Logo -->
+      <!-- ด้านซ้าย: โลโก้แบรนด์ (Left Section: Logo) -->
       <NuxtLink to="/" class="flex items-center gap-3 group">
         <div class="bg-blue-600 text-white font-black rounded-full px-6 w-10 h-10 flex items-center justify-center group-hover:scale-110 transition-transform">
           <q-icon name="o_school" size="24px" />
@@ -67,7 +66,7 @@ onUnmounted(() => {
         </div>
       </NuxtLink>
 
-      <!-- Desktop Navigation (Visible by default, hidden on mobile via CSS 'desktop-nav') -->
+      <!-- การนำทางสำหรับเดสก์ท็อป (แสดงผลเป็นค่าเริ่มต้น, ซ่อนบนมือถือผ่าน CSS  'desktop-nav') -->
      <!--  <nav class="flex desktop-nav items-center gap-8 text-[16px] font-medium">
         <NuxtLink 
           to="/browse" 
@@ -89,10 +88,10 @@ onUnmounted(() => {
 
 
 
-      <!-- Desktop Action Buttons (Visible by default, hidden on mobile via CSS 'desktop-nav') -->
+      <!-- ปุ่มปฏิบัติการสำหรับเดสก์ท็อป (แสดงผลเป็นค่าเริ่มต้น, ซ่อนบนมือถือผ่าน CSS 'desktop-nav') -->
       <div class="flex desktop-nav items-center gap-4">
         <template v-if="!isAuthenticated">
-          <!-- Login Button -->
+          <!-- ปุ่มเข้าสู่ระบบ (Login Button) -->
           <NuxtLink 
             to="/auth/login" 
             class="px-5 py-4 rounded-full text-slate-700 font-semibold text-sm  transition-all hover:-translate-y-0.5"
@@ -101,7 +100,7 @@ onUnmounted(() => {
             {{ $t('auth.login') }}
           </NuxtLink>
           
-          <!-- Register Button -->
+          <!-- ปุ่มสมัครสมาชิก (Register Button) -->
           <NuxtLink 
             to="/auth/register" 
             class="px-5 py-4 rounded-full bg-blue-600 text-white font-semibold text-sm   hover:shadow-blue-600/40 hover:-translate-y-0.5 transition-all"
@@ -120,7 +119,7 @@ onUnmounted(() => {
         </template>
       </div>
 
-      <!-- Mobile Menu Button (Visible on Mobile) -->
+      <!-- ปุ่มเปิดเมนูบนมือถือ (แสดงผลเฉพาะบน Mobile) -->
       <button 
         class="md:hidden mobile-toggle ml-auto relative z-[120] w-10 h-10 flex items-center justify-center rounded-full transition-colors"
         :class="[isScrolled ? 'text-white hover:bg-white/10' : 'text-slate-900 hover:bg-slate-100', mobileMenuOpen ? 'text-slate-900 z-[120]' : '']"
@@ -132,7 +131,7 @@ onUnmounted(() => {
     </div>
   </header>
 
-  <!-- Mobile Navigation Drawer (Teleported to body to avoid z-index/clipping issues with Header) -->
+  <!-- ลิ้นชักเมนูด้านข้างสำหรับมือถือ (Mobile Navigation Drawer - แยกส่วนไปยัง body เพื่อไม่ให้มีปัญหา z-index หรือถูกบัง) -->
   <Teleport to="body">
     <div v-if="mobileMenuOpen">
       <div 
@@ -146,7 +145,7 @@ onUnmounted(() => {
         :class="[mobileMenuOpen ? 'translate-x-0' : 'translate-x-full']"
       >
         <div class="p-6 pt-8 flex flex-col gap-6 h-full overflow-y-auto relative">
-          <!-- Close Button -->
+          <!-- ปุ่มปิดเมนู (Close Button) -->
           <button 
             class="absolute top-6 right-6 w-8 h-8 flex items-center justify-center rounded-full bg-slate-100 text-slate-500 hover:bg-slate-200 transition-colors"
             @click="mobileMenuOpen = false"
@@ -154,7 +153,7 @@ onUnmounted(() => {
             <q-icon name="close" size="20px" />
           </button>
 
-          <!-- Mobile Links -->
+          <!-- ลิงก์สำหรับมือถือ (Mobile Links) -->
           <nav class="flex flex-col gap-2 mt-8">
             <NuxtLink 
               to="/" 
@@ -210,14 +209,14 @@ onUnmounted(() => {
 </template>
 
 <style scoped>
-/* Glassmorphism Effect for Scrolled Header */
+/* เอฟเฟกต์ Glassmorphism สำหรับ Header ตอนเลื่อนเมาส์ลง */
 .glass-nav {
-  background: rgba(15, 23, 42, 0.95); /* Darker background for legibility */
+  background: rgba(15, 23, 42, 0.95); /* พื้นหลังเข้มขึ้นเพื่อให้อ่านตัวหนังสือชัดเจน */
   backdrop-filter: blur(16px);
   border-bottom: 1px solid rgba(255, 255, 255, 0.05);
 }
 
-/* Premium Primary Button Styling */
+/* สไตล์ปุ่มหลัก (Primary Button) แบบพรีเมียม */
 .btn-primary-premium {
   background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
   color: white;
@@ -236,7 +235,7 @@ onUnmounted(() => {
   box-shadow: 0 8px 20px -4px rgba(37, 99, 235, 0.5);
 }
 
-/* Secondary Premium Button Styling */
+/* สไตล์ปุ่มดรอง (Secondary Button) แบบพรีเมียม */
 .btn-secondary-premium {
   padding: 0.75rem 1.5rem;
   border-radius: 0.75rem;
@@ -260,11 +259,11 @@ onUnmounted(() => {
 }
 
 /* 
-  Force Visibility Logic to bypass potential Tailwind Build issues 
+  โลจิกบังคับการแสดงผล เพื่อแก้ปัญหาการคอมไฟล์ของ Tailwind 
-  Ensures Desktop and Mobile parts are strictly separated
+  ยืนยันว่าส่วน Desktop และ Mobile เลย์เอาต์แยกจากกันอย่างชัดเจน
 */
 .desktop-nav {
-  display: flex; /* Default to visible */
+  display: flex; /* แสดงผลเป็นค่าเริ่มต้น */
 }
 
 @media (max-width: 767.98px) {

Frontend-Learner/components/layout/MobileNav.vue

@@ -31,7 +31,7 @@ const handleNavigate = (path: string) => {
 </template>
 
 <style scoped>
-/* Optional shadow for better separation */
+/* เงาด้านบนแบบบางๆ เพื่อแบ่งส่วนล่างให้ชัดเจนขึ้น (Optional shadow for better separation) */
 .shadow-up-1 {
   box-shadow: 0 -1px 3px rgba(0,0,0,0.05);
 }

Frontend-Learner/components/profile/PasswordChangeForm.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 /**
  * @file PasswordChangeForm.vue
- * @description From for changing user password
+ * @description ฟอร์มสำหรับเปลี่ยนรหัสผ่านของผู้ใช้ (From for changing user password)
  */
 
 const props = defineProps<{
@@ -130,7 +130,12 @@ const showConfirmPassword = ref(false);
 
 <style scoped>
 .card-premium {
-  @apply bg-white dark:bg-[#1e293b] border-slate-200 dark:border-white/5;
+  background-color: white;
+  border-color: #e2e8f0;
+}
+:global(.dark) .card-premium {
+  background-color: #1e293b;
+  border-color: rgba(255, 255, 255, 0.05);
   border-radius: 1.5rem;
   border-width: 1px;
   box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05);

Frontend-Learner/components/profile/ProfileEditForm.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 /**
  * @file ProfileEditForm.vue
- * @description From for editing user personal information
+ * @description ฟอร์มสำหรับแก้ไขข้อมูลส่วนตัวของผู้ใช้ (Form for editing user personal information)
  */
 
 const props = defineProps<{
@@ -93,14 +93,14 @@ const onPhoneKeydown = (e: KeyboardEvent) => {
                 <div class="absolute inset-0 bg-black/40 rounded-2xl flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity">
                     <q-icon name="camera_alt" class="text-white text-xl" />
                 </div>
-                <!-- Hidden Input -->
+                <!-- ช่องเลือกไฟล์ที่ถูกซ่อนไว้ (Hidden Input) -->
                 <input ref="fileInput" type="file" class="hidden" accept="image/*" @change="handleFileUpload" >
             </div>
             
             <div class="flex flex-col gap-2">
             <div class="font-bold text-slate-900 dark:text-white mb-1">{{ $t('profile.yourAvatar') }}</div>
             
-            <!-- Buttons Row -->
+            <!-- แถวปุ่มกด (Buttons Row) -->
                 <div class="flex items-center gap-3">
                 <template v-if="modelValue.photoURL">
                     <q-btn 
@@ -124,7 +124,7 @@ const onPhoneKeydown = (e: KeyboardEvent) => {
                 </template>
                 </div>
 
-            <!-- Add Limit Text -->
+            <!-- ข้อความจำกัดขนาดไฟล์ (Add Limit Text) -->
             <div class="mt-1 text-xs text-slate-500 dark:text-slate-400">
                 {{ $t('profile.uploadLimit') }}
             </div>
@@ -248,7 +248,12 @@ const onPhoneKeydown = (e: KeyboardEvent) => {
 
 <style scoped>
 .card-premium {
-  @apply bg-white dark:bg-[#1e293b] border-slate-200 dark:border-white/5;
+  background-color: white;
+  border-color: #e2e8f0;
+}
+:global(.dark) .card-premium {
+  background-color: #1e293b;
+  border-color: rgba(255, 255, 255, 0.05);
   border-radius: 1.5rem;
   border-width: 1px;
   box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05);

Frontend-Learner/components/user/UserAvatar.vue

@@ -1,4 +1,8 @@
 <script setup lang="ts">
+/**
+ * @file UserAvatar.vue
+ * @description คอมโพเนนต์แสดงรูปโปรไฟล์ผู้ใช้ หากไม่มีรูปจะแสดงตัวอักษรย่อของชื่อ
+ */
 const props = defineProps<{
   size?: number | string
   photoURL?: string
@@ -19,7 +23,7 @@ const avatarSize = computed(() => {
 const initials = computed(() => {
   const getFirstChar = (name?: string) => {
     if (!name) return ''
-    // For Thai names, if the first char is a leading vowel (เ แ โ ใ ไ), skip it to get the consonant
+    // สำหรับชื่อภาษาไทย ถ้าตัวอักษรแรกเป็นสระนำหน้า (เ แ โ ใ ไ) ให้ข้ามไปเอาพยัญชนะ
     const leadingVowels = ['เ', 'แ', 'โ', 'ใ', 'ไ']
     if (leadingVowels.includes(name.charAt(0)) && name.length > 1) {
       return name.charAt(1)
@@ -36,7 +40,7 @@ const handleImageError = () => {
   imageError.value = true
 }
 
-// Watch for photoURL changes to reset error state
+// รีเซ็ตสถานะข้อผิดพลาดเมื่อรูปโปรไฟล์เปลี่ยน (Watch for photoURL changes to reset error state)
 watch(() => props.photoURL, () => {
   imageError.value = false
 })

Frontend-Learner/components/user/UserMenu.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 /**
  * @file UserMenu.vue
- * @description User profile dropdown menu component using Quasar.
+ * @description คอมโพเนนต์เมนู Dropdown ของโปรไฟล์ผู้ใช้ ใช้ Quasar
  */
 
 import { ref, computed, onMounted } from 'vue'
@@ -12,7 +12,7 @@ const { currentUser, logout } = useAuth()
 const { t } = useI18n()
 const $q = useQuasar()
 
-// Use centralized theme management
+// จัดการการเปลี่ยนธีมแบบรวมศูนย์ (Use centralized theme management)
 const { isDark, set } = useThemeMode()
 
 const isHydrated = ref(false)
@@ -21,7 +21,7 @@ onMounted(() => {
   isHydrated.value = true
 })
 
-// User Initials
+// ตัวอักษรย่อของผู้ใช้ (User Initials)
 const userInitials = computed(() => {
   if (!currentUser.value) return ''
   const f = currentUser.value.firstName?.charAt(0).toUpperCase() || 'U'

Frontend-Learner/composables/useAuth.ts

@@ -40,7 +40,7 @@ export const useAuth = () => {
   // ฟังก์ชันเข้าสู่ระบบ (Login)
   const login = async (credentials: { email: string; password: string }) => {
     try {
-      // API returns { code: 200, message: "...", data: { token, user, ... } }
+      // API returns { code: 200, message: "...", data: { token, refreshToken } }
       const response = await $fetch<any>(`${API_BASE_URL}/auth/login`, {
         method: 'POST',
         body: credentials
@@ -49,16 +49,35 @@ export const useAuth = () => {
       if (response && response.data) {
         const data = response.data
 
-        // Validation: Ensure user and role exist, then check for Role 'STUDENT'
+        // บันทึก Token ก่อน เพื่อใช้เรียก /user/me
-        if (!data.user || !data.user.role || data.user.role.code !== 'STUDENT') {
+        token.value = data.token
+        refreshToken.value = data.refreshToken
+
+        // ดึงข้อมูลผู้ใช้จาก /user/me (เพราะ API login ไม่ส่ง user กลับมาแล้ว)
+        try {
+          const userData = await $fetch<any>(`${API_BASE_URL}/user/me`, {
+            headers: {
+              Authorization: `Bearer ${data.token}`
+            }
+          })
+
+          // Validation: ตรวจสอบ Role ต้องเป็น STUDENT เท่านั้น
+          if (!userData || !userData.role || userData.role.code !== 'STUDENT') {
+            // ถ้า Role ไม่ใช่ STUDENT ให้ล้าง Token ออก
+            token.value = null
+            refreshToken.value = null
             return { success: false, error: 'Email ไม่ถูกต้อง' }
           }
 
-        token.value = data.token
+          // เก็บข้อมูล User ลง Cookie
-        refreshToken.value = data.refreshToken // บันทึก Refresh Token
+          user.value = userData
-        
+        } catch (profileErr) {
-        // API ส่งข้อมูล profile มาใน user object
+          // ดึงข้อมูลผู้ใช้ไม่สำเร็จ ให้ล้าง Token ออก
-        user.value = data.user
+          console.error('Failed to fetch user profile after login:', profileErr)
+          token.value = null
+          refreshToken.value = null
+          return { success: false, error: 'ไม่สามารถดึงข้อมูลผู้ใช้ได้' }
+        }
         
         return { success: true }
       }

Frontend-Learner/composables/useCategory.ts

@@ -1,18 +1,21 @@
-// Interface สำหรับข้อมูลหมวดหมู่ (Category)
+/**
+ * @interface Category
+ * @description โครงสร้างข้อมูลหมวดหมู่ (Category)
+ */
 export interface Category {
   id: number
-  name: {
+  name: { // ชื่อหมวดหมู่รองรับ 2 ภาษา
     th: string
     en: string
     [key: string]: string
   }
-  slug: string
+  slug: string // Slug สำหรับใช้งานบน URL
-  description: {
+  description: { // รายละเอียดหมวดหมู่
     th: string
     en: string
     [key: string]: string
   }
-  icon: string
+  icon: string // ไอคอนของหมวดหมู่อ้างอิงจาก Material Icons
   sort_order: number
   is_active: boolean
   created_at: string
@@ -20,7 +23,7 @@ export interface Category {
 }
 
 export interface CategoryData {
-  total: number
+  total: number // จำนวนหมวดหมู่ทั้งหมด
   categories: Category[]
 }
 
@@ -30,18 +33,24 @@ interface CategoryResponse {
   data: CategoryData
 }
 
-// Composable สำหรับจัดการข้อมูลหมวดหมู่
+/**
+ * @composable useCategory
+ * @description จัดการข้อมูลหมวดหมู่ (Categories) การดึงข้อมูล และการจัดการ Cache (เก็บข้อมูลจำลองชั่วคราว)
+ */
 export const useCategory = () => {
   const config = useRuntimeConfig()
   const API_BASE_URL = config.public.apiBase as string
   const { token } = useAuth()
 
-  // ใช้ useState เพื่อเก็บ Cached Data ระดับ Global (แชร์กันทุก Component)
+  // เก็บ Cache การดึงข้อมูลหมวดหมู่ในระดับ Global (ใช้ข้าม Component ได้โดยไม่ต้องโหลดใหม่)
   const categoriesState = useState<Category[]>('categories_cache', () => [])
   const isLoaded = useState<boolean>('categories_loaded', () => false)
 
-  // ฟังก์ชันดึงข้อมูลหมวดหมู่ทั้งหมด
+  /**
-  // Endpoint: GET /categories
+   * @function fetchCategories
+   * @description ดึงรายการหมวดหมู่ทั้งหมดจาก API (GET /categories) 
+   * หากมีแคชอยู่แล้วจะดึงจาก State ทันที แต่อาจบังคับให้โหลดใหม่ (forceRefresh) ได้
+   */
   const fetchCategories = async (forceRefresh = false) => {
     // ถ้ามีข้อมูลอยู่แล้วและไม่สั่งบังคับโหลดใหม่ ให้ใช้ข้อมูลเดิมทันที
     if (isLoaded.value && !forceRefresh && categoriesState.value.length > 0) {
@@ -62,7 +71,7 @@ export const useCategory = () => {
 
       const categories = response.data?.categories || []
       
-      // เก็บข้อมูลลง State
+      // บันทึกรายการหมวดหมู่ลง State Cache
       categoriesState.value = categories
       isLoaded.value = true
 
@@ -74,9 +83,9 @@ export const useCategory = () => {
     } catch (err: any) {
       console.error('Fetch categories failed:', err)
       
-      // Retry logic for 429 Too Many Requests
+      // กรณีเกิด Error 429 ระบบจะทำการหน่วงเวลา (1.5 วิ) และลองโหลดข้อมูลใหม่อีก 1 ครั้ง (Retry)
       if (err.statusCode === 429 || err.status === 429) {
-          await new Promise(resolve => setTimeout(resolve, 1500)); // Wait 1.5s
+          await new Promise(resolve => setTimeout(resolve, 1500)); // หน่วงเวลา 1.5 วินาที
           try {
                 const retryRes = await $fetch<CategoryResponse>(`${API_BASE_URL}/categories`, {
                   method: 'GET',

Frontend-Learner/composables/useFormValidation.ts

@@ -1,3 +1,7 @@
+/**
+ * @interface ValidationRule
+ * @description กฎการตรวจสอบความถูกต้องของฟิลด์ (เช่น บังคับกรอก, เช็คความยาว, ตรวจอีเมล)
+ */
 export interface ValidationRule {
   required?: boolean
   minLength?: number
@@ -8,10 +12,18 @@ export interface ValidationRule {
   custom?: (value: string) => string | null
 }
 
+/**
+ * @interface FieldErrors
+ * @description รูปแบบการเก็บข้อผิดพลาด (Key ของฟิลด์ คู่กับข้อความแจ้งเตือน)
+ */
 export interface FieldErrors {
   [key: string]: string
 }
 
+/**
+ * @composable useFormValidation
+ * @description ใช้สำหรับตรวจสอบความถูกต้อง (Validate) ของข้อมูลในแบบฟอร์ม
+ */
 export function useFormValidation() {
   const errors = ref<FieldErrors>({})
 
@@ -52,6 +64,7 @@ export function useFormValidation() {
     return null
   }
 
+  // ฟังก์ชันหลักที่เอาแบบฟอร์ม (formData) มาตรวจกับเช็คลิสต์ทั้งหมด (validationRules)
   const validate = (
     formData: Record<string, string>,
     validationRules: Record<string, { rules: ValidationRule; label: string; messages?: Record<string, string> }>
@@ -67,14 +80,18 @@ export function useFormValidation() {
       }
     }
 
+    // บันทึกข้อผิดพลาดที่พบทั้งหมดลงใน State
     errors.value = newErrors
+    // คืนค่าบอกว่า "ฟอร์มนี้ผ่านทั้งหมดไหม" (true คือผ่านหมด)
     return isValid
   }
 
+  // ฟังก์ชันลบข้อผิดพลาดทิ้งทั้งหมด (สำหรับตอนเริ่มกรอกใหม่)
   const clearErrors = () => {
     errors.value = {}
   }
 
+  // ฟังก์ชันลบข้อผิดพลาดเฉพาะฟิลด์ที่กำหนด
   const clearFieldError = (field: string) => {
     if (errors.value[field]) {
       // eslint-disable-next-line @typescript-eslint/no-dynamic-delete

Frontend-Learner/composables/useMediaPrefs.ts

@@ -1,22 +1,27 @@
+/**
+ * @composable useMediaPrefs
+ * @description จัดการตั้งค่าระดับเสียงและสถานะปิดเสียง (Mute) ของวิดีโอ/สื่อ
+ * โดยจะเก็บค่าแยกตามบัญชีผู้ใช้งาน และสั่งประยุกต์ใช้กับ <video> ให้อัตโนมัติ
+ */
 export const useMediaPrefs = () => {
-    // 1. Global State
+    // 1. สถานะส่วนกลาง (Global State)
-    // ใช้ useState เพื่อแชร์ค่าเดียวกันทั่วทั้ง App (เช่น เปลี่ยนหน้าแล้วเสียงยังเท่าเดิม)
+    // ใช้ useState เพื่อแชร์ค่าเดียวกันทั่วหน้าเว็บ (เช่น เปลี่ยนหน้าแล้วระดับเสียงยังคงที่)
     const volume = useState<number>('media_prefs_volume', () => 1)
     const muted = useState<boolean>('media_prefs_muted', () => false)
     
     const { user } = useAuth()
 
-    // 2. Storage Key Helper (User Specific)
+    // 2. ฟังก์ชันช่วยสร้าง Key สำหรับ Storage (เก็บแยกตาม User)
     const getStorageKey = () => {
         const userId = user.value?.id || 'guest'
         return `media:prefs:v1:${userId}`
     }
 
-    // 3. Save Logic (Throttled)
+    // 3. ระบบบันทึกการตั้งค่าลงเบราว์เซอร์ (Throttled เพื่อไม่ให้บันทึกถี่เกินไป)
     let saveTimeout: ReturnType<typeof setTimeout> | null = null
     
     const save = () => {
-        if (import.meta.server) return
+        if (import.meta.server) return // เลี่ยงไม่ได้ต้องทำงานบนฝั่ง Client เท่านั้น
 
         if (saveTimeout) clearTimeout(saveTimeout)
         saveTimeout = setTimeout(() => {
@@ -29,12 +34,12 @@ export const useMediaPrefs = () => {
                 }
                 localStorage.setItem(key, JSON.stringify(data))
             } catch (e) {
-                console.error('Failed to save media prefs', e)
+                console.error('ไม่สามารถบันทึกการตั้งค่าสื่อได้', e)
             }
-        }, 500) // Throttle 500ms
+        }, 500) // หน่วงเวลา 500ms
     }
 
-    // 4. Load Logic
+    // 4. ระบบโหลดการตั้งค่าเก่าขึ้นมา (Load Logic)
     const load = () => {
         if (import.meta.server) return
         
@@ -51,20 +56,20 @@ export const useMediaPrefs = () => {
                 }
             }
         } catch (e) {
-            console.error('Failed to load media prefs', e)
+            console.error('ไม่สามารถโหลดการตั้งค่าสื่อได้', e)
         }
     }
 
-    // 5. Setters (With Logic)
+    // 5. ฟังก์ชันสำหรับอัปเดตและสั่งบันทึกการตั้งค่า (Setters)
     const setVolume = (val: number) => {
         const clamped = Math.max(0, Math.min(1, val))
         volume.value = clamped
         
-        // Auto unmute if volume increased from 0
+        // ยกเลิกปิดเสียงอัตโนมัติ ถ้าระดับเสียงเพิ่มขึ้นจาก 0
         if (clamped > 0 && muted.value) {
             muted.value = false
         }
-        // Auto mute if volume set to 0
+        // ปิดเสียงอัตโนมัติ ถ้าระดับเสียงกลายเป็น 0
         if (clamped === 0 && !muted.value) {
             muted.value = true
         }
@@ -75,7 +80,7 @@ export const useMediaPrefs = () => {
     const setMuted = (val: boolean) => {
         muted.value = val
         
-        // Logic: Unmuting should restore volume if it was 0
+        // หากผู้ใช้กดยกเลิกการปิดเสียงขณะที่ระดับเสียงเคยเป็น 0 ควรตั้งค่าเริ่มต้นให้เป็น 1
         if (!val && volume.value === 0) {
             volume.value = 1
         }
@@ -83,15 +88,15 @@ export const useMediaPrefs = () => {
         save()
     }
 
-    // 6. Apply & Bind to Element (The Magic)
+    // 6. ฟังก์ชันจับคู่ใช้กับการเล่นสื่อ (ตย. <video ref="videoEl"> -> applyTo(videoEl.value))
     const applyTo = (el: HTMLMediaElement | null | undefined) => {
         if (!el) return () => {}
 
-        // Initial Apply
+        // ใส่ค่าตั้งต้นให้กับออบเจ็กต์สื่อ
         el.volume = volume.value
         el.muted = muted.value
 
-        // A. Watch State -> Update Element
+        // A. สังเกตการเปลี่ยนแปลงจาก State -> เพื่อส่งไปอัปเดต Element สื่อ
         const stopVolWatch = watch(volume, (v) => {
             if (Math.abs(el.volume - v) > 0.01) el.volume = v
         })
@@ -99,9 +104,9 @@ export const useMediaPrefs = () => {
             if (el.muted !== m) el.muted = m
         })
 
-        // B. Listen Element -> Update State (e.g. Native Controls)
+        // B. สังเกตการเปลี่ยนแปลงจาก Element (เช่น ผู้ใช้กดปุ่มเร่งเสียงในวิดีโอตรงๆ) -> เพื่อเอาค่ามาอัปเดต State 
         const onVolumeChange = () => {
-            // Update state only if diff allows (prevent loop)
+            // อัปเดตเฉพาะเมื่อมีความแตกต่างเพื่อหลีกเลี่ยง Loop อนันต์
             if (Math.abs(el.volume - volume.value) > 0.01) {
                 volume.value = el.volume
                 save()
@@ -113,7 +118,7 @@ export const useMediaPrefs = () => {
         }
         el.addEventListener('volumechange', onVolumeChange)
 
-        // Cleanup function
+        // ฟังก์ชันล้างค่าเพื่อเลิกติดตาม (Cleanup แบบส่งกลับ (Return))
         return () => {
             stopVolWatch()
             stopMutedWatch()
@@ -121,11 +126,11 @@ export const useMediaPrefs = () => {
         }
     }
 
-    // 7. Lifecycle & Sync
+    // 7. จังหวะวงจรชีวิตตอนโหลดเสร็จและระบบ Sync
     if (import.meta.client) {
         onMounted(() => {
             load()
-            // Cross-tab sync
+            // ระบบ Sync กับแท็บหรือหน้าต่างเดียวกันหากถูกเปิดไว้
             window.addEventListener('storage', (e) => {
                 if (e.key === getStorageKey()) {
                     load()

Frontend-Learner/composables/useNavItems.ts

@@ -1,17 +1,19 @@
 /**
  * @file useNavItems.ts
- * @description Single Source of Truth for navigation items used across the app (Sidebar, Mobile Nav, User Menu).
+ * @description ศูนย์รวมจัดการเมนูนำทาง (Navigation Items) เพื่อให้ใช้ข้อมูลชุดเดียวกันทั้งเว็บ
+ * (เช่น เมนูด้านข้าง, เมนูบนมือถือ, และเมนูโปรไฟล์ผู้ใช้)
  */
 
 export interface NavItem {
-  to: string
+  to: string           // ลิงก์ปลายทาง
-  labelKey: string
+  labelKey: string     // คีย์ภาษาสำหรับ i18n
-  icon: string
+  icon: string         // ไอคอนจาก Material Icons
-  showOn: ('sidebar' | 'mobile' | 'userMenu')[]
+  showOn: ('sidebar' | 'mobile' | 'userMenu')[] // กำหนดให้โชว์ที่ส่วนไหนบ้าง
-  roles?: string[]
+  roles?: string[]     // กำหนดสิทธิ์ผู้ใช้ที่จะเห็น (ถ้ามี)
 }
 
 export const useNavItems = () => {
+  // เมนูทั้งหมดในระบบ กำหนดไว้ที่เดียว
   const allNavItems: NavItem[] = [
     {
       to: '/dashboard',
@@ -63,6 +65,7 @@ export const useNavItems = () => {
     }
   ]
 
+  // คัดกรองเมนูที่จะเอาไปแสดงแต่ละตำแหน่ง
   const sidebarItems = computed(() => allNavItems.filter(item => item.showOn.includes('sidebar')))
   const mobileItems = computed(() => allNavItems.filter(item => item.showOn.includes('mobile')))
   const userMenuItems = computed(() => allNavItems.filter(item => item.showOn.includes('userMenu')))

Frontend-Learner/composables/useQuizRunner.ts

@@ -19,95 +19,107 @@ export interface AnswerState {
 
 /**
  * @composable useQuizRunner
- * @description Manages the state and logic for running a quiz activity.
+ * @description จัดการ State (สถานะ) และ Logic สำหรับการทำแบบทดสอบ (Quiz)
+ * ครอบคลุมการแสดงคำถาม, บันทึกคำตอบ, และตรวจสอบการข้ามคำถาม
  */
 export const useQuizRunner = () => {
-  // State
+  // ================= State (สถานะเก็บค่าต่างๆ ของข้อสอบ) =================
-  const questions = useState<QuizQuestion[]>('quiz-questions', () => []);
+  const questions = useState<QuizQuestion[]>('quiz-questions', () => []); // เก็บรายการคำถามทั้งหมด
-  const answers = useState<Record<number, AnswerState>>('quiz-answers', () => ({}));
+  const answers = useState<Record<number, AnswerState>>('quiz-answers', () => ({})); // เก็บคำตอบที่ผู้ใช้ตอบ แยกตาม ID คำถาม
-  const currentQuestionIndex = useState<number>('quiz-current-index', () => 0);
+  const currentQuestionIndex = useState<number>('quiz-current-index', () => 0); // ลำดับคำถามที่กำลังทำอยู่ปัจจุบัน (เริ่มที่ 0)
-  const loading = useState<boolean>('quiz-loading', () => false);
+  const loading = useState<boolean>('quiz-loading', () => false); // สถานะตอนกำลังกดเซฟหรือโหลดข้อมูล
-  const lastError = useState<string | null>('quiz-error', () => null);
+  const lastError = useState<string | null>('quiz-error', () => null); // เก็บข้อความแจ้งเตือนข้อผิดพลาดล่าสุด
 
-  // Getters
+  // ================= Getters (ดึงค่าที่ถูกประมวลผลแล้ว) =================
-  const currentQuestion = computed(() => questions.value[currentQuestionIndex.value]);
+  const currentQuestion = computed(() => questions.value[currentQuestionIndex.value]); // ดึงคำถามข้อปัจจุบัน
   
-  const currentAnswer = computed(() => {
+  const currentAnswer = computed(() => { // ดึงคำตอบในข้อปัจจุบัน
     if (!currentQuestion.value) return null;
     return answers.value[currentQuestion.value.id];
   });
 
-  const totalQuestions = computed(() => questions.value.length);
+  const totalQuestions = computed(() => questions.value.length); // จำนวนคำถามทั้งหมดในแบบทดสอบ
-  const isLastQuestion = computed(() => currentQuestionIndex.value === questions.value.length - 1);
+  const isLastQuestion = computed(() => currentQuestionIndex.value === questions.value.length - 1); // เช็คว่าใช่คำถามข้อสุดท้ายหรือไม่
-  const isFirstQuestion = computed(() => currentQuestionIndex.value === 0);
+  const isFirstQuestion = computed(() => currentQuestionIndex.value === 0); // เช็คว่าใช่คำถามข้อแรกหรือไม่
 
-  // Actions
+  // ================= Actions (ฟังก์ชันหลักสำหรับการทำงาน) =================
+  
+  // ฟังก์ชันเริ่มต้นสร้าง/โหลดข้อสอบ (กำหนดโครงสร้างพื้นฐาน)
   function initQuiz(quizData: any) {
     if (!quizData || !quizData.questions) return;
     
     questions.value = quizData.questions; 
-    currentQuestionIndex.value = 0;
+    currentQuestionIndex.value = 0; // รีเซ็ตไปที่ข้อ 1 ใหม่
     answers.value = {};
     lastError.value = null;
 
+    // เตรียมโครงสร้างคำตอบรองรับทุกข้อ
     questions.value.forEach(q => {
       answers.value[q.id] = {
         questionId: q.id,
         value: null,
-        is_saved: false,
+        is_saved: false, // บันทึกและส่ง API เรียบร้อยหรือยัง
-        status: 'not_started',
+        status: 'not_started', // สถานะเริ่มต้นของคำถาม
-        touched: false,
+        touched: false, // ผู้ใช้เคยเปิดเข้ามาดูข้อนีัหรือยัง
       };
     });
 
+    // เริ่มต้นบันทึกเวลา/เข้าสู่ข้อที่ 1 ทันทีเมื่ออธิบายเสร็จ
     if (questions.value.length > 0) {
       enterQuestion(questions.value[0].id);
     }
   }
 
+  // ฟังก์ชันสลับสถานะเมื่อกดเข้ามาที่คำถามนั้นๆ
   function enterQuestion(qId: number) {
     const ans = answers.value[qId];
     if (ans) {
       ans.touched = true;
       if (ans.status === 'not_started' || ans.status === 'skipped') {
-         ans.status = 'in_progress';
+         ans.status = 'in_progress'; // เปลี่ยนสถานะเป็น 'กำลังทำ'
       }
     }
   }
 
+  // ตรวจสอบเงื่อนไขว่าผู้ใช้สามารถออกจากคำถามปัจจุบันไปยังข้ออื่นได้หรือไม่
   function canLeaveCurrent(): { allowed: boolean; reason?: string } {
     if (!currentQuestion.value) return { allowed: true };
     const q = currentQuestion.value;
     const a = answers.value[q.id];
     
+    // สามารถออกได้ถ้าคำถามทำถูกหรือโจทย์อนุญาตให้ข้ามได้
     if (a.status === 'completed' || a.is_saved) return { allowed: true };
     if (q.is_skippable) return { allowed: true };
     
+    // บังคับให้ตอบถ้าไม่ได้อนุญาตให้ข้าม และไม่ได้ตอบ
     if (!a.is_saved && a.value === null) {
-      return { allowed: false, reason: 'This question is required.' };
+      return { allowed: false, reason: 'ต้องการคำตอบสำหรับข้อบังคับนี้' };
     }
 
     return { allowed: true };
   }
 
+  // ฟังก์ชันอัปเดตค่าตัวเลือกที่ผู้ใช้กดเลือกในข้อปัจจุบัน
   function updateAnswer(val: any) {
      if (!currentQuestion.value) return;
      const qId = currentQuestion.value.id;
      answers.value[qId].value = val;
      
+     // หากมีแก้ไขคำตอบหลังจากกดเซฟไปแล้ว ให้เปลี่ยนสถานะให้ระบบรู้ว่าต้องเซฟใหม่
      if (answers.value[qId].is_saved) {
         answers.value[qId].is_saved = false;
         answers.value[qId].status = 'in_progress'; 
      }
   }
 
+  // ล็อกและบันทึกข้อสอบเมื่อกดปุ่ม "ตกลง/ส่งคำตอบ" สำหรับข้อนั้นๆ
   async function saveCurrentAnswer() {
     if (!currentQuestion.value) return;
     const qId = currentQuestion.value.id;
     const ans = answers.value[qId];
 
     if (ans.value === null) {
-      lastError.value = "Please provide an answer.";
+      lastError.value = "กรุณาเลือกคำตอบอย่างน้อย 1 ตัวเลือก";
       return false;
     }
 
@@ -115,30 +127,34 @@ export const useQuizRunner = () => {
     lastError.value = null;
 
     try {
+      // หมายเหตุ: การเชื่อมต่อ API หลักต้องทำที่ไฟล์ component, ตัวนี้จัดการแค่เรื่อง State
       ans.is_saved = true;
-      ans.status = 'completed';
+      ans.status = 'completed'; // มาร์คว่าเป็นข้อที่ทำเสร็จแล้ว
       ans.last_saved_at = new Date().toISOString();
       return true;
     } catch (e) {
-      lastError.value = "Failed to save answer.";
+      lastError.value = "เกิดข้อผิดพลาดในการบันทึกคำตอบ";
       return false;
     } finally {
       loading.value = false;
     }
   }
 
+  // วินิจฉัยก่อนสั่งผู้ใช้ย้ายไปยังคำถามอื่นหน้าอื่นตามดัชนีระบุ
   function handleLeaveLogic(targetIndex: number) {
     if (targetIndex === currentQuestionIndex.value) return;
 
+    // ตรวจสอบขั้นสุดท้าย ป้องกันคนคลิกแอบหนีข้อที่บังคับทำ
     const check = canLeaveCurrent();
     if (!check.allowed) {
-      lastError.value = check.reason || "Required question.";
+      lastError.value = check.reason || "จำเป็นต้องตอบข้อนี้ก่อนข้าม";
       return false;
     }
 
     const currQ = currentQuestion.value;
     if (currQ) {
         const currAns = answers.value[currQ.id];
+        // หากผู้ใช้ทิ้งขว้างโดยที่ไม่บังคับ ให้ทิ้งสถานะเป็นข้าม ('skipped')
         if (currAns.status !== 'completed' && !currAns.is_saved) {
           currAns.status = 'skipped';
         }
@@ -147,6 +163,7 @@ export const useQuizRunner = () => {
     currentQuestionIndex.value = targetIndex;
     lastError.value = null;
 
+    // ติดตามสถานะ 'touched' ในข้อใหม่ที่เข้าไปล่าสุด
     if (questions.value[targetIndex]) {
        enterQuestion(questions.value[targetIndex].id);
     }

Frontend-Learner/composables/useThemeMode.ts

@@ -1,26 +1,41 @@
 import { useQuasar } from 'quasar'
 
+/**
+ * @composable useThemeMode
+ * @description จัดการระบบโหมดสว่าง/มืด (Light/Dark Theme) ของแพลตฟอร์ม
+ * ครอบคลุมการสั่งบันทึกการตั้งค่า, เปลี่ยนคลาส Tailwind และ Sync ซิงก์กับ Quasar UI
+ */
 export const useThemeMode = () => {
   const $q = useQuasar()
 
-  // deterministic on SSR: default = light
+  // สถานะเริ่มต้นของโหมดมืด (สำหรับการทำ SSR ถูกเซ็ตเป็น false (สว่าง) ไว้ก่อน)
   const isDark = useState<boolean>('theme:isDark', () => false)
 
+  // ฟังก์ชันใช้คลาสกับ Tag <html> เพื่อให้ Tailwind หรือ CSS รันโหมดมืด
   const applyTheme = (value: boolean) => {
-    if (!process.client) return
+    if (!process.client) return // หากทำงานฝั่งเซิร์ฟเวอร์ จะไม่สั่งให้รัน DOM
+    
+    // สลับคลาส 'dark' หรือปิด
     document.documentElement.classList.toggle('dark', value)
+    
+    // สั่งให้ Quasar (UI Framework) ปรับโหมดสีให้ตรงกัน (มืด/สว่าง)
     $q.dark.set(value)
+    
+    // บันทึกการตั้งค่าลงเครื่องระยะยาวเบราว์เซอร์
     localStorage.setItem('theme', value ? 'dark' : 'light')
   }
 
 
 
+  // จับตาดูเมื่อตัวแปรเปลี่ยนค่าค่อยทำการเปลี่ยนโหมดบนหน้าจอ
   watch(isDark, (v) => applyTheme(v))
 
+  // ฟังก์ชันสั่งสลับโหมด ไปมา (Toggle)
   const toggle = () => {
     isDark.value = !isDark.value
   }
 
+  // ฟังก์ชันสำหรับกำหนดตั้งค่าโหมดแบบเจาะจง
   const set = (v: boolean) => {
     isDark.value = v
   }

Frontend-Learner/constants/landing.ts

@@ -1,6 +1,6 @@
 /**
  * @file landing.ts
- * @description Static data for the landing page.
+ * @description ข้อมูลคงที่ (Static data) แบบจำลองที่เอาไว้แสดงผลบนหน้า Landing page
  */
 
 export const CATEGORY_CARDS = [

Frontend-Learner/i18n/locales/en.json

@@ -117,7 +117,11 @@
     "foundTotal": "Found Total",
     "items": "items",
     "subtitle": "Choose to learn new skills from our curated quality courses",
-    "searchBtn": "Search"
+    "searchBtn": "Search",
+    "allCategory": "All",
+    "byInstructor": "by",
+    "students": "students",
+    "viewDetails": "View Details"
   },
   "myCourses": {
     "title": "My Courses",

Frontend-Learner/i18n/locales/th.json

@@ -117,7 +117,11 @@
     "foundTotal": "พบทั้งหมด",
     "items": "รายการ",
     "subtitle": "เลือกเรียนรู้ทักษะใหม่ๆ จากหลักสูตรคุณภาพที่คัดสรรมาเพื่อคุณ",
-    "searchBtn": "ค้นหา"
+    "searchBtn": "ค้นหา",
+    "allCategory": "ทั้งหมด",
+    "byInstructor": "โดย",
+    "students": "นักเรียน",
+    "viewDetails": "ดูรายละเอียด"
   },
   "myCourses": {
     "title": "คอร์สของฉัน",

Frontend-Learner/layouts/auth.vue

@@ -19,7 +19,7 @@ onMounted(() => {
 </script>
 
 <template>
-  <!-- Auth Shell: Wrapper for authentication pages (Login, Register, etc.) -->
+  <!-- Auth Shell: ครอบคลุมการแสดงผลหน้าสำหรับเข้าสู่ระบบหรือสมัครสมาชิก -->
   <div class="auth-shell bg-white w-full min-h-screen">
     <slot />
   </div>

Frontend-Learner/layouts/dashboard-index.vue

@@ -1,11 +1,11 @@
 <script setup lang="ts">
 /**
  * @file dashboard-index.vue
- * @description Layout for the Dashboard Index page, without the sidebar.
+ * @description เลย์เอาต์สำหรับหน้าแรกของ Dashboard (ไม่มีแผงเมนูด้านข้างเพื่อเน้นพื้นที่เนื้อหา)
- * Uses Quasar QLayout for responsive structure.
+ * ใช้โครงสร้างจาก Quasar QLayout เพื่อให้รองรับ Responsive
  */
 
-// Initialize global theme management
+// เปิดใช้คอมโพสซิเบิลจัดการธีมแบบ Global
 useThemeMode()
 
 const { currentUser, logout } = useAuth()
@@ -18,7 +18,7 @@ const toggleRightDrawer = () => {
 
 <template>
   <q-layout view="hHh lpR fFf" class="bg-slate-50 dark:!bg-[#020617] text-slate-900 dark:!text-slate-50">
-    <!-- Header -->
+    <!-- แถบด้านบนของโครงสร้าง (Header) -->
     <q-header
       class="bg-white/80 dark:!bg-[#0f172a]/80 backdrop-blur-md text-slate-900 dark:!text-white"
     >
@@ -29,7 +29,7 @@ const toggleRightDrawer = () => {
       />
     </q-header>
 
-    <!-- Master Mobile Drawer (The Everything Hub) -->
+    <!-- แถบลิ้นชักมือถือหลัก (เมนูรวมทุกอย่างเมื่อปัดหน้าจอ/กดไอคอนบนสัดส่วนเล็ก) -->
     <q-drawer
       v-model="rightDrawerOpen"
       side="right"
@@ -39,7 +39,7 @@ const toggleRightDrawer = () => {
       :width="300"
     >
       <div class="flex flex-col h-full bg-white dark:bg-[#0f172a]">
-        <!-- 1. Account Section (Premium Look) -->
+        <!-- 1. ส่วนบัญชีผู้ใช้ (Account Section) ดีไซน์พรีเมียม -->
         <div class="p-6 bg-slate-50/50 dark:bg-slate-800/30 border-b border-slate-100 dark:border-slate-800">
           <div class="flex items-center justify-between mb-8">
              <div class="flex items-center gap-3">
@@ -62,10 +62,10 @@ const toggleRightDrawer = () => {
           </div>
         </div>
 
-        <!-- 2. Integrated Content Hub -->
+        <!-- 2. ศูนย์รวมเมนูและเนื้อหา (Integrated Content Hub) -->
         <div class="flex-grow overflow-y-auto pt-4">
           <q-list padding class="text-slate-600 dark:text-slate-300">
-            <!-- Navigation -->
+            <!-- การนำทาง (Navigation) -->
             <q-item-label header class="text-[11px] font-black tracking-[0.2em] text-slate-400 uppercase px-6 pb-2">เมนูหลัก</q-item-label>
             
             <q-item to="/dashboard" clickable v-ripple class="px-6 py-4" active-class="bg-blue-50 text-blue-600 dark:bg-blue-900/20 dark:text-blue-400 font-bold" @click="rightDrawerOpen = false">
@@ -85,10 +85,10 @@ const toggleRightDrawer = () => {
 
             <q-separator class="my-4 mx-6 opacity-50" />
 
-            <!-- Tools & Settings -->
+            <!-- เครื่องมือทั่วไปและการตั้งค่าระบบ -->
             <q-item-label header class="text-[11px] font-black tracking-[0.2em] text-slate-400 uppercase px-6 pb-2">เครื่องมือและการตั้งค่า</q-item-label>
             
-            <!-- Language Selection -->
+            <!-- ปุ่มสลับภาษา -->
             <q-item class="px-6 py-2">
               <q-item-section avatar><q-icon name="language" size="22px" /></q-item-section>
               <q-item-section>
@@ -99,7 +99,7 @@ const toggleRightDrawer = () => {
               </q-item-section>
             </q-item>
 
-            <!-- Dark Mode Toggle -->
+            <!-- เปิดปิดโหมดมืด (Dark Mode Toggle) -->
             <q-item class="px-6 py-2">
               <q-item-section avatar><q-icon :name="isDark ? 'dark_mode' : 'light_mode'" size="22px" /></q-item-section>
               <q-item-section>
@@ -121,7 +121,7 @@ const toggleRightDrawer = () => {
           </q-list>
         </div>
 
-        <!-- 3. Bottom Actions -->
+        <!-- 3. ส่วนล่างสุด เช่น ล็อกเอาต์ หรือระบุเวอร์ชันระบบ -->
         <div class="p-6 mt-auto border-t border-slate-100 dark:border-slate-800">
           <q-btn
             unelevated
@@ -138,18 +138,16 @@ const toggleRightDrawer = () => {
       </div>
     </q-drawer>
 
-    <!-- Sidebar Removed for this layout -->
+    <!-- หมายเหตุ: สำหรับหน้านี้ จะไม่ได้มีการโชว์ Sidebar ที่เป็นลิ้นชักซ้าย -->
 
-    <!-- Main Content -->
+    <!-- พื้นที่แสดงเนื้อหาหลัก -->
     <q-page-container>
       <q-page class="relative">
         <slot />
       </q-page>
     </q-page-container>
 
-    <!-- Mobile Bottom Nav - Optional, keeping it consistent with default but maybe not needed if full width?
+    <!-- เมนูปุ่มกดล่างหน้าจอบนมือถือ (สำหรับช่วยให้เข้าถึงหน้าหลักได้ไวขึ้น) -->
-         If we remove sidebar, we might still want mobile nav if it's main navigation.
-         Let's keep it for now as it doesn't hurt. -->
     <q-footer
       v-if="$q.screen.lt.md"
       class="!bg-white dark:!bg-[#1e293b] text-primary"

Frontend-Learner/layouts/default.vue

@@ -1,7 +1,8 @@
 <script setup lang="ts">
 /**
  * @file default.vue
- * @description Master layout for the EduLearn platform.
+ * @description เลย์เอาต์หลัก (Master Layout) สำหรับผู้ใช้งานที่เข้าสู่ระบบแล้ว 
+ * ประกอบด้วยแถบเมนูด้านบน (Header), แถบเมนูด้านข้าง (Sidebar) และพื้นที่เนื้อหา
  */
 
 useThemeMode()
@@ -13,7 +14,7 @@ const toggleLeftDrawer = () => {
 }
 
 const route = useRoute()
-// Show sidebar for these routes
+// ระบุว่า path ไหนบ้างที่ให้แสดงแถบเมนูด้านข้าง (Sidebar)
 const isDashboardRoute = computed(() => {
   const routes = ['/dashboard', '/browse', '/classroom', '/course']
   return routes.some(r => route.path.startsWith(r))
@@ -23,14 +24,14 @@ const isDashboardRoute = computed(() => {
 <template>
   <q-layout view="lHh Lpr lFf" class="bg-[#F8FAFC] dark:!bg-[#020617] text-slate-900 dark:!text-slate-50">
     
-    <!-- Header -->
+    <!-- ส่วนหัว (Header) -->
     <q-header
       class="bg-transparent text-slate-900 dark:!text-white border-none shadow-none"
     >
       <AppHeader @toggleSidebar="toggleLeftDrawer" />
     </q-header>
 
-    <!-- Navigation Sidebar -->
+    <!-- แถบเมนูด้านข้าง (Navigation Sidebar) -->
     <q-drawer
       v-model="leftDrawerOpen"
       show-if-above
@@ -42,7 +43,7 @@ const isDashboardRoute = computed(() => {
       <AppSidebar />
     </q-drawer>
 
-    <!-- Main Content Area -->
+    <!-- พื้นที่แสดงเนื้อหาหลัก (Main Content Area) -->
     <q-page-container>
       <q-page class="px-3 py-6 md:p-8">
         <div class="max-w-[1600px] mx-auto">

Frontend-Learner/layouts/landing.vue

@@ -23,20 +23,20 @@ onMounted(() => {
   <q-layout view="lHh LpR lFf" class="bg-white text-slate-900">
 
     
-    <!-- Header (Transparent & Overlay) -->
+    <!-- ส่วนหัวของเพจ (แบบโปร่งใส และซ้อนทับให้โชว์เนื้อหาพื้นหลังได้) -->
     <q-header class="bg-transparent" style="height: auto;">
       <LandingHeader />
     </q-header>
 
-    <!-- Main Content -->
+    <!-- ส่วนเนื้อหาหลัก -->
-    <!-- padding-top: 0 forces content to go under the header (Hero effect) -->
+    <!-- แทรก style padding-top: 0 บังคับให้เนื้อหาใต้ Header ชนชิดด้านบนสุด (ทำเป็น Hero section สวยๆ) -->
     <q-page-container style="padding-top: 0 !important;">
       <q-page>
         <slot />
       </q-page>
     </q-page-container>
 
-    <!-- Footer -->
+    <!-- ส่วนท้ายของเพจ -->
     <LandingFooter />
 
 

Frontend-Learner/package.json

@@ -19,9 +19,14 @@
   },
   "devDependencies": {
     "@nuxt/eslint-config": "^1.12.1",
+    "@nuxt/test-utils": "^4.0.0",
     "@nuxtjs/i18n": "^10.2.1",
+    "@playwright/test": "^1.58.2",
     "@types/node": "^22.19.8",
+    "@vue/test-utils": "^2.4.6",
     "eslint": "^9.39.2",
-    "typescript": "^5.4.5"
+    "jsdom": "^28.1.0",
+    "typescript": "^5.4.5",
+    "vitest": "^4.0.18"
   }
 }

Frontend-Learner/pages/auth/login.vue

@@ -23,7 +23,7 @@ const isLoading = ref(false)
 const rememberMe = ref(false)
 const showPassword = ref(false)
 
-// Form data model
+// ข้อมูลฟอร์มสำหรับเก็บค่าอีเมลและรหัสผ่าน
 const loginForm = reactive({
   email: '',
   password: ''
@@ -31,7 +31,7 @@ const loginForm = reactive({
 
 type LoginField = keyof typeof loginForm
 
-// Validation rules definition
+// การตั้งค่ากฎการตรวจสอบ (Validation Rules)
 // กำหนดกฎการตรวจสอบข้อมูล (Validation Rules)
 const loginRules = {
   email: {
@@ -108,12 +108,12 @@ const handleLogin = async () => {
   }
 
 
-  // Show error on specific fields
+  // แสดงข้อผิดพลาดตามช่องหรือแสดงข้อผิดพลาดรวม (เพื่อความปลอดภัย)
-  // Show generic error for security (or specific if role mismatch)
+  // กรณีเข้าสู่ระบบไม่สำเร็จ
   if (result.error === 'Email ไม่ถูกต้อง') {
-     errors.value.email = result.error // Role mismatch case
+     errors.value.email = result.error // กรณี Role ไม่ตรงกัน
   } else {
-     // Generic login failure (401, 404, etc.)
+     // ข้อผิดพลาดแบบเหมาสำหรับปัญหาการเข้าสู่ระบบทั่วไป (เช่น รหัสผิด, ไม่พบผู้ใช้)
      const msg = 'กรุณาเช็ค Email หรือ รหัสผ่านใหม่อีกครั้ง'
      errors.value.email = msg
      errors.value.password = msg
@@ -147,7 +147,7 @@ onMounted(() => {
      ========================================== -->
     <div class="w-full max-w-[460px] relative z-10 slide-up">
       
-       <!-- Header / Logo -->
+       <!-- ส่วนหัวโปรไฟล์ / โลโก้ (Header / Logo) -->
        <div class="text-center mb-8">
           <div class="inline-flex items-center justify-center w-14 h-14 rounded-2xl bg-gradient-to-tr from-blue-600 to-indigo-600 text-white shadow-lg shadow-blue-600/20 mb-6">
              <span class="font-black text-2xl">E</span>
@@ -158,10 +158,10 @@ onMounted(() => {
 
       <div class="bg-white rounded-[2rem] p-8 md:p-10 shadow-xl shadow-slate-200/50 border border-slate-100 relative overflow-hidden">
         
-        <!-- Form -->
+        <!-- ฟอร์มเข้าสู่ระบบ (Login Form) -->
         <form @submit.prevent="handleLogin" class="flex flex-col gap-5">
           
-          <!-- Email Input -->
+          <!-- ช่องกรอกอีเมล (Email Input) -->
           <div>
             <label class="block text-sm font-semibold text-slate-700 mb-2 ml-1">อีเมล</label>
             <div class="relative group">
@@ -180,7 +180,7 @@ onMounted(() => {
             <span v-if="errors.email" class="text-xs text-red-500 font-medium ml-1 mt-1 block slide-up-sm">{{ errors.email }}</span>
           </div>
 
-          <!-- Password Input -->
+          <!-- ช่องกรอกรหัสผ่าน (Password Input) -->
           <div>
             <label class="block text-sm font-semibold text-slate-700 mb-2 ml-1">รหัสผ่าน</label>
             <div class="relative group">
@@ -206,7 +206,7 @@ onMounted(() => {
             <span v-if="errors.password" class="text-xs text-red-500 font-medium ml-1 mt-1 block slide-up-sm">{{ errors.password }}</span>
           </div>
 
-          <!-- Options -->
+          <!-- ตัวเลือกเพิ่มเติม (จดจำฉัน, ลืมรหัสผ่าน) (Options) -->
           <div class="flex items-center justify-between mt-1">
              <label class="flex items-center gap-2.5 cursor-pointer group select-none">
                <div class="relative flex items-center">
@@ -227,7 +227,7 @@ onMounted(() => {
              </NuxtLink>
           </div>
 
-          <!-- Submit Button -->
+          <!-- ปุ่มยืนยันเข้าสู่ระบบ (Submit Button) -->
           <button 
             type="submit" 
             :disabled="isLoading"
@@ -237,7 +237,7 @@ onMounted(() => {
             <div v-else class="w-5 h-5 border-2 border-white/30 border-t-white rounded-full animate-spin"></div>
           </button>
 
-          <!-- Test Credentials Box -->
+          <!-- กล่องแนะนำบัญชีสำหรับทดสอบ (Test Credentials Box) -->
           <div class="mt-4 p-5 bg-blue-50/50 border border-blue-100 rounded-2xl flex flex-col items-center gap-2 animate-fade-in">
              <div class="text-[11px] font-black uppercase tracking-[0.2em] text-blue-600 mb-1">บัญชีสำหรับทดสอบ (Test Account)</div>
              <div class="flex flex-col items-center gap-1">
@@ -253,7 +253,7 @@ onMounted(() => {
 
         </form>
 
-        <!-- Register Link -->
+        <!-- ลิงก์สำหรับสมัครสมาชิกใหม่ (Register Link) -->
         <div class="text-center mt-8">
             <p class="text-slate-600 text-sm">
                ยังไม่มีบัญชีสมาชิก? 
@@ -265,7 +265,7 @@ onMounted(() => {
 
       </div>
 
-      <!-- Back Link -->
+      <!-- ลิงก์ย้อนกลับ (Back Link) -->
        <div class="mt-8 text-center text-slate-500">
            <NuxtLink to="/" class="inline-flex items-center gap-2 text-sm font-medium hover:text-slate-800 transition-colors group px-4 py-2 rounded-lg hover:bg-white/50">
              <span class="group-hover:-translate-x-1 transition-transform">←</span> กลับไปหน้าแรก
@@ -276,7 +276,7 @@ onMounted(() => {
 </template>
 
 <style scoped>
-/* Animations */
+/* เอฟเฟกต์การเคลื่อนไหว (Animations) */
 @keyframes pulse-slow {
   0%, 100% { opacity: 0.3; transform: scale(1); }
   50% { opacity: 0.5; transform: scale(1.15); }

Frontend-Learner/pages/browse/discovery.vue

@@ -27,7 +27,7 @@ const sortBy = ref('ยอดนิยม');
 const sortOptions = ['ยอดนิยม', 'ล่าสุด', 'ราคาต่ำ-สูงสุด', 'ราคาสูง-ต่ำสุด'];
 
 const categories = ref<any[]>([]);
-const courses = ref<any[]>([]);
+const allCourses = ref<any[]>([]);  // เก็บคอร์สทั้งหมดเพื่อกรอง client-side
 const selectedCourse = ref<any>(null);
 
 const isLoading = ref(false);
@@ -76,20 +76,17 @@ const loadCategories = async () => {
   if (res.success) categories.value = res.data || [];
 };
 
-const loadCourses = async (page = 1) => {
+const loadCourses = async () => {
   isLoading.value = true;
-  const categoryId = activeCategory.value === 'all' ? undefined : activeCategory.value as number;
 
+  // โหลดคอร์สทั้งหมดครั้งเดียว (limit สูงๆ เพื่อ client-side filter)
   const res = await fetchCourses({
-    category_id: categoryId,
+    limit: 500,
-    search: searchQuery.value,
-    page: page,
-    limit: itemsPerPage,
     forceRefresh: true,
   });
 
   if (res.success) {
-    courses.value = (res.data || []).map(c => {
+    allCourses.value = (res.data || []).map(c => {
        const cat = categories.value.find(cat => cat.id === c.category_id);
        return {
           ...c,
@@ -100,12 +97,33 @@ const loadCourses = async (page = 1) => {
           reviews_count: c.total_lessons ? c.total_lessons * 123 : Math.floor(Math.random() * 2000) + 100
        }
     });
-    totalPages.value = res.totalPages || 1;
-    currentPage.value = res.page || 1;
   }
   isLoading.value = false;
 };
 
+// Computed: กรองคอร์สแบบ real-time ตาม searchQuery + activeCategory
+const filteredCourses = computed(() => {
+  let result = allCourses.value;
+
+  // กรองตามหมวดหมู่
+  if (activeCategory.value !== 'all') {
+    result = result.filter(c => c.category_id === activeCategory.value);
+  }
+
+  // กรองตามคำค้นหา (ค้นจากชื่อทั้ง th และ en)
+  if (searchQuery.value.trim()) {
+    const query = searchQuery.value.trim().toLowerCase();
+    result = result.filter(c => {
+      const titleTh = (c.title?.th || '').toLowerCase();
+      const titleEn = (c.title?.en || '').toLowerCase();
+      const titleStr = (typeof c.title === 'string' ? c.title : '').toLowerCase();
+      return titleTh.includes(query) || titleEn.includes(query) || titleStr.includes(query);
+    });
+  }
+
+  return result;
+});
+
 const selectCourse = async (id: number) => {
   isLoadingDetail.value = true;
   selectedCourse.value = null;
@@ -137,10 +155,10 @@ watch(
   activeCategory,
   () => {
     currentPage.value = 1;
-    loadCourses(1);
   }
 );
 
+
 onMounted(async () => {
   await loadCategories();
   
@@ -150,7 +168,7 @@ onMounted(async () => {
     activeCategory.value = Number(route.query.category_id);
   }
   
-  await loadCourses(1);
+  await loadCourses();
 
   if (route.query.course_id) {
     selectCourse(Number(route.query.course_id));
@@ -162,19 +180,19 @@ onMounted(async () => {
   <div class="bg-[#F8F9FA] dark:bg-[#020617] min-h-screen p-4 md:p-8 transition-colors duration-300">
     <div class="max-w-[1240px] mx-auto">
         <!-- ส่วนของการค้นหาคอร์ส (Catalog View) -->
-        <div v-if="!showDetail" class="bg-white dark:bg-slate-900 rounded-[2rem] p-6 md:p-8 shadow-[0_2px_15px_rgb(0,0,0,0.02)] border border-slate-100 dark:border-slate-800 min-h-[500px] mb-12">
+        <div v-if="!showDetail" class="bg-white dark:!bg-slate-900 rounded-[2rem] p-6 md:p-8 shadow-[0_2px_15px_rgb(0,0,0,0.02)] border border-slate-100 dark:!border-slate-800 min-h-[500px] mb-12 transition-colors">
             
             <!-- ส่วนหัวและการค้นหา -->
             <div class="flex flex-col md:flex-row md:items-center justify-between gap-6 mb-8">
-               <h2 class="text-[1.35rem] font-bold text-slate-900 dark:text-white tracking-tight">คอร์สเรียนทั้งหมด</h2>
+               <h2 class="text-[1.35rem] font-bold text-slate-900 dark:text-[#f8fafc] tracking-tight">{{ $t('discovery.title') }}</h2>
                <div class="flex flex-wrap sm:flex-nowrap items-center gap-3 w-full md:w-auto">
                   <div class="relative w-full sm:w-[260px] flex-1">
-                     <q-icon name="search" size="18px" class="absolute left-4 top-1/2 -translate-y-1/2 text-slate-400 group-focus-within:text-[#3B6BE8]" />
+                     <q-icon name="search" size="18px" class="absolute left-4 top-1/2 -translate-y-1/2 text-slate-400" />
-                     <input v-model="searchQuery" @keyup.enter="loadCourses(1)" class="w-full bg-slate-100 dark:bg-slate-800 border-none rounded-xl py-2.5 pl-11 pr-4 text-sm font-medium text-slate-700 dark:text-slate-200 placeholder:text-slate-400 focus:ring-2 focus:ring-blue-500/20 outline-none transition-all shadow-sm" placeholder="ค้นหาคอร์ส..." />
+                     <input v-model="searchQuery" class="w-full bg-slate-100 dark:bg-slate-800 border-none rounded-xl py-2.5 pl-11 pr-4 text-sm font-medium text-slate-700 dark:text-slate-200 placeholder:text-slate-400 focus:ring-2 focus:ring-blue-500/20 outline-none transition-all shadow-sm" :placeholder="$t('discovery.searchPlaceholder')" />
                   </div>
                   <div class="flex items-center gap-2 shrink-0">
-                     <button @click="viewMode = 'grid'" :class="viewMode === 'grid' ? 'bg-[#E9EFFD] dark:bg-blue-900/40 text-[#3B6BE8] border-[#3B6BE8]' : 'bg-white border-slate-200 dark:bg-slate-800 dark:border-slate-700 text-slate-400 hover:bg-slate-50'" class="w-[42px] h-[42px] flex items-center justify-center rounded-xl border transition-colors outline-none"><q-icon name="grid_view" size="20px" /></button>
+                     <button @click="viewMode = 'grid'" :class="viewMode === 'grid' ? 'bg-[#E9EFFD] dark:!bg-blue-900/40 text-[#3B6BE8] dark:!text-blue-400 border-[#3B6BE8] dark:!border-blue-400' : 'bg-white border-slate-200 dark:!bg-slate-800 dark:!border-slate-700 text-slate-400 dark:!text-slate-300 hover:bg-slate-50 dark:hover:!bg-slate-700'" class="w-[42px] h-[42px] flex items-center justify-center rounded-xl border transition-colors outline-none"><q-icon name="grid_view" size="20px" /></button>
-                     <button @click="viewMode = 'list'" :class="viewMode === 'list' ? 'bg-[#E9EFFD] dark:bg-blue-900/40 text-[#3B6BE8] border-[#3B6BE8]' : 'bg-white border-slate-200 dark:bg-slate-800 dark:border-slate-700 text-slate-400 hover:bg-slate-50'" class="w-[42px] h-[42px] flex items-center justify-center rounded-xl border transition-colors outline-none"><q-icon name="view_list" size="20px" /></button>
+                     <button @click="viewMode = 'list'" :class="viewMode === 'list' ? 'bg-[#E9EFFD] dark:!bg-blue-900/40 text-[#3B6BE8] dark:!text-blue-400 border-[#3B6BE8] dark:!border-blue-400' : 'bg-white border-slate-200 dark:!bg-slate-800 dark:!border-slate-700 text-slate-400 dark:!text-slate-300 hover:bg-slate-50 dark:hover:!bg-slate-700'" class="w-[42px] h-[42px] flex items-center justify-center rounded-xl border transition-colors outline-none"><q-icon name="view_list" size="20px" /></button>
                   </div>
                </div>
             </div>
@@ -185,17 +203,17 @@ onMounted(async () => {
                 <div class="flex flex-wrap items-center gap-3 w-full xl:w-auto">
                    <button 
                      @click="activeCategory = 'all'"
-                     :class="activeCategory === 'all' ? 'bg-[#E9EFFD] dark:bg-blue-900/40 text-[#3B6BE8] border-transparent font-bold' : 'bg-white dark:bg-transparent border-slate-200 dark:border-slate-700 text-slate-800 dark:text-slate-300 hover:border-slate-300 font-medium'"
+                     :class="activeCategory === 'all' ? 'bg-[#E9EFFD] dark:!bg-blue-900/40 text-[#3B6BE8] dark:!text-blue-400 border-transparent font-bold' : 'bg-white dark:!bg-slate-800 border-slate-200 dark:!border-slate-700 text-slate-800 dark:!text-slate-200 hover:border-slate-300 dark:hover:!border-slate-600 font-medium'"
                      class="px-5 py-2.5 rounded-full border text-[13px] sm:text-[14px] flex items-center justify-center gap-2 transition-all outline-none">
-                     <q-icon name="check_circle_outline" size="18px" :class="activeCategory === 'all' ? 'text-[#3B6BE8]' : 'text-slate-400'"/> ทั้งหมด
+                     <q-icon name="check_circle_outline" size="18px" :class="activeCategory === 'all' ? 'text-[#3B6BE8] dark:!text-blue-400' : 'text-slate-400 dark:!text-slate-400'"/> {{ $t('discovery.allCategory') }}
                    </button>
                    
                    <button 
                      v-for="cat in categories" :key="cat.id"
                      @click="activeCategory = cat.id"
-                     :class="activeCategory === cat.id ? 'bg-[#E9EFFD] dark:bg-blue-900/40 text-[#3B6BE8] border-transparent font-bold' : 'bg-white dark:bg-transparent border-slate-200 dark:border-slate-700 text-slate-800 dark:text-slate-300 hover:border-slate-300 font-medium'"
+                     :class="activeCategory === cat.id ? 'bg-[#E9EFFD] dark:!bg-blue-900/40 text-[#3B6BE8] dark:!text-blue-400 border-transparent font-bold' : 'bg-white dark:!bg-slate-800 border-slate-200 dark:!border-slate-700 text-slate-800 dark:!text-slate-200 hover:border-slate-300 dark:hover:!border-slate-600 font-medium'"
-                     class="px-5 py-2.5 rounded-full border text-[13px] sm:text-[14px] flex items-center justify-center gap-2 transition-all outline-none bg-transparent">
+                     class="px-5 py-2.5 rounded-full border text-[13px] sm:text-[14px] flex items-center justify-center gap-2 transition-all outline-none">
-                     <q-icon :name="getCategoryIcon(cat.name)" size="18px" :class="activeCategory === cat.id ? 'text-[#3B6BE8]' : 'text-slate-600 dark:text-slate-400'"/>
+                     <q-icon :name="getCategoryIcon(cat.name)" size="18px" :class="activeCategory === cat.id ? 'text-[#3B6BE8] dark:!text-blue-400' : 'text-slate-600 dark:!text-slate-400'"/>
                      {{ getLocalizedText(cat.name) }}
                    </button>
                 </div>
@@ -208,10 +226,10 @@ onMounted(async () => {
                <q-spinner size="3rem" color="primary" />
             </div>
 
-            <div v-else-if="courses.length > 0">
+            <div v-else-if="filteredCourses.length > 0">
                <!-- GRID VIEW -->
                <div v-if="viewMode === 'grid'" class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
-                  <div v-for="course in courses" :key="course.id" class="flex flex-col rounded-[1.5rem] bg-white dark:bg-slate-900 border border-slate-100 dark:border-slate-800 overflow-hidden shadow-[0_2px_10px_rgb(0,0,0,0.03)] hover:shadow-[0_8px_30px_rgb(0,0,0,0.08)] transition-all duration-300 group cursor-pointer" @click="selectCourse(course.id)">
+                  <div v-for="course in filteredCourses" :key="course.id" class="flex flex-col rounded-[1.5rem] bg-white dark:!bg-slate-900 border border-slate-100 dark:!border-slate-800 overflow-hidden shadow-[0_2px_10px_rgb(0,0,0,0.03)] hover:shadow-[0_8px_30px_rgb(0,0,0,0.08)] transition-all duration-300 group cursor-pointer" @click="selectCourse(course.id)">
                      <!-- Thumbnail -->
                      <div class="relative w-full aspect-[16/10] bg-slate-100 dark:bg-slate-800 overflow-hidden">
                         <img :src="course.thumbnail_url" class="w-full h-full object-cover group-hover:scale-105 transition-transform duration-500" />
@@ -222,7 +240,7 @@ onMounted(async () => {
                      
                      <!-- Body -->
                      <div class="p-5 flex flex-col flex-1">
-                        <h3 class="font-bold text-slate-900 dark:text-white text-[15px] leading-snug line-clamp-2 mb-2">{{ getLocalizedText(course.title) }}</h3>
+                        <h3 class="font-bold text-slate-900 dark:text-[#f8fafc] text-[15px] leading-snug line-clamp-2 mb-2 group-hover:text-blue-600 dark:group-hover:text-blue-400 transition-colors">{{ getLocalizedText(course.title) }}</h3>
                         
 
                         
@@ -230,8 +248,7 @@ onMounted(async () => {
                             <div class="font-[900] text-[18px]" :class="course.is_free ? 'text-green-500' : 'text-[#2563EB] dark:text-blue-400'">
                                 {{ course.formatted_price }}
                             </div>
-                            <!-- Eye icon circle button -->
+                            <button class="w-[38px] h-[38px] rounded-full bg-slate-50 dark:!bg-slate-800 text-slate-400 dark:!text-slate-300 flex items-center justify-center hover:bg-blue-50 hover:text-blue-600 dark:hover:!bg-slate-700 dark:hover:!text-blue-400 border border-slate-100 dark:!border-slate-700 transition-colors shadow-sm outline-none">
-                            <button class="w-[38px] h-[38px] rounded-full bg-slate-50 dark:bg-slate-800 text-slate-400 dark:text-slate-500 flex items-center justify-center hover:bg-blue-50 hover:text-blue-600 dark:hover:bg-slate-700 border border-slate-100 dark:border-slate-700 transition-colors shadow-sm outline-none">
                                 <q-icon name="visibility" size="18px" />
                             </button>
                         </div>
@@ -241,7 +258,7 @@ onMounted(async () => {
 
                <!-- LIST VIEW -->
                <div v-else class="flex flex-col gap-5">
-                  <div v-for="course in courses" :key="course.id" class="flex flex-col sm:flex-row rounded-[1.5rem] bg-white dark:bg-slate-900 border border-slate-100 dark:border-slate-800 p-3 sm:p-4 gap-4 sm:gap-6 shadow-sm hover:shadow-[0_8px_30px_rgb(0,0,0,0.06)] transition-all duration-300 group cursor-pointer" @click="selectCourse(course.id)">
+                  <div v-for="course in filteredCourses" :key="course.id" class="flex flex-col sm:flex-row rounded-[1.5rem] bg-white dark:!bg-slate-900 border border-slate-100 dark:!border-slate-800 p-3 sm:p-4 gap-4 sm:gap-6 shadow-sm hover:shadow-[0_8px_30px_rgb(0,0,0,0.06)] transition-all duration-300 group cursor-pointer" @click="selectCourse(course.id)">
                      <div class="relative w-full sm:w-[260px] aspect-[16/10] sm:aspect-auto sm:h-[160px] rounded-[1rem] bg-slate-100 dark:bg-slate-800 overflow-hidden shrink-0">
                         <img :src="course.thumbnail_url" class="w-full h-full object-cover group-hover:scale-105 transition-transform duration-500" />
                         <div v-if="course.category_name" class="absolute top-3 left-3 bg-white/95 dark:bg-slate-900/95 backdrop-blur-md text-[#3B6BE8] dark:text-blue-400 font-bold text-[10px] px-3.5 py-1.5 rounded-full shadow-sm" style="border-radius: 9999px; padding: 4px 12px;">
@@ -250,15 +267,15 @@ onMounted(async () => {
                      </div>
                      <div class="flex flex-col flex-1 py-1">
                         <div class="flex-1">
-                            <h3 class="font-bold text-slate-900 dark:text-white text-[16px] md:text-[18px] leading-snug line-clamp-2 md:line-clamp-1 mb-2">{{ getLocalizedText(course.title) }}</h3>
+                            <h3 class="font-bold text-slate-900 dark:text-[#f8fafc] text-[16px] md:text-[18px] leading-snug line-clamp-2 md:line-clamp-1 mb-2 group-hover:text-blue-600 dark:group-hover:text-blue-400 transition-colors">{{ getLocalizedText(course.title) }}</h3>
 
                         </div>
                         <div class="mt-4 sm:mt-auto flex items-center justify-between">
                             <div class="font-[900] text-[20px]" :class="course.is_free ? 'text-green-500' : 'text-[#2563EB] dark:text-blue-400'">
                                 {{ course.formatted_price }}
                             </div>
-                            <button class="px-6 py-2 rounded-full bg-slate-50 text-slate-600 dark:bg-slate-800 dark:text-slate-300 font-bold text-[13px] flex items-center gap-2 hover:bg-blue-50 border border-slate-100 dark:border-slate-700 hover:text-blue-600 transition-colors">
+                            <button class="px-6 py-2 rounded-full bg-slate-50 text-slate-600 dark:!bg-slate-800 dark:!text-slate-300 font-bold text-[13px] flex items-center gap-2 hover:bg-blue-50 hover:text-blue-600 dark:hover:!bg-slate-700 dark:hover:!text-blue-400 border border-slate-100 dark:!border-slate-700 transition-colors">
-                                <q-icon name="visibility" size="16px" /> ดูรายละเอียด
+                                <q-icon name="visibility" size="16px" /> {{ $t('discovery.viewDetails') }}
                             </button>
                         </div>
                      </div>
@@ -272,9 +289,9 @@ onMounted(async () => {
             </div>
 
             <!-- Empty State -->
-            <div v-else class="flex flex-col items-center justify-center py-20 bg-white dark:bg-slate-900/40 rounded-3xl border border-dashed border-slate-200 dark:border-slate-800">
+            <div v-else class="flex flex-col items-center justify-center py-20 bg-white dark:!bg-slate-900/50 rounded-3xl border border-dashed border-slate-200 dark:!border-slate-800">
                <q-icon name="search_off" size="64px" class="text-slate-300 dark:text-slate-600 mb-4" />
-               <h3 class="text-xl font-bold text-slate-900 dark:text-white mb-2">{{ $t("discovery.emptyTitle") }}</h3>
+               <h3 class="text-xl font-bold text-slate-900 dark:!text-white mb-2">{{ $t("discovery.emptyTitle") }}</h3>
                <p class="text-slate-500 dark:text-slate-400 text-center max-w-md">{{ $t("discovery.emptyDesc") }}</p>
                <button class="mt-6 font-bold text-blue-600 hover:text-blue-700 transition-colors" @click="searchQuery = ''; activeCategory = 'all';">
                   {{ $t("discovery.showAll") }}

Frontend-Learner/pages/browse/index.vue

@@ -1,8 +1,8 @@
 <script setup lang="ts">
 /**
  * @file index.vue
- * @description Page displaying all available courses in a public catalog format.
+ * @description หน้าแสดงคอร์สเรียนทั้งหมดในรูปแบบแคตตาล็อกสาธารณะ
- * Matches the requested modern layout.
+ * ดีไซน์ปรับให้ทันสมัยเพื่อดึงดูดผู้ใช้งานใหม่
  */
 
 definePageMeta({
@@ -13,6 +13,7 @@ useHead({
   title: 'คอร์สทั้งหมด - E-Learning System'
 })
 
+const { t } = useI18n()
 const searchQuery = ref('')
 const { fetchCourses } = useCourse()
 const { fetchCategories, categories } = useCategory()
@@ -54,7 +55,7 @@ await useAsyncData('categories-list', () => fetchCategories())
 const { data: coursesResponse, pending: isLoading, error, refresh } = await useAsyncData(
   'browse-courses-list', 
   () => {
-    const params: any = {}
+    const params: any = { limit: 500 }
     if (selectedCategory.value !== 'all') {
       const category = categories.value.find(c => c.slug === selectedCategory.value)
       if (category) {
@@ -126,16 +127,16 @@ const viewMode = ref<'grid' | 'list'>('grid')
 <template>
   <div class="bg-[#F8F9FA] dark:bg-[#020617] min-h-screen pt-32 pb-20 px-4 md:px-8 transition-colors duration-300">
     <div class="max-w-[1240px] mx-auto">
-        <!-- Catalog View -->
+        <!-- มุมมองแคตตาล็อกแสดงคอร์ส (Catalog View) -->
         <div class="bg-white dark:bg-slate-900 rounded-[2rem] p-6 md:p-8 shadow-[0_2px_15px_rgb(0,0,0,0.02)] border border-slate-100 dark:border-slate-800 min-h-[500px] mb-12">
             
             <!-- ส่วนหัวและการค้นหา -->
             <div class="flex flex-col md:flex-row md:items-center justify-between gap-6 mb-8">
-               <h2 class="text-[1.35rem] font-bold text-slate-900 dark:text-white tracking-tight">คอร์สเรียนทั้งหมด</h2>
+               <h2 class="text-[1.35rem] font-bold text-slate-900 dark:text-white tracking-tight">{{ $t('discovery.title') }}</h2>
                <div class="flex flex-wrap sm:flex-nowrap items-center gap-3 w-full md:w-auto">
                   <div class="relative w-full sm:w-[260px] flex-1">
                      <q-icon name="search" size="18px" class="absolute left-4 top-1/2 -translate-y-1/2 text-slate-400 group-focus-within:text-[#3B6BE8]" />
-                     <input v-model="searchQuery" class="w-full bg-slate-100 dark:bg-slate-800 border-none rounded-xl py-2.5 pl-11 pr-4 text-sm font-medium text-slate-700 dark:text-slate-200 placeholder:text-slate-400 focus:ring-2 focus:ring-blue-500/20 outline-none transition-all shadow-sm" placeholder="ค้นหาคอร์ส..." />
+                     <input v-model="searchQuery" class="w-full bg-slate-100 dark:bg-slate-800 border-none rounded-xl py-2.5 pl-11 pr-4 text-sm font-medium text-slate-700 dark:text-slate-200 placeholder:text-slate-400 focus:ring-2 focus:ring-blue-500/20 outline-none transition-all shadow-sm" :placeholder="$t('discovery.searchPlaceholder')" />
                   </div>
                   <div class="flex items-center gap-2 shrink-0">
                      <button @click="viewMode = 'grid'" :class="viewMode === 'grid' ? 'bg-[#E9EFFD] dark:bg-blue-900/40 text-[#3B6BE8] border-[#3B6BE8]' : 'bg-white border-slate-200 dark:bg-slate-800 dark:border-slate-700 text-slate-400 hover:bg-slate-50'" class="w-[42px] h-[42px] flex items-center justify-center rounded-xl border transition-colors outline-none"><q-icon name="grid_view" size="20px" /></button>
@@ -144,14 +145,14 @@ const viewMode = ref<'grid' | 'list'>('grid')
                </div>
             </div>
 
-            <!-- Filters Category -->
+            <!-- ตัวกรองหมวดหมู่ (Filters Category) -->
             <div class="flex flex-col xl:flex-row xl:items-center justify-between gap-4 mb-10 w-full relative">
                 <div class="flex flex-wrap items-center gap-3 w-full xl:w-auto">
                    <button 
                      @click="selectCategory('all')"
                      :class="selectedCategory === 'all' ? 'bg-[#E9EFFD] dark:bg-blue-900/40 text-[#3B6BE8] border-transparent font-bold' : 'bg-white dark:bg-transparent border-slate-200 dark:border-slate-700 text-slate-800 dark:text-slate-300 hover:border-slate-300 font-medium'"
                      class="px-5 py-2.5 rounded-full border text-[13px] sm:text-[14px] flex items-center justify-center gap-2 transition-all outline-none">
-                     <q-icon name="check_circle_outline" size="18px" :class="selectedCategory === 'all' ? 'text-[#3B6BE8]' : 'text-slate-400'"/> ทั้งหมด
+                     <q-icon name="check_circle_outline" size="18px" :class="selectedCategory === 'all' ? 'text-[#3B6BE8]' : 'text-slate-400'"/> {{ $t('discovery.allCategory') }}
                    </button>
                    
                    <button 
@@ -165,16 +166,16 @@ const viewMode = ref<'grid' | 'list'>('grid')
                 </div>
             </div>
 
-            <!-- Loader -->
+            <!-- ตัวแสดงการโหลด (Loader) -->
             <div v-if="isLoading" class="flex justify-center py-24">
                <q-spinner size="3rem" color="primary" />
             </div>
 
             <div v-else-if="filteredCourses.length > 0">
-               <!-- GRID VIEW -->
+               <!-- มุมมองแบบกริด (GRID VIEW) -->
                <div v-if="viewMode === 'grid'" class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
                   <NuxtLink v-for="course in filteredCourses" :key="course.id" :to="`/course/${course.id}`" class="flex flex-col rounded-[1.5rem] bg-white dark:bg-slate-900 border border-slate-100 dark:border-slate-800 overflow-hidden shadow-[0_2px_10px_rgb(0,0,0,0.03)] hover:shadow-[0_8px_30px_rgb(0,0,0,0.08)] transition-all duration-300 group cursor-pointer">
-                     <!-- Thumbnail -->
+                     <!-- รูปหน้าปก (Thumbnail) -->
                      <div class="relative w-full aspect-[16/10] bg-slate-100 dark:bg-slate-800 overflow-hidden">
                         <img :src="course.thumbnail_url" class="w-full h-full object-cover group-hover:scale-105 transition-transform duration-500" />
                         <div v-if="course.category_name" class="absolute top-3 left-3 bg-white/95 dark:bg-slate-900/95 backdrop-blur-md text-[#3B6BE8] dark:text-blue-400 font-bold text-[10px] px-3.5 py-1 rounded-full shadow-sm" style="border-radius: 9999px; padding: 4px 12px;">
@@ -182,25 +183,25 @@ const viewMode = ref<'grid' | 'list'>('grid')
                         </div>
                      </div>
                      
-                     <!-- Body -->
+                     <!-- เนื้อหาคอร์ส (Body) -->
                      <div class="p-5 flex flex-col flex-1">
                         <h3 class="font-bold text-slate-900 dark:text-white text-[15px] leading-snug line-clamp-2 mb-2 group-hover:text-blue-600 transition-colors">{{ getLocalizedText(course.title) }}</h3>
                         
                         <div class="flex items-center gap-2 mb-4">
-                           <span class="text-[12px] text-slate-500 font-medium">โดย {{ course.instructor_name }}</span>
+                           <span class="text-[12px] text-slate-500 font-medium">{{ $t('discovery.byInstructor') }} {{ course.instructor_name }}</span>
                         </div>
 
                         <div class="flex items-center gap-1.5 mb-5">
                              <q-icon name="star" class="text-amber-400" size="16px" />
                              <span class="text-[13px] font-bold text-slate-800 dark:text-slate-200">{{ course.rating }}</span>
-                             <span class="text-[12px] text-slate-400">({{ course.reviews_count.toLocaleString() }} นักเรียน)</span>
+                             <span class="text-[12px] text-slate-400">({{ course.reviews_count.toLocaleString() }} {{ $t('discovery.students') }})</span>
                         </div>
                         
                         <div class="mt-auto flex items-center justify-between">
                             <div class="font-[900] text-[18px]" :class="course.is_free ? 'text-green-500' : 'text-[#2563EB] dark:text-blue-400'">
                                 {{ course.formatted_price }}
                             </div>
-                            <!-- Eye icon circle button -->
+                            <!-- ปุ่มกดรูปตาเพื่อดูรายละเอียด (Eye icon circle button) -->
                             <button class="w-[38px] h-[38px] rounded-full bg-slate-50 dark:bg-slate-800 text-slate-400 dark:text-slate-500 flex items-center justify-center hover:bg-blue-50 hover:text-blue-600 dark:hover:bg-slate-700 border border-slate-100 dark:border-slate-700 transition-colors shadow-sm outline-none">
                                 <q-icon name="visibility" size="18px" />
                             </button>
@@ -209,7 +210,7 @@ const viewMode = ref<'grid' | 'list'>('grid')
                   </NuxtLink>
                </div>
 
-               <!-- LIST VIEW -->
+               <!-- มุมมองแบบรายการ (LIST VIEW) -->
                <div v-else class="flex flex-col gap-5">
                   <NuxtLink v-for="course in filteredCourses" :key="course.id" :to="`/course/${course.id}`" class="flex flex-col sm:flex-row rounded-[1.5rem] bg-white dark:bg-slate-900 border border-slate-100 dark:border-slate-800 p-3 sm:p-4 gap-4 sm:gap-6 shadow-sm hover:shadow-[0_8px_30px_rgb(0,0,0,0.06)] transition-all duration-300 group cursor-pointer">
                      <div class="relative w-full sm:w-[260px] aspect-[16/10] sm:aspect-auto sm:h-[160px] rounded-[1rem] bg-slate-100 dark:bg-slate-800 overflow-hidden shrink-0">
@@ -222,12 +223,12 @@ const viewMode = ref<'grid' | 'list'>('grid')
                         <div class="flex-1">
                             <h3 class="font-bold text-slate-900 dark:text-white text-[16px] md:text-[18px] leading-snug line-clamp-2 md:line-clamp-1 mb-2 group-hover:text-blue-600 transition-colors">{{ getLocalizedText(course.title) }}</h3>
                             <div class="flex items-center gap-2 mb-3">
-                               <span class="text-[13px] text-slate-500 font-medium">โดย {{ course.instructor_name }}</span>
+                               <span class="text-[13px] text-slate-500 font-medium">{{ $t('discovery.byInstructor') }} {{ course.instructor_name }}</span>
                             </div>
                             <div class="flex items-center gap-1.5 mb-2">
                                  <q-icon name="star" class="text-amber-400" size="16px" />
                                  <span class="text-[13px] font-bold text-slate-800 dark:text-slate-200">{{ course.rating }}</span>
-                                 <span class="text-[12px] text-slate-400">({{ course.reviews_count.toLocaleString() }} นักเรียน)</span>
+                                 <span class="text-[12px] text-slate-400">({{ course.reviews_count.toLocaleString() }} {{ $t('discovery.students') }})</span>
                             </div>
                         </div>
                         <div class="mt-4 sm:mt-auto flex items-center justify-between">
@@ -235,7 +236,7 @@ const viewMode = ref<'grid' | 'list'>('grid')
                                 {{ course.formatted_price }}
                             </div>
                             <button class="px-6 py-2 rounded-full bg-slate-50 text-slate-600 dark:bg-slate-800 dark:text-slate-300 font-bold text-[13px] flex items-center gap-2 hover:bg-blue-50 border border-slate-100 dark:border-slate-700 hover:text-blue-600 transition-colors">
-                                <q-icon name="visibility" size="16px" /> ดูรายละเอียด
+                                <q-icon name="visibility" size="16px" /> {{ $t('discovery.viewDetails') }}
                             </button>
                         </div>
                      </div>
@@ -243,13 +244,13 @@ const viewMode = ref<'grid' | 'list'>('grid')
                </div>
             </div>
 
-            <!-- Empty State -->
+            <!-- กรณีไม่พบข้อมูลคอร์ส (Empty State) -->
             <div v-else class="flex flex-col items-center justify-center py-20 bg-white dark:bg-slate-900/40 rounded-3xl border border-dashed border-slate-200 dark:border-slate-800">
                <q-icon name="search_off" size="64px" class="text-slate-300 dark:text-slate-600 mb-4" />
-               <h3 class="text-xl font-bold text-slate-900 dark:text-white mb-2">{{ searchQuery ? 'ไม่พบคอร์สที่คุณค้นหา' : 'ไม่มีคอร์สในหมวดหมู่นี้' }}</h3>
+               <h3 class="text-xl font-bold text-slate-900 dark:text-white mb-2">{{ $t('discovery.emptyTitle') }}</h3>
-               <p class="text-slate-500 dark:text-slate-400 text-center max-w-md">ลองใช้คำค้นหาอื่น หรือเลือกหมวดหมู่อื่นเพื่อดูคอร์สที่เรามีให้บริการ</p>
+               <p class="text-slate-500 dark:text-slate-400 text-center max-w-md">{{ $t('discovery.emptyDesc') }}</p>
                <button class="mt-6 font-bold text-blue-600 hover:text-blue-700 transition-colors" @click="searchQuery = ''; selectedCategory = 'all';">
-                  แสดงคอร์สทั้งหมด
+                  {{ $t('discovery.showAll') }}
                </button>
             </div>
         </div>
@@ -258,7 +259,7 @@ const viewMode = ref<'grid' | 'list'>('grid')
 </template>
 
 <style scoped>
-/* Disable default scrollbar for filter container */
+/* ปิดการแสดงแถบเลื่อนบนคอนเทนเนอร์ของตัวกรอง (Disable default scrollbar for filter container) */
 .no-scrollbar::-webkit-scrollbar {
     display: none;
 }

Frontend-Learner/pages/classroom/learning.vue

@@ -22,7 +22,7 @@ const { user } = useAuth()
 const { fetchCourseLearningInfo, fetchLessonContent, saveVideoProgress, checkLessonAccess, fetchVideoProgress, fetchCourseAnnouncements, markLessonComplete, getLocalizedText } = useCourse()
 const $q = useQuasar()
 
-// State management
+// การจัดการสถานะ (State management)
 const sidebarOpen = ref(false)
 const courseId = computed(() => Number(route.query.course_id))
 
@@ -31,11 +31,11 @@ const courseId = computed(() => Number(route.query.course_id))
 // ==========================================
 // courseData: เก็บข้อมูลโครงสร้างคอร์ส (บทเรียนต่างๆ)
 const courseData = ref<any>(null)
-const announcements = ref<any[]>([]) // Announcements state
+const announcements = ref<any[]>([]) // สถานะของประกาศ (Announcements state)
-const showAnnouncementsModal = ref(false) // Modal state
+const showAnnouncementsModal = ref(false) // สถานะของป๊อปอัป (Modal state)
-const hasUnreadAnnouncements = ref(false) // Unread state tracking
+const hasUnreadAnnouncements = ref(false) // ติดตามสถานะที่ยังไม่ได้อ่าน (Unread state tracking)
 
-// Helper for persistent read status
+// ฟังก์ชันช่วยเหลือสำหรับเก็บสถานะการอ่านถาวร (Helper for persistent read status)
 const getAnnouncementStorageKey = () => {
     if (!user.value?.id || !courseId.value) return ''
     return `read_announcements:${user.value.id}:${courseId.value}`
@@ -61,17 +61,17 @@ const checkUnreadAnnouncements = () => {
     const lastReadDate = new Date(lastRead).getTime()
     const hasNew = announcements.value.some(a => {
         const annDate = new Date(a.created_at || Date.now()).getTime()
-        // Check if announcement is strictly newer than last read
+        // ตรวจสอบว่าประกาศใหม่กว่าที่อ่านครั้งล่าสุดหรือไม่ (Check if announcement is strictly newer than last read)
         return annDate > lastReadDate
     })
     
     hasUnreadAnnouncements.value = hasNew
 }
 
-// Handler for opening announcements
+// ฟังก์ชันจัดการเมื่อเปิดประกาศ (Handler for opening announcements)
 const handleOpenAnnouncements = () => {
     showAnnouncementsModal.value = true
-    hasUnreadAnnouncements.value = false // Clear unread badge on click
+    hasUnreadAnnouncements.value = false // ลบป้ายแจ้งเตือนเมื่อคลิก (Clear unread badge on click)
     
     const key = getAnnouncementStorageKey()
     if (key) {
@@ -98,7 +98,7 @@ const toggleSidebar = () => {
   sidebarOpen.value = !sidebarOpen.value
 }
 
-// Logic Quiz Attempt Management
+// การจัดการตรรกะจำนวนครั้งในการทำแบบทดสอบ (Logic Quiz Attempt Management)
 const quizStatus = computed(() => {
   if (!currentLesson.value || currentLesson.value.type !== 'QUIZ' || !currentLesson.value.quiz) return null
   
@@ -106,7 +106,7 @@ const quizStatus = computed(() => {
   const latestAttempt = quiz.latest_attempt
   const allowMultiple = quiz.allow_multiple_attempts
 
-  // If never attempted
+  // หากยังไม่เคยทดสอบ (If never attempted)
   if (!latestAttempt) {
     return {
       canStart: true,
@@ -116,7 +116,7 @@ const quizStatus = computed(() => {
     }
   }
 
-  // If multiple attempts allowed
+  // หากอนุญาตให้ทดสอบได้หลายครั้ง (If multiple attempts allowed)
   if (allowMultiple) {
     return {
       canStart: true,
@@ -128,8 +128,8 @@ const quizStatus = computed(() => {
     }
   }
 
-  // allowMultiple is false (Single attempt only)
+  // ไม่อนุญาตให้สอบได้หลายครั้ง (allowMultiple is false (Single attempt only))
-  // Lock the quiz regardless of pass/fail once attempted
+  // ล็อกแบบทดสอบหลังทำเสร็จไม่ว่าจะผ่านหรือไม่ผ่าน (Lock the quiz regardless of pass/fail once attempted)
   return {
     canStart: false,
     label: latestAttempt.is_passed ? t('quiz.passedStatus') : t('quiz.failedStatus'),
@@ -145,7 +145,7 @@ const handleStartQuiz = () => {
 
     const quiz = currentLesson.value.quiz
     
-    // If multiple attempts are disabled and it's the first time
+    // หากทำได้ครั้งเดียวและนี่เป็นครั้งแรก (If multiple attempts are disabled and it's the first time)
     if (!quiz.allow_multiple_attempts && !quiz.latest_attempt) {
         $q.dialog({
             title: `<div class="text-slate-900 dark:text-white font-black text-xl">${t('quiz.warningTitle')}</div>`,
@@ -193,18 +193,18 @@ const resetAndNavigate = (path: string) => {
         }
     }
     
-    // 2. Clear all localStorage
+    // 2. ลบข้อมูลใน localStorage ทั้งหมด (Clear all localStorage)
     localStorage.clear()
     
-    // 3. Restore ONLY whitelisted keys
+    // 3. คืนค่าเฉพาะคีย์ที่อนุญาต (Restore ONLY whitelisted keys)
     Object.keys(whitelist).forEach(key => {
         localStorage.setItem(key, whitelist[key])
     })
     
-    // 4. Force hard reload to the new path
+    // 4. บังคับโหลดหน้าเว็บใหม่ไปยังเส้นทางใหม่ (Force hard reload to the new path)
     window.location.href = path
   } else {
-    // SSR Fallback
+    // การทำงานสำรองสำหรับ SSR (SSR Fallback)
     router.push(path)
   }
 }
@@ -213,13 +213,13 @@ const resetAndNavigate = (path: string) => {
 const handleLessonSelect = (lessonId: number) => {
   if (currentLesson.value?.id === lessonId) return
   
-  // 1. Update URL query params
+  // 1. อัปเดตพารามิเตอร์ใน URL (Update URL query params)
   router.push({ query: { ...route.query, lesson_id: lessonId.toString() } })
   
-  // 2. Load content without refresh
+  // 2. โหลดเนื้อหาโดยไม่ต้องรีเฟรชหน้าเว็บ (Load content without refresh)
   loadLesson(lessonId)
   
-  // Close sidebar on mobile
+  // ปิดแถบด้านข้างบนมือถือ (Close sidebar on mobile)
   if (sidebarOpen.value) {
     sidebarOpen.value = false
   }
@@ -245,7 +245,7 @@ const loadCourseData = async () => {
     if (res.success) {
       courseData.value = res.data
       
-      // Auto-load logic: Check URL first, fallback to first available lesson
+      // ตรรกะการโหลดอัตโนมัติ: เช็ค URL ก่อน หากไม่มีให้โหลดบทเรียนแรก (Auto-load logic: Check URL first, fallback to first available lesson)
       const urlLessonId = route.query.lesson_id ? Number(route.query.lesson_id) : null
       
       if (urlLessonId) {
@@ -258,7 +258,7 @@ const loadCourseData = async () => {
           }
       }
 
-      // Fetch Course Announcements
+      // ดึงข้อมูลประกาศของคอร์สเรียน (Fetch Course Announcements)
       const annRes = await fetchCourseAnnouncements(courseId.value)
       if (annRes.success) {
           announcements.value = annRes.data || []
@@ -275,7 +275,7 @@ const loadCourseData = async () => {
 const loadLesson = async (lessonId: number) => {
   if (currentLesson.value?.id === lessonId) return
   
-  // Clear previous video state & unload component to force reset
+  // ล้างสถานะวิดีโอเดิมเพื่อบังคับตั้งค่าใหม่ (Clear previous video state & unload component to force reset)
   isPlaying.value = false
   videoProgress.value = 0
   currentTime.value = 0
@@ -285,16 +285,16 @@ const loadLesson = async (lessonId: number) => {
   lastSavedTimestamp.value = 0
   lastLocalSaveTimestamp.value = 0
   currentDuration.value = 0
-  currentLesson.value = null // This will unmount VideoPlayer and hide content
+  currentLesson.value = null // ตัวนี้จะทำการซ่อนวิดีโอและซ่อนเนื้อหา (This will unmount VideoPlayer and hide content)
   
   isLessonLoading.value = true
   try {
-    // Optional: Check access first
+    // ป้องกันไว้ก่อน: ตรวจสอบสิทธิ์การเข้าถึง (Optional: Check access first)
     const accessRes = await checkLessonAccess(courseId.value, lessonId)
     if (accessRes.success && !accessRes.data.is_accessible) {
         let msg = t('classroom.notAvailable')
         
-        // Handle specific lock reasons
+        // จัดการเหตุผลล็อกเฉพาะจุด (Handle specific lock reasons)
         if (accessRes.data.lock_reason) {
             msg = accessRes.data.lock_reason
         } else if (accessRes.data.required_quiz_pass && !accessRes.data.required_quiz_pass.is_passed) {
@@ -314,32 +314,32 @@ const loadLesson = async (lessonId: number) => {
         return
     }
 
-    // 1. Fetch content
+    // 1. ดึงข้อมูลเนื้อหา (Fetch content)
     const res = await fetchLessonContent(courseId.value, lessonId)
     if (res.success) {
       currentLesson.value = res.data
       
-      // Initialize progress object if missing (Critical for New Users)
+      // กำหนดค่าออบเจ็กต์ความคืบหน้าหากไม่มี (สำคัญสำหรับผู้ใช้ใหม่) (Initialize progress object if missing)
       if (!currentLesson.value.progress) {
           currentLesson.value.progress = {}
       }
       
-      // Update Lesson Completion UI status safely
+      // อัปเดตสถานะสำเร็จของบทเรียนบน UI อย่างปลอดภัย (Update Lesson Completion UI status safely)
       if (currentLesson.value?.progress?.is_completed && courseData.value) {
           for (const chapter of courseData.value.chapters) {
               const lesson = chapter.lessons.find((l: any) => l.id === lessonId)
               if (lesson) {
                   if (!lesson.progress) lesson.progress = {}
                   lesson.progress.is_completed = true
-                  lesson.is_completed = true // Standardize completion property
+                  lesson.is_completed = true // ตั้งค่าสถานะสำเร็จให้เป็นมาตรฐาน (Standardize completion property)
                   break
               }
           }
       }
 
-      // 2. Fetch Initial Progress (Resume Playback)
+      // 2. ดึงความคืบหน้าเริ่มต้นเพื่อเล่นต่อ (Fetch Initial Progress (Resume Playback))
       if (currentLesson.value.type === 'VIDEO') {
-           // If already completed, clear local resume point to allow fresh re-watch
+           // หากเรียนจบแล้ว ให้ล้างจุดที่ดูล่าสุดเพื่อดูใหม่ได้ (If already completed, clear local resume point to allow fresh re-watch)
            const isCompleted = currentLesson.value.progress?.is_completed || false
            
            if (isCompleted) {
@@ -351,7 +351,7 @@ const loadLesson = async (lessonId: number) => {
                maxWatchedTime.value = 0
                currentTime.value = 0
            } else {
-               // Not completed? Resume from where we left off
+               // ถ้ายังเรียนไม่จบ? กลับไปเล่นจากจุดเดิม (Not completed? Resume from where we left off)
                const progressRes = await fetchVideoProgress(lessonId)
                let serverProgress = 0
                if (progressRes.success && progressRes.data?.video_progress_seconds) {
@@ -379,24 +379,24 @@ const loadLesson = async (lessonId: number) => {
   }
 }
 
-// Video Player Ref (Component)
+// ข้อมูลอ้างอิงวิดีโอ (Video Player Ref (Component))
 const videoPlayerComp = ref(null)
 
-// Video & Progress State
+// สถานะความก้าวหน้าและวิดีโอ (Video & Progress State)
 const initialSeekTime = ref(0)
-const maxWatchedTime = ref(0) // Anti-rewind monotonic tracking
+const maxWatchedTime = ref(0) // การติดตามแบบไม่ย้อนกลับ (Anti-rewind monotonic tracking)
 const lastSavedTime = ref(-1)
-const lastSavedTimestamp = ref(0) // Server throttle timestamp
+const lastSavedTimestamp = ref(0) // เวลาบันทึกในเซิร์ฟเวอร์ (Server throttle timestamp)
-const lastLocalSaveTimestamp = ref(0) // Local throttle timestamp
+const lastLocalSaveTimestamp = ref(0) // เวลาบันทึกในเครื่อง (Local throttle timestamp)
-const currentDuration = ref(0) // Track duration for save logic
+const currentDuration = ref(0) // ติดตามเวลาของวิดีโอ (Track duration for save logic)
 
-// Helper: Get Local Storage Key
+// ฟังก์ชันช่วยเหลือ: ชื่อคีย์สำหรับ Local Storage (Helper: Get Local Storage Key)
 const getLocalProgressKey = (lessonId: number) => {
     if (!user.value?.id) return null
     return `progress:${user.value.id}:${lessonId}`
 }
 
-// Helper: Get Local Progress
+// ฟังก์ชันช่วยเหลือ: ดึงความคืบหน้าจากเครื่อง (Helper: Get Local Progress)
 const getLocalProgress = (lessonId: number): number => {
     try {
         const key = getLocalProgressKey(lessonId)
@@ -408,7 +408,7 @@ const getLocalProgress = (lessonId: number): number => {
     }
 }
 
-// Helper: Save to Local Storage
+// ฟังก์ชันช่วยเหลือ: บันทึกลงเครื่อง (Helper: Save to Local Storage)
 const saveLocalProgress = (lessonId: number, time: number) => {
     try {
         const key = getLocalProgressKey(lessonId)
@@ -416,31 +416,31 @@ const saveLocalProgress = (lessonId: number, time: number) => {
            localStorage.setItem(key, time.toString())
         }
     } catch (e) {
-        // Ignore storage errors
+        // ข้ามกรณีเกิดข้อผิดพลาดในการบันทึก (Ignore storage errors)
     }
 }
 
-// Handler: Video Time Update (from Component)
+// ฟังก์ชันจัดการเวลาของวิดีโอ (จาก Component) (Handler: Video Time Update (from Component))
 const handleVideoTimeUpdate = (cTime: number, dur: number) => {
   currentDuration.value = dur || 0
   
-  // Update Monotonic Progress
+  // อัปเดตความคืบหน้าแบบทางเดียว (Update Monotonic Progress)
   if (cTime > maxWatchedTime.value) {
       maxWatchedTime.value = cTime
   }
   
-  // Logic: Periodic Save 
+  // ตรรกะ: บันทึกเป็นระยะ (Logic: Periodic Save) 
   if (currentLesson.value?.id) {
       const now = Date.now()
       
-      // 1. Local Save Throttle (5 seconds)
+      // 1. การหน่วงเวลาบันทึกในเครื่อง (5 วินาที) (Local Save Throttle (5 seconds))
       if (now - lastLocalSaveTimestamp.value > 5000) {
           saveLocalProgress(currentLesson.value.id, maxWatchedTime.value)
           lastLocalSaveTimestamp.value = now
       }
       
-      // 2. Server Save Throttle (handled inside performSaveProgress)
+      // 2. การหน่วงเวลาบันทึกบนเซิร์ฟเวอร์ (จัดการใน performSaveProgress)
-      // Note: We don't check isPlaying here because if time is updating, it IS playing.
+      // หมายเหตุ: เราไม่เช็ค isPlaying ตรงนี้เพราะถ้าเวลาเดินแปลว่าเล่นอยู่ (Note: We don't check isPlaying here because if time is updating, it IS playing.)
       performSaveProgress(false, false)
   }
 }
@@ -451,49 +451,49 @@ const onVideoMetadataLoaded = (duration: number) => {
     }
 }
 
-const isCompleting = ref(false) // Flag to prevent race conditions during completion
+const isCompleting = ref(false) // ตัวแปรกันการแย่งกันทำงานตอนเรียนจบ (Flag to prevent race conditions during completion)
 
 // -----------------------------------------------------
-// ROBUST PROGRESS SAVING SYSTEM (Hybrid: Local + Server)
+// ระบบบันทึกความคืบหน้าที่แข็งแกร่ง (ไฮบริด: ในเครื่อง + เซิร์ฟเวอร์) (ROBUST PROGRESS SAVING SYSTEM (Hybrid: Local + Server))
 // -----------------------------------------------------
 
-// Main Server Save Function
+// ฟังก์ชันหลักสำหรับบันทึกลงเซิร์ฟเวอร์ (Main Server Save Function)
 const performSaveProgress = async (force: boolean = false, keepalive: boolean = false) => {
     const lesson = currentLesson.value
     if (!lesson || lesson.type !== 'VIDEO') return
     
-    // Ensure progress object exists
+    // ทำให้แน่ใจว่ามีออบเจ็กต์ความคืบหน้าอยู่ (Ensure progress object exists)
     if (!lesson.progress) lesson.progress = {}
 
-    // 1. Completed Guard: Stop everything if already completed
+    // 1. ป้องกันเมื่อดูจบแล้ว: ไม่ต้องบันทึกอีกถ้าดูจบไปแล้ว (Completed Guard: Stop everything if already completed)
     if (lesson.progress.is_completed) return
 
-    // 2. Race Condition Guard: Stop if currently completing
+    // 2. ป้องกันการเรียกซ้ำ: ไม่ทำงานถ้ากำลังบันทึกเวลาจบอยู่ (Race Condition Guard: Stop if currently completing)
     if (isCompleting.value) return
 
     const now = Date.now()
-    const maxSec = Math.floor(maxWatchedTime.value) // Use max watched time
+    const maxSec = Math.floor(maxWatchedTime.value) // ใช้เวลาที่ดูไปมากที่สุด (Use max watched time)
     const durationSec = Math.floor(currentDuration.value || 0)
 
-    // 3. Monotonic Check: Allow saving 0 if it's the very first save (lastSavedTime is -1)
+    // 3. ตรวจสอบการเดินหน้า: ยอมให้บันทึก 0 ได้ถ้าเป็นการบันทึกครั้งแรก (lastSavedTime is -1) (Monotonic Check: Allow saving 0 if it's the very first save)
     if (!force) {
         if (lastSavedTime.value === -1) {
-            // First time save: allow 0 or more
+            // บันทึกครั้งแรก: ยอมรับ 0 หรือมากกว่า (First time save: allow 0 or more)
             if (maxSec < 0) return 
         } else if (maxSec <= lastSavedTime.value) {
-            // Subsequent saves: must be greater than last saved
+            // การบันทึกครั้งถัดไป: ต้องมากกว่าครั้งล่าสุด (Subsequent saves: must be greater than last saved)
             return
         }
     }
     
-    // 4. Throttle Check: Server Throttle (15 seconds)
+    // 4. ตรวจสอบการหน่วงเวลา: เซิร์ฟเวอร์ (15 วินาที) (Throttle Check: Server Throttle (15 seconds))
     if (!force && (now - lastSavedTimestamp.value < 15000)) return
 
-    // Prepare for Save
+    // เตรียมบันทึก (Prepare for Save)
     lastSavedTime.value = maxSec 
     lastSavedTimestamp.value = now
 
-    // Check if this save might complete the lesson (e.g. 100% or forced end)
+    // เช็คว่าการบันทึกนี้จะทำให้จบบทเรียนหรือไม่ (เช่น 100% หรือบังคับจบ) (Check if this save might complete the lesson)
     const isFinishing = force || (durationSec > 0 && maxSec >= durationSec)
     
     if (isFinishing) {
@@ -503,8 +503,8 @@ const performSaveProgress = async (force: boolean = false, keepalive: boolean =
     try {
         const res = await saveVideoProgress(lesson.id, maxSec, durationSec, keepalive)
         
-        // Handle Completion (Frontend-only strategy: 95% threshold)
+        // จัดการเมื่อดูจบ (กลยุทธ์เฉพาะฝั่งหน้าเว็บ: ให้ผ่านที่ 95%) (Handle Completion (Frontend-only strategy: 95% threshold))
-        // This ensures the checkmark appears at 95% to match backend.
+        // เพื่อให้เครื่องหมายถูกขึ้นที่ 95% ตรงกับหลังบ้าน (This ensures the checkmark appears at 95% to match backend.)
         const progressPercentage = durationSec > 0 ? (maxSec / durationSec) : 0
         const isCompletedNow = res.success && (res.data?.is_completed || progressPercentage >= 0.95)
 
@@ -513,7 +513,7 @@ const performSaveProgress = async (force: boolean = false, keepalive: boolean =
              markLessonAsCompletedLocally(lesson.id)
              if (lesson.progress) lesson.progress.is_completed = true
              
-             // If newly completed, reload course data to unlock next lesson in sidebar
+             // หากเพิ่งเรียนจบใหม่ ให้โหลดเนื้อหาใหม่เพื่อปลดล็อกบทถัดไป (If newly completed, reload course data to unlock next lesson in sidebar)
              if (!wasAlreadyCompleted) {
                  await loadCourseData()
              }
@@ -527,13 +527,13 @@ const performSaveProgress = async (force: boolean = false, keepalive: boolean =
     }
 }
 
-// Helper to update Sidebar UI
+// ฟังก์ชันช่วยเหลือสำหรับอัปเดตแถบด้านข้าง (Helper to update Sidebar UI)
 const markLessonAsCompletedLocally = (lessonId: number) => {
     if (courseData.value) {
         for (const chapter of courseData.value.chapters) {
             const lesson = chapter.lessons.find((l: any) => l.id === lessonId)
             if (lesson) {
-                // Compatible with API structure
+                // สอดคล้องกับโครงสร้าง API (Compatible with API structure)
                 lesson.is_completed = true
                 if (!lesson.progress) lesson.progress = {}
                 lesson.progress.is_completed = true
@@ -547,11 +547,11 @@ const videoSrc = computed(() => {
   if (!currentLesson.value) return ''
   let url = ''
   
-  // Use explicit video_url from API first
+  // ใช่ video_url โดยตรงจาก API ก่อน (Use explicit video_url from API first)
   if (currentLesson.value.video_url) {
     url = currentLesson.value.video_url
   } else {
-    // Fallback (deprecated logic)
+    // สำรอง (ตรรกะแบบเก่า)
     const content = getLocalizedText(currentLesson.value.content)
     if (content && (content.startsWith('http') || content.startsWith('/')) && !content.includes(' ')) {
       url = content
@@ -560,7 +560,7 @@ const videoSrc = computed(() => {
 
   if (!url) return ''
 
-  // Support Resume for YouTube
+  // รองรับการเล่นต่อสำหรับ YouTube (Support Resume for YouTube)
   const isYoutube = url.toLowerCase().includes('youtube.com') || url.toLowerCase().includes('youtu.be')
   if (isYoutube && initialSeekTime.value > 0) {
       const separator = url.includes('?') ? '&' : '?'
@@ -575,7 +575,7 @@ const onVideoEnded = async () => {
     const lesson = currentLesson.value
     if (!lesson) return
 
-    // Clear local storage on end since it's completed
+    // ล้าง localStorage เนื่องจากดจบแล้ว (Clear local storage on end since it's completed)
     const key = getLocalProgressKey(lesson.id)
     if (key && typeof window !== 'undefined') {
         localStorage.removeItem(key)
@@ -598,7 +598,7 @@ onMounted(() => {
 })
 
 onBeforeUnmount(() => {
-  // Clear state when leaving the page to ensure fresh start on return
+  // ล้างสถานะเมื่อออกจากหน้าเพื่อให้หน้าเหมือนใหม่ตอนกลับมา (Clear state when leaving the page to ensure fresh start on return)
   courseData.value = null
   currentLesson.value = null
 })
@@ -665,7 +665,7 @@ onBeforeUnmount(() => {
       </q-toolbar>
     </q-header>
 
-    <!-- Sidebar (Curriculum) - Positioned Right via component prop -->
+    <!-- แถบด้านข้าง (บทเรียน) - วางชิดขวาผ่านพร็อพพ์ -->
     <CurriculumSidebar
       v-model="sidebarOpen"
       :courseData="courseData"
@@ -676,14 +676,14 @@ onBeforeUnmount(() => {
       @open-announcements="handleOpenAnnouncements"
     />
 
-    <!-- Main Content -->
+    <!-- พื้นที่เนื้อหาหลัก (Main Content) -->
     <q-page-container class="bg-white dark:bg-slate-900">
       <q-page class="flex flex-col h-full bg-slate-50 dark:bg-[#0B0F1A]">
-         <!-- Video Player & Content Area -->
+         <!-- กรอบวิดีโอและพื้นที่เนื้อหา (Video Player & Content Area) -->
          <div class="w-full h-full p-4 md:p-6 flex-grow overflow-y-auto">
-            <!-- 1. LOADING STATE (Comprehensive Skeleton) -->
+            <!-- 1. สถานะกำลังโหลด (โครงสร้างเสมือน (Skeleton) สมบูรณ์แบบ) (LOADING STATE (Comprehensive Skeleton)) -->
             <div v-if="isLessonLoading" class="animate-fade-in">
-                <!-- Video Skeleton -->
+                <!-- โครงภาพวิดีโอ (Video Skeleton) -->
                 <div class="aspect-video bg-slate-200 dark:bg-slate-800 rounded-3xl animate-pulse flex items-center justify-center mb-10 overflow-hidden relative shadow-xl focus:outline-none">
                     <img 
                         v-if="courseData?.course?.thumbnail_url"
@@ -697,7 +697,7 @@ onBeforeUnmount(() => {
                     </div>
                 </div>
                 
-                <!-- Info Skeleton -->
+                <!-- โครงข้อมูล (Info Skeleton) -->
                 <div class="bg-white dark:bg-slate-800/50 p-8 rounded-3xl border border-slate-100 dark:border-white/5 shadow-sm">
                     <div class="h-10 bg-slate-200 dark:bg-slate-800 rounded-xl w-3/4 mb-4 animate-pulse"></div>
                     <div class="h-4 bg-slate-100 dark:bg-slate-800 rounded-lg w-full mb-2 animate-pulse"></div>
@@ -705,9 +705,9 @@ onBeforeUnmount(() => {
                 </div>
             </div>
             
-            <!-- 2. READY STATE (Real Lesson Content) -->
+            <!-- 2. สถานะพร้อมใช้งาน (ข้อมูลบทเรียนจริง) (READY STATE (Real Lesson Content)) -->
             <div v-else-if="currentLesson" class="animate-fade-in">
-                <!-- Video Player -->
+                <!-- ส่วนการเล่นวิดีโอ (Video Player) -->
                 <VideoPlayer
                    v-if="videoSrc"
                    ref="videoPlayerComp"
@@ -719,7 +719,7 @@ onBeforeUnmount(() => {
                    @loadedmetadata="(d: number) => onVideoMetadataLoaded(d)"
                 />
             
-              <!-- Lesson Info -->
+              <!-- ข้อมูลบทเรียน (Lesson Info) -->
               <div class="bg-[var(--bg-surface)] p-6 md:p-8 rounded-3xl shadow-sm border border-[var(--border-color)]">
                 <!-- ใช้สีจากตัวแปรกลาง: จะแยกโหมดให้อัตโนมัติ (สว่าง=ดำ / มืด=ขาว) -->
                 <div class="flex items-start justify-between gap-4 mb-4">
@@ -728,7 +728,7 @@ onBeforeUnmount(() => {
                 
                 <p class="text-slate-600 dark:text-slate-400 text-base md:text-lg leading-relaxed mb-6" v-if="currentLesson.description">{{ getLocalizedText(currentLesson.description) }}</p>
                 
-                <!-- Lesson Content Area (Text/HTML) -->
+                <!-- ช่องบทเรียน (Text/HTML) (Lesson Content Area) -->
                 <div v-if="currentLesson.type === 'QUIZ'" class="p-8 bg-gradient-to-br from-blue-50/50 to-indigo-50/50 dark:from-slate-800/50 dark:to-slate-900/50 rounded-2xl border border-blue-100 dark:border-white/5 text-center">
                     <div class="bg-white dark:bg-slate-800 w-20 h-20 rounded-full flex items-center justify-center mx-auto mb-4 shadow-sm text-blue-500 dark:text-blue-400 border dark:border-white/10">
                         <q-icon name="quiz" size="40px" />
@@ -783,7 +783,7 @@ onBeforeUnmount(() => {
                     <div v-html="getLocalizedText(currentLesson.content)" class="leading-relaxed text-slate-800 dark:text-slate-200"></div>
                 </div>
 
-                <!-- Attachments Section -->
+                <!-- ส่วนเอกสารแนบ (Attachments Section) -->
                 <div v-if="currentLesson.attachments && currentLesson.attachments.length > 0" class="mt-8 pt-6 border-t border-gray-100 dark:border-white/5">
                     <h3 class="text-lg font-bold mb-4 text-slate-900 dark:text-white flex items-center gap-2">
                         <div class="w-8 h-8 rounded-lg bg-orange-100 dark:bg-orange-900/30 text-orange-600 flex items-center justify-center">

Frontend-Learner/pages/classroom/quiz.vue

@@ -1,9 +1,9 @@
 <script setup lang="ts">
 /**
  * @file quiz.vue
- * @description Quiz Interface.
+ * @description หน้าสำหรับทำแบบทดสอบ (Quiz Interface)
- * Manages the entire quiz lifecycle: Start -> Taking -> Results -> Review.
+ * จัดการวงจรชีวิตของการทำแบบทดสอบทั้งหมด: เริ่มต้น -> ทำข้อสอบ -> ผลลัพธ์ -> ทบทวน
- * Features a timer, question navigation, and detailed result analysis.
+ * มีฟีเจอร์จับเวลา การนำทางระหว่างคำถาม และการวิเคราะห์ผลลัพธ์อย่างละเอียด
  */
 
 definePageMeta({
@@ -17,7 +17,7 @@ const router = useRouter()
 const $q = useQuasar()
 const { fetchCourseLearningInfo, fetchLessonContent, submitQuiz: apiSubmitQuiz, markLessonComplete } = useCourse()
 
-// State Management
+// การจัดการสถานะ (State Management)
 const currentScreen = ref<'start' | 'taking' | 'result' | 'review'>('start')
 const timeLeft = ref(0) 
 let timerInterval: ReturnType<typeof setInterval> | null = null
@@ -30,20 +30,24 @@ const quizData = ref<any>(null)
 const isLoading = ref(true)
 const isSubmitting = ref(false)
 
-// Quiz Taking State
+// สถานะขณะทำแบบทดสอบ (Quiz Taking State)
 const currentQuestionIndex = ref(0)
-const userAnswers = ref<Record<number, number>>({}) // questionId -> choiceId
+const userAnswers = ref<Record<number, number>>({}) // ID คำถาม -> ID คำตอบ (questionId -> choiceId)
-const visitedQuestions = ref<Set<number>>(new Set()) // Track visited indices
+const visitedQuestions = ref<Set<number>>(new Set()) // ติดตามข้อที่เคยเปิดดูแล้ว (Track visited indices)
 const quizResult = ref<any>(null)
 
-// Tracking visited questions
+const questionPageSize = 10
+const questionPage = ref(0)
+
+// ติดตามคำถามที่เปิดดูแล้ว (Tracking visited questions)
 watch(currentQuestionIndex, (newVal) => {
     visitedQuestions.value.add(newVal)
+    questionPage.value = Math.floor(newVal / questionPageSize)
 }, { immediate: true })
 
-// Helper: Get Status Color Class
+// ฟังก์ชันช่วยเหลือ: ดึงคลาสสีสำหรับสถานะคำถาม (Helper: Get Status Color Class)
 const getQuestionStatusClass = (index: number, questionId: number) => {
-    // 1. Current = Blue
+    // 1. ข้อปัจจุบัน = สีฟ้า (Current = Blue)
     if (index === currentQuestionIndex.value) {
         return 'bg-blue-500 text-white border-blue-600 ring-2 ring-blue-200 dark:ring-blue-900'
     }
@@ -51,32 +55,29 @@ const getQuestionStatusClass = (index: number, questionId: number) => {
     const hasAnswer = userAnswers.value[questionId] !== undefined
     const isVisited = visitedQuestions.value.has(index)
 
-    // 2. Completed = Green
+    // 2. ตอบแล้ว = สีเขียว (Completed = Green)
     if (hasAnswer) {
         return 'bg-emerald-500 text-white border-emerald-600'
     }
 
-    // 3. Skipped = Orange (Visited but no answer)
+    // 3. ข้าม = สีส้ม (เปิดดูแล้วแต่ยังไม่ตอบ) (Skipped = Orange (Visited but no answer))
-    // Note: If we are strictly following "Skipped" definition:
+    // หมายเหตุ: ตามคำนิยามของการข้าม หากคลิกแล้วหน้าเว็บไม่บันทึกข้อมูลจะถือว่าเป็นการข้าม
-    // "user pressed Skip or moved forward on a skippable question without saving an answer"
+    // ในขั้นตอนนี้การดูเฉยๆ แล้วผ่านถือเป็นการข้ามเช่นกัน
-    // In this linear flow, merely visiting and leaving empty counts as skipped.
     if (isVisited && !hasAnswer) {
         return 'bg-orange-500 text-white border-orange-600'
     }
 
-    // 4. Not Started = Grey
+    // 4. ยังไม่เริ่ม = สีเทา (Not Started = Grey)
     return 'bg-slate-200 text-slate-400 border-slate-300 dark:bg-white/5 dark:border-white/5 dark:text-slate-600 hover:bg-slate-300 dark:hover:bg-white/10'
 }
 
 const jumpToQuestion = (targetIndex: number) => {
     if (targetIndex === currentQuestionIndex.value) return
     
-    // Validation before leaving current (same logic as Next)
+    // ตรวจสอบก่อนออกจากข้อปัจจุบัน (Validation before leaving current)
     if (targetIndex > currentQuestionIndex.value) {
-         // If jumping forward, we must validate the CURRENT question requirements
+         // หากข้ามไปข้างหน้า จะต้องตรวจสอบว่าข้อปัจจุบันทำไปถึงไหนแล้ว 
-         // unless we treat grid jumps as free navigation? 
+         // ควรบังคับให้คลิกคำตอบก่อนจึงข้ามได้ (เงื่อนไขสำหรับคำถามที่ไม่ให้ข้าม)
-         // Req: "user cannot go Next until the question is answered and saved" (if not skippable).
-         // So we must check restriction on the current spot before leaving.
          const isAnswered = userAnswers.value[currentQuestion.value.id] !== undefined
          const isSkippable = quizData.value?.is_skippable
          
@@ -91,12 +92,35 @@ const jumpToQuestion = (targetIndex: number) => {
          }
     }
     
-    // If jumping backward? Usually allowed freely.
+    // อนุญาตให้ย้อนกลับได้อย่างอิสระ (If jumping backward? Usually allowed freely.)
     
     currentQuestionIndex.value = targetIndex
 }
 
-// Computed
+const totalQuestionPages = computed(() => Math.ceil(totalQuestions.value / questionPageSize))
+
+const visibleQuestions = computed(() => {
+    if (!quizData.value?.questions) return []
+    const start = questionPage.value * questionPageSize
+    return quizData.value.questions.slice(start, start + questionPageSize).map((q: any, i: number) => ({
+        ...q,
+        originalIndex: start + i
+    }))
+})
+
+const nextQuestionPage = () => {
+    if (questionPage.value < totalQuestionPages.value - 1) {
+        questionPage.value++
+    }
+}
+
+const prevQuestionPage = () => {
+    if (questionPage.value > 0) {
+        questionPage.value--
+    }
+}
+
+// ตัวแปรแบบ Computed (Computed Properties)
 const currentQuestion = computed(() => {
     if (!quizData.value || !quizData.value.questions) return null
     return quizData.value.questions[currentQuestionIndex.value]
@@ -116,7 +140,7 @@ const timerDisplay = computed(() => {
   return `${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`
 })
 
-// Helper for localization
+// ฟังก์ชันช่วยเหลือสำหรับการแปลภาษา (Helper for localization)
 const getLocalizedText = (text: any) => {
   if (!text) return ''
   if (typeof text === 'string') return text
@@ -126,7 +150,7 @@ const getLocalizedText = (text: any) => {
 
 const lessonProgress = ref<any>(null)
 
-// Data Fetching
+// โหลดข้อมูล (Data Fetching)
 const loadData = async () => {
     isLoading.value = true
     try {
@@ -138,9 +162,9 @@ const loadData = async () => {
         if (courseId && lessonId) {
             const lessonRes = await fetchLessonContent(courseId, lessonId)
             if (lessonRes.success) {
-                // Determine if data is directly the quiz or nested
+                // กำหนดข้อมูลแบบทดสอบ (Determine if data is directly the quiz or nested)
                 quizData.value = lessonRes.data.quiz || lessonRes.data
-                lessonProgress.value = lessonRes.progress // Capture progress
+                lessonProgress.value = lessonRes.progress // บันทึกความคืบหน้า (Capture progress)
                 if (quizData.value?.time_limit) {
                     timeLeft.value = quizData.value.time_limit * 60
                 }
@@ -153,7 +177,7 @@ const loadData = async () => {
     }
 }
 
-// Helper for shuffling
+// ฟังก์ชันช่วยสุ่มเรียงลำดับอาร์เรย์ (Helper for shuffling)
 const shuffleArray = <T>(array: T[]): T[] => {
     return array
         .map(value => ({ value, sort: Math.random() }))
@@ -161,18 +185,18 @@ const shuffleArray = <T>(array: T[]): T[] => {
         .map(({ value }) => value)
 }
 
-// Quiz Actions
+// การกระทำในแบบทดสอบ (Quiz Actions)
 const startQuiz = () => {
-  // Deep copy to reset and apply shuffle
+  // รีเซ็ตข้อมูลโดยคัดลอกใหม่เพื่อนำมาสุ่ม (Deep copy to reset and apply shuffle)
   const rawQuiz = JSON.parse(JSON.stringify(quizData.value))
   
   if (rawQuiz) {
-      // Shuffle Questions
+      // สุ่มคำถาม (Shuffle Questions)
       if (rawQuiz.shuffle_questions && rawQuiz.questions) {
           rawQuiz.questions = shuffleArray(rawQuiz.questions)
       }
       
-      // Shuffle Choices
+      // สุ่มตัวเลือกคำตอบ (Shuffle Choices)
       if (rawQuiz.shuffle_choices && rawQuiz.questions) {
           rawQuiz.questions.forEach((q: any) => {
               if (q.choices) {
@@ -180,7 +204,7 @@ const startQuiz = () => {
               }
           })
       }
-      // Update state with shuffled data
+      // อัปเดตข้อมูลให้เป็นแบบสุ่ม (Update state with shuffled data)
       quizData.value = rawQuiz
   }
 
@@ -196,7 +220,7 @@ const startQuiz = () => {
       }, 1000)
   }
   
-  // Mark first as visited
+  // ทำเครื่องหมายข้อแรกว่าเปิดดูแล้ว (Mark first as visited)
   visitedQuestions.value = new Set([0])
 }
 
@@ -209,12 +233,12 @@ const selectAnswer = (choiceId: number) => {
 const nextQuestion = () => {
     if (!currentQuestion.value) return
 
-    // Allow skip if quiz is skippable or question is answered
+    // อนุญาตให้ข้ามได้หากโหมดข้ามเปิดอยู่ หรือ ตอบแล้ว (Allow skip if quiz is skippable or question is answered)
     const isAnswered = userAnswers.value[currentQuestion.value.id] !== undefined
     const isSkippable = quizData.value?.is_skippable
 
     if (!isAnswered && !isSkippable) {
-        // Show warning
+        // แสดงข้อความเตือน (Show warning)
         $q.notify({
             type: 'warning',
             message: t('quiz.pleaseSelectAnswer', 'กรุณาเลือกคำตอบ'),
@@ -241,7 +265,7 @@ const retryQuiz = () => {
 }
 
 const submitQuiz = async (auto = false) => {
-  // 1. Manual Validation: Check if all questions are answered
+  // 1. ตรวจสอบก่อนว่าทำครบทุกข้อหรือยัง (Manual Validation: Check if all questions are answered)
   if (!auto) {
      const answeredCount = Object.keys(userAnswers.value).length
      if (answeredCount < totalQuestions.value) {
@@ -254,7 +278,7 @@ const submitQuiz = async (auto = false) => {
         return
      }
 
-     // Premium Confirmation before submission
+     // หน้าต่างยืนยันส่งข้อสอบแบบสวยงาม (Premium Confirmation before submission)
      $q.dialog({
          title: `<div class="text-slate-900 dark:text-white font-black text-xl">${t('quiz.warningTitle')}</div>`,
          message: `<div class="text-slate-600 dark:text-slate-300 text-base leading-relaxed mt-2">${t('quiz.submitConfirm')}</div>`,
@@ -285,33 +309,33 @@ const submitQuiz = async (auto = false) => {
 }
 
 const processSubmitQuiz = async (auto = false) => {
-  // 2. Start Submission Process
+  // 2. เริ่มขั้นตอนการส่งข้อสอบ (Start Submission Process)
   if (timerInterval) clearInterval(timerInterval)
   
   isSubmitting.value = true
-  currentScreen.value = 'result' // Switch to result screen to show progress
+  currentScreen.value = 'result' // เปลี่ยนหน้าไปที่หน้าสรุปผล (Switch to result screen to show progress)
   
   try {
-      // Prepare Payload
+      // เตรียมข้อมูลยิง API (Prepare Payload)
       const answersPayload = Object.entries(userAnswers.value).map(([qId, cId]) => ({
           question_id: Number(qId),
           choice_id: cId
       }))
 
-      // Check if already passed
+      // ตรวจสอบว่าเคยผ่านแล้วหรือไม่ (Check if already passed)
       const alreadyPassed = lessonProgress.value?.is_passed || lessonProgress.value?.is_completed || false
 
-      // Call API
+      // เรียก API (Call API)
       const res = await apiSubmitQuiz(courseId, lessonId, answersPayload, alreadyPassed)
       
       if (res.success && res.data) {
           quizResult.value = res.data
-          // Update local progress if passed and not previously passed
+          // อัปเดตข้อมูลบนเว็บหากผ่านแบบทดสอบ (Update local progress if passed and not previously passed)
           if (res.data.is_passed && !alreadyPassed) {
              if (lessonProgress.value) lessonProgress.value.is_passed = true
           }
       } else {
-          // Fallback error handling
+          // การจัดการเมื่อเกิดข้อผิดพลาดฉุกเฉิน (Fallback error handling)
           $q.notify({
               type: 'negative',
               message: res.error || 'Failed to submit quiz'
@@ -364,14 +388,14 @@ const reviewQuiz = () => {
     currentScreen.value = 'review'
 }
 
-// Helper to get choice label (A, B, C...)
+// เปลี่ยน ID เป็นตัวอักษรเพื่อความสวยงาม (A, B, C...) (Helper to get choice label (A, B, C...))
 const getChoiceLabel = (index: number) => {
     return String.fromCharCode(65 + index) // 65 is 'A'
 }
 
 const getCorrectChoiceId = (questionId: number) => {
     if (!quizResult.value?.answers_review) return null
-    // Type checking for safety
+    // เช็คข้อมูลก่อนพัง (Type checking for safety)
     const review = Array.isArray(quizResult.value.answers_review) 
         ? quizResult.value.answers_review.find((r: any) => r.question_id === questionId)
         : null
@@ -384,7 +408,7 @@ const getCorrectChoiceId = (questionId: number) => {
     <q-page-container>
       <q-page>
         <div class="quiz-shell min-h-screen bg-slate-50 dark:bg-[#0b0f1a] text-slate-900 dark:text-slate-200 antialiased selection:bg-blue-500/20 transition-colors">
-    <!-- Header -->
+    <!-- ส่วนหัว (Header) -->
     <header class="h-14 bg-white dark:!bg-[var(--bg-surface)] fixed top-0 inset-x-0 z-[100] flex items-center px-6 border-b border-slate-200 dark:border-white/5 transition-colors">
       <div class="flex items-center w-full justify-between">
         <div class="flex items-center">
@@ -410,7 +434,7 @@ const getCorrectChoiceId = (questionId: number) => {
       </div>
     </header>
 
-    <!-- Main Content Area -->
+    <!-- พื้นที่เนื้อหาหลัก (Main Content Area) -->
     <main class="pt-14 h-screen flex items-center justify-center overflow-y-auto px-4 custom-scrollbar">
       
       <div v-if="isLoading" class="flex flex-col items-center gap-4">
@@ -435,9 +459,9 @@ const getCorrectChoiceId = (questionId: number) => {
       </div>
 
       <template v-else>
-          <!-- 1. START SCREEN -->
+          <!-- 1. หน้าเริ่มต้น (START SCREEN) -->
           <div v-if="currentScreen === 'start'" class="w-full max-w-[640px] animate-fade-in py-12">
-             <!-- ... (Start Screen is unchanged but needs to be here for context) ... -->
+             <!-- ... (หน้าแรกยังคงเหมือนเดิม แปะไว้เป็น reference) ... -->
              <div class="bg-white dark:!bg-[#1e293b] border border-slate-200 dark:border-white/5 rounded-[32px] p-8 md:p-14 shadow-lg dark:shadow-2xl relative overflow-hidden transition-colors">
                
                <div class="flex justify-center mb-10">
@@ -459,7 +483,7 @@ const getCorrectChoiceId = (questionId: number) => {
                  </p>
                </div>
 
-               <!-- Instruction Box -->
+               <!-- กล่องคำแนะนำ (Instruction Box) -->
                <div class="bg-slate-50 dark:bg-[#0b121f]/80 p-8 rounded-3xl mb-8 border border-slate-100 dark:border-white/5">
                   <h3 class="text-[12px] font-black text-slate-500 dark:text-slate-400 mb-6 uppercase tracking-[0.2em] flex items-center gap-2">
                      {{ $t('quiz.instructionTitle') }}
@@ -483,35 +507,58 @@ const getCorrectChoiceId = (questionId: number) => {
              </div>
           </div>
 
-          <!-- 2. TAKING SCREEN -->
+          <!-- 2. หน้าทำแบบทดสอบ (TAKING SCREEN) -->
-          <!-- 2. TAKING SCREEN -->
           <div v-if="currentScreen === 'taking'" class="w-full max-w-[840px] animate-fade-in py-12">
              <div v-if="currentQuestion" class="bg-white dark:!bg-[#1e293b] border border-slate-200 dark:border-white/5 rounded-[32px] p-8 md:p-12 shadow-xl relative overflow-hidden">
 
-                 <!-- Progress Bar -->
+                 <!-- แถบความคืบหน้า (Progress Bar) -->
                  <div class="absolute top-0 left-0 right-0 h-1.5 bg-slate-100 dark:bg-white/5">
                      <div class="h-full bg-blue-500 transition-all duration-300" :style="{ width: ((currentQuestionIndex + 1) / totalQuestions) * 100 + '%' }"></div>
                  </div>
 
-                 <!-- Question Map / Pagination -->
+                 <!-- แผนที่คำถาม / การเปลี่ยนหน้า (Question Map / Pagination) -->
-                 <div class="flex flex-wrap gap-2 mb-8 mt-4">
+                 <div class="flex items-center justify-center gap-2 mb-8 mt-4 select-none bg-slate-50 dark:bg-[#0b121f]/50 p-2 rounded-2xl border border-slate-100 dark:border-white/5 w-fit mx-auto">
+                     <!-- ปุ่มย้อนกลับ (หน้าก่อนหน้า) -->
                      <button 
-                         v-for="(q, idx) in quizData?.questions"
+                        v-if="totalQuestionPages > 1" 
-                         :key="q.id"
+                        @click="prevQuestionPage" 
-                         @click="jumpToQuestion(Number(idx))"
+                        :disabled="questionPage === 0"
-                         class="w-8 h-8 md:w-10 md:h-10 rounded-lg flex items-center justify-center text-xs md:text-sm font-bold transition-all border"
+                        class="w-8 h-8 md:w-10 md:h-10 rounded-lg flex items-center justify-center transition-all flex-shrink-0"
-                         :class="getQuestionStatusClass(Number(idx), q.id)"
+                        :class="questionPage === 0 ? 'text-slate-300 dark:text-slate-600 bg-transparent cursor-not-allowed' : 'text-slate-600 dark:text-slate-300 bg-white dark:bg-[#1e293b] hover:bg-slate-200 dark:hover:bg-white/10 shadow-sm border border-slate-200 dark:border-white/10 text-lg hover:-translate-x-0.5'"
                      >
-                         {{ Number(idx) + 1 }}
+                         <q-icon name="chevron_left" />
+                     </button>
+                     
+                     <div class="flex flex-wrap items-center justify-center gap-2">
+                         <button
+                             v-for="q in visibleQuestions"
+                             :key="q.id"
+                             @click="jumpToQuestion(q.originalIndex)"
+                             class="w-8 h-8 md:w-10 md:h-10 rounded-lg flex items-center justify-center text-xs md:text-sm font-bold transition-all border"
+                             :class="getQuestionStatusClass(q.originalIndex, q.id)"
+                         >
+                             {{ q.originalIndex + 1 }}
                          </button>
                      </div>
                      
-                 <!-- Question Title -->
+                     <!-- ปุ่มถัดไป (หน้าถัดไป) -->
+                     <button 
+                        v-if="totalQuestionPages > 1" 
+                        @click="nextQuestionPage" 
+                        :disabled="questionPage === totalQuestionPages - 1"
+                        class="w-8 h-8 md:w-10 md:h-10 rounded-lg flex items-center justify-center transition-all flex-shrink-0"
+                        :class="questionPage === totalQuestionPages - 1 ? 'text-slate-300 dark:text-slate-600 bg-slate-100 dark:bg-white/5 cursor-not-allowed' : 'text-slate-600 dark:text-slate-300 bg-white dark:bg-[#1e293b] hover:bg-slate-100 dark:hover:bg-white/10 shadow-sm border border-slate-200 dark:border-white/10 text-lg hover:translate-x-0.5'"
+                     >
+                         <q-icon name="chevron_right" />
+                     </button>
+                 </div>
+
+                 <!-- ชื่อคำถาม (Question Title) -->
                  <h3 class="text-xl md:text-2xl font-bold text-slate-900 dark:text-white mb-10 leading-relaxed">
                      {{ getLocalizedText(currentQuestion.question) }}
                  </h3>
 
-                 <!-- Choices -->
+                 <!-- ส่วนการเลือกคำตอบ (Choices) -->
                  <div class="flex flex-col gap-4 mb-12">
                      <button 
                          v-for="choice in currentQuestion.choices" 
@@ -533,7 +580,7 @@ const getCorrectChoiceId = (questionId: number) => {
 
 
 
-                 <!-- Controls -->
+                 <!-- ปุ่มควบคุมต่างๆ (Controls) -->
                  <div class="flex justify-between items-center pt-8 border-t border-slate-100 dark:border-white/5">
                      <button 
                          @click="prevQuestion" 
@@ -563,7 +610,7 @@ const getCorrectChoiceId = (questionId: number) => {
 
 
 
-           <!-- 3. RESULT SCREEN -->
+           <!-- 3. หน้าผลลัพธ์การทำแบบทดสอบ (RESULT SCREEN) -->
           <div v-if="currentScreen === 'result'" class="w-full max-w-[640px] animate-fade-in py-12">
              <div class="bg-white dark:!bg-[#1e293b] border border-slate-200 dark:border-white/5 rounded-[40px] p-10 shadow-2xl text-center relative overflow-hidden">
                  
@@ -586,7 +633,7 @@ const getCorrectChoiceId = (questionId: number) => {
                      </p>
                  </div>
 
-                 <!-- Score Card -->
+                 <!-- บัตรแสดงคะแนน (Score Card) -->
                  <div class="bg-slate-50 dark:bg-[#0b121f] rounded-3xl p-6 mb-8 flex items-center justify-around border border-slate-100 dark:border-white/5">
                      <div class="text-center">
                          <div class="text-xs font-black text-slate-400 uppercase tracking-widest mb-1">{{ $t('quiz.scoreLabel') }}</div>
@@ -626,7 +673,7 @@ const getCorrectChoiceId = (questionId: number) => {
              </div>
           </div>
 
-          <!-- 4. REVIEW SCREEN -->
+          <!-- 4. หน้าทบทวนข้อสอบ (REVIEW SCREEN) -->
           <div v-if="currentScreen === 'review'" class="w-full max-w-[840px] animate-fade-in py-12 pb-24">
              <div class="space-y-6">
                  <div 
@@ -652,7 +699,7 @@ const getCorrectChoiceId = (questionId: number) => {
                                       'border-slate-100 dark:border-white/5 opacity-80 dark:opacity-40': userAnswers[question.id] !== choice.id && choice.id !== getCorrectChoiceId(question.id)
                                   }"
                                 >
-                                    <!-- Indicator Icon -->
+                                    <!-- ไอคอนสถานะ (Indicator Icon) -->
                                     <div 
                                       class="w-8 h-8 rounded-full flex items-center justify-center flex-shrink-0 font-bold text-sm border-2"
                                       :class="{
@@ -668,7 +715,7 @@ const getCorrectChoiceId = (questionId: number) => {
 
                                     <span class="font-medium text-slate-700 dark:text-slate-300">{{ getLocalizedText(choice.text) }}</span>
                                     
-                                    <!-- Label Badge -->
+                                    <!-- ป้ายแสดงสถานะ (Label Badge) -->
                                     <div v-if="choice.id === getCorrectChoiceId(question.id)" class="ml-auto px-2 py-0.5 bg-emerald-100 dark:bg-emerald-500/20 text-emerald-700 dark:text-emerald-300 text-xs font-bold rounded uppercase tracking-wider">
                                         {{ $t('quiz.correctLabel', 'Correct') }}
                                     </div>
@@ -695,11 +742,11 @@ const getCorrectChoiceId = (questionId: number) => {
     </main>
 
 
-        </div> <!-- Close quiz-shell -->
+        </div> <!-- ปิดส่วนเปลือกข้อสอบ (Close quiz-shell) -->
 
 
-       <!-- Question Navigator Sidebar/Floating (Desktop) - Outside Main Flow -->
+       <!-- ป๊อปอัปแผนที่คำถาม (เดสก์ท็อป) - อยู่นอกพื้นที่ทำงานปกติ (Question Navigator Sidebar/Floating (Desktop) - Outside Main Flow) -->
-       <!-- Using QPageSticky properly inside q-page/q-layout context we added -->
+       <!-- ใช้งาน QPageSticky ให้ถูกที่ (Using QPageSticky properly inside q-page/q-layout context we added) -->
       <q-page-sticky
         v-if="false"
         position="top-right"

Frontend-Learner/pages/course/[id].vue

@@ -1,8 +1,8 @@
 <script setup lang="ts">
 /**
  * @file [id].vue
- * @description Dynamic Course Detail Page.
+ * @description หน้าแสดงรายละเอียดคอร์ส (Dynamic Course Detail Page)
- * Displays detailed information about a specific course based on the ID.
+ * ดึงข้อมูลคอร์สเรียนตาม ID ที่ส่งมาใน URL และมีปุ่มสำหรับចុះทะเบียน
  */
 
 definePageMeta({
@@ -114,7 +114,7 @@ useHead({
         />
       </div>
       
-      <!-- Loading / Error State -->
+      <!-- ส่วนแสดงผลขณะโหลดข้อมูลหรือเกิดข้อผิดพลาด (Loading / Error State) -->
       <div v-else class="text-center py-20">
          <div v-if="error" class="text-red-500 mb-4">
              <p class="font-bold">เกิดข้อผิดพลาดในการโหลดข้อมูล</p>

Frontend-Learner/pages/dashboard/announcements.vue

@@ -1,17 +1,17 @@
 <script setup lang="ts">
 /**
  * @file announcements.vue
- * @description Page displaying system and course-related announcements.
+ * @description หน้าแสดงประกาศระบบและข่าวสารเกี่ยวกับคอร์สเรียน (Page displaying system and course-related announcements.)
- * Uses the default layout and requires authentication.
+ * ใช้เลย์เอาต์เริ่มต้นและต้องตรวจสอบสิทธิ์ (Uses the default layout and requires authentication.)
  */
 
-// Define page metadata: usage of 'default' layout and 'auth' middleware
+// ข้อมูล metadata ของหน้า: ใช้เลย์เอาต์ 'default' และระบบตรวจสอบสิทธิ์ 'auth' (Define page metadata: usage of 'default' layout and 'auth' middleware)
 definePageMeta({
   layout: 'default',
   middleware: 'auth'
 })
 
-// Set page title for SEO
+// กำหนดชื่อหัวหน้าเว็บสำหรับ SEO (Set page title for SEO)
 useHead({
   title: 'ประกาศ - e-Learning'
 })
@@ -19,22 +19,22 @@ useHead({
 
 <template>
   <div class="page-container">
-    <!-- Page Header -->
+    <!-- ส่วนหัวหน้าเว็บ (Page Header) -->
     <h1 class="text-3xl font-black mb-10 text-slate-900 dark:text-white">ประกาศ</h1>
 
     <!-- 
-      Main Layout: 12-column Grid 
+      โครงสร้างหลัก: กริด 12 คอลัมน์ (Main Layout: 12-column Grid)
-      - Left Column (span-8): Main announcements content
+      - คอลัมน์ซ้าย (span-8): เนื้อหาประกาศหลัก (Left Column: Main announcements content)
-      - Right Column (span-4): Categories/Filter sidebar
+      - คอลัมน์ขวา (span-4): แถบหมวดหมู่/ตัวกรอง (Right Column: Categories/Filter sidebar)
     -->
     <div class="grid-12">
       
       <!-- ==========================================
-           MAIN CONTENT AREA (Left)
+           พื้นที่เนื้อหาหลัก (ด้านซ้าย) (MAIN CONTENT AREA (Left))
       ========================================== -->
       <div class="col-span-8">
         
-        <!-- Feature 1: Critical System Announcement -->
+        <!-- หน้าที่ 1: ประกาศระบบสำคัญ (Feature 1: Critical System Announcement) -->
         <div class="card mb-6">
           <div class="flex items-center gap-2 mb-2">
             <span class="status-pill status-warning">สำคัญ</span>
@@ -42,13 +42,13 @@ useHead({
           </div>
           <h2 class="text-xl font-bold mb-4 text-slate-900 dark:text-white">แจ้งปิดปรับปรุงระบบ</h2>
           <p class="mb-4">เราจะทำการปิดปรับปรุงระบบในวันที่ 25 ธ.ค. เวลา 02:00 - 04:00 น. ขออภัยในความไม่สะดวก</p>
-          <!-- Attachment Block -->
+          <!-- ส่วนแนบไฟล์ (Attachment Block) -->
           <div class="flex items-center gap-2 p-3 rounded" style="background: var(--neutral-50); border: 1px solid var(--border-color); width: fit-content;">
             <span>📎</span> <span class="text-sm font-bold">ตารางการปิดปรับปรุง.pdf</span>
           </div>
         </div>
 
-        <!-- Announcement: UX/UI Course Update -->
+        <!-- ประกาศ: อัปเดตคอร์ส UX/UI (Announcement: UX/UI Course Update) -->
         <div class="card mb-4" style="border-left: 4px solid var(--primary);">
           <div class="flex justify-between items-start mb-2" style="flex-wrap: wrap; gap: 8px;">
             <div>
@@ -61,7 +61,7 @@ useHead({
           <NuxtLink to="/browse/discovery" class="text-sm" style="color: var(--primary);">ดูรายละเอียดคอร์ส</NuxtLink>
         </div>
 
-        <!-- Announcement: Accessibility (WCAG) Material -->
+        <!-- ประกาศ: เอกสารประกอบการเรียนด้านการเข้าถึงเว็บ (WCAG) (Announcement: Accessibility (WCAG) Material) -->
         <div class="card mb-4" style="border-left: 4px solid var(--success);">
           <div class="flex justify-between items-start mb-2" style="flex-wrap: wrap; gap: 8px;">
             <div>
@@ -71,13 +71,13 @@ useHead({
             <span class="text-sm text-slate-600 dark:text-slate-400">22 ธ.ค. 2024</span>
           </div>
           <p class="text-slate-700 dark:text-slate-300 mb-2">เราได้เพิ่มไฟล์ PDF สรุปเกณฑ์ WCAG 2.2 ในส่วนของเอกสารประกอบการเรียนแล้ว...</p>
-          <!-- Small Attachment -->
+          <!-- ไฟล์แนบแบบเล็ก (Small Attachment) -->
           <div class="flex items-center gap-2 p-2 rounded mt-2" style="background: var(--neutral-50); border: 1px dotted var(--border-color); width: fit-content;">
             <span>📄</span> <span class="text-xs">WCAG_2.2_Summary.pdf</span>
           </div>
         </div>
 
-        <!-- Announcement: React Course Update -->
+        <!-- ประกาศ: อัปเดตคอร์ส React (Announcement: React Course Update) -->
         <div class="card mb-4" style="border-left: 4px solid var(--warning);">
           <div class="flex justify-between items-start mb-2" style="flex-wrap: wrap; gap: 8px;">
             <div>
@@ -90,7 +90,7 @@ useHead({
           <NuxtLink to="/classroom/learning" class="btn btn-secondary text-sm" style="width: fit-content;">เข้าสู่บทเรียน</NuxtLink>
         </div>
 
-        <!-- Announcement: General New Course -->
+        <!-- ประกาศ: คอร์สใหม่ทั่วไป (Announcement: General New Course) -->
         <div class="card mb-4">
           <div class="flex justify-between items-start mb-2" style="flex-wrap: wrap; gap: 8px;">
             <h3 class="font-bold text-slate-900 dark:text-white">คอร์สใหม่: Advanced Python</h3>
@@ -100,7 +100,7 @@ useHead({
           <a href="#" class="text-sm" style="color: var(--primary);">อ่านเพิ่มเติม</a>
         </div>
 
-        <!-- Announcement: Platform Update -->
+        <!-- ประกาศ: อัปเดตแพลตฟอร์ม (Announcement: Platform Update) -->
         <div class="card mb-4">
           <div class="flex justify-between items-start mb-2" style="flex-wrap: wrap; gap: 8px;">
             <h3 class="font-bold text-slate-900 dark:text-white">ยินดีต้อนรับสู่ดีไซน์ใหม่!</h3>
@@ -112,24 +112,24 @@ useHead({
       </div>
 
       <!-- ==========================================
-           SIDEBAR (Right)
+           แถบด้านข้าง (ด้านขวา) (SIDEBAR (Right))
-           Category Filters
+           ตัวกรองหมวดหมู่ (Category Filters)
       ========================================== -->
       <div class="col-span-4">
         <div class="card">
           <h3 class="font-bold mb-4 text-slate-900 dark:text-white">หมวดหมู่</h3>
           <ul class="flex flex-col gap-2">
-            <!-- Filter Option: All -->
+            <!-- ตัวเลือกตัวกรอง: ทั้งหมด (Filter Option: All) -->
             <li class="flex justify-between items-center p-2 rounded cursor-pointer" style="background: var(--neutral-50);">
               <span>ทั้งหมด</span>
               <span class="text-muted">15</span>
             </li>
-            <!-- Filter Option: System Updates -->
+            <!-- ตัวเลือกตัวกรอง: อัปเดตระบบ (Filter Option: System Updates) -->
             <li class="flex justify-between items-center p-2 rounded cursor-pointer">
               <span>อัปเดตระบบ</span>
               <span class="text-muted">3</span>
             </li>
-            <!-- Filter Option: Course News -->
+            <!-- ตัวเลือกตัวกรอง: ข่าวสารคอร์ส (Filter Option: Course News) -->
             <li class="flex justify-between items-center p-2 rounded cursor-pointer">
               <span>ข่าวสารคอร์ส</span>
               <span class="text-muted">11</span>

Frontend-Learner/pages/dashboard/index.vue

@@ -126,7 +126,7 @@ const navigateToCategory = (catName: string) => {
   <div class="bg-[#F8F9FA] dark:bg-[#020617] min-h-screen font-inter p-4 md:p-8 transition-colors duration-300">
     <div class="max-w-[1400px] mx-auto grid grid-cols-1 xl:grid-cols-3 gap-8">
       
-      <!-- Left Column (Main Content) -->
+      <!-- คอลัมน์ซ้าย (เนื้อหาหลัก) -->
       <div class="xl:col-span-2 space-y-6">
         
         <!-- ป้ายต้อนรับ (Welcome Banner) -->
@@ -179,7 +179,7 @@ const navigateToCategory = (catName: string) => {
             </div>
         </div>
 
-        <!-- Continue Learning (เรียนต่อจากครั้งก่อน) -->
+        <!-- ส่วนเรียนต่อจากครั้งก่อน (Continue Learning) -->
         <div class="bg-white dark:!bg-slate-900 rounded-[2rem] p-6 md:p-8 shadow-sm border border-slate-100 dark:border-slate-800 transition-colors">
           <div class="flex items-center justify-between mb-6">
              <h2 class="text-[1.35rem] font-bold text-slate-900 dark:text-white tracking-tight">{{ $t('dashboard.continueLearningTitle') }}</h2>
@@ -195,7 +195,7 @@ const navigateToCategory = (catName: string) => {
              
              <div class="flex-1 w-full flex flex-col">
                 <div class="flex items-center justify-between mb-3">
-                   <!-- Category Badge -->
+                   <!-- ป้ายบอกหมวดหมู่ (Category Badge) -->
                    <div v-if="heroCourse.category">
                       <span class="bg-[#E9EFFD] dark:bg-blue-900/40 text-[#3B6BE8] dark:text-blue-400 px-3 py-1 rounded-full text-[11px] font-bold tracking-wide">{{ getLocalizedText(heroCourse.category) }}</span>
                    </div>
@@ -208,7 +208,7 @@ const navigateToCategory = (catName: string) => {
                 <h3 class="text-2xl font-bold text-slate-900 dark:text-white mb-2 leading-snug line-clamp-2">
                   {{ getLocalizedText(heroCourse.title) || 'Advanced UI/UX Design มาสเตอร์คลาส' }}
                 </h3>
-                <!-- Removed Lesson Title/Number as per request -->
+                <!-- ไม่แสดงเลขบทเรียนตามที่ได้รับคำขอมา (Removed Lesson Title/Number as per request) -->
                 
                 <div class="mb-6 mt-4">
                    <div class="flex justify-between text-[13px] font-bold mb-2">
@@ -245,11 +245,11 @@ const navigateToCategory = (catName: string) => {
         </div>
       </div>
       
-      <!-- Right Column (Sidebar/Profile Content) -->
+      <!-- คอลัมน์ขวา (แถบข้อมูลโปรไฟล์และคอร์สแนะนำ) -->
       <div class="xl:col-span-1 space-y-6">
-         <!-- Profile Widget -->
+         <!-- วิดเจ็ตโปรไฟล์ผู้ใช้ -->
          <div class="bg-white dark:!bg-slate-900 rounded-[2rem] p-8 shadow-sm border border-slate-100 dark:border-slate-800 text-center flex flex-col items-center relative overflow-hidden transition-colors">
-            <!-- decorative bg -->
+            <!-- พื้นหลังตกแต่ง (decorative bg) -->
             <div class="absolute top-0 left-0 right-0 h-24 bg-gradient-to-b from-[#F8FAFC] to-white dark:from-slate-800 dark:to-slate-900"></div>
 
             <div class="relative z-10 w-24 h-24 rounded-full bg-white dark:bg-slate-800 mb-4 shadow-md flex items-center justify-center">
@@ -270,28 +270,28 @@ const navigateToCategory = (catName: string) => {
             
             <div class="flex w-full gap-3 mt-7 relative z-10 px-2">
                 <div class="flex-1 bg-[#F8FAFC] dark:bg-slate-800 rounded-2xl p-3.5 flex flex-col items-center justify-center transition-colors shadow-sm">
-                   <span class="text-[1.35rem] font-black text-[#3B6BE8] dark:text-blue-400 mb-1 leading-none">{{ String(enrolledCourses.length || 0).padStart(2, '0') }}</span>
+                   <span class="text-[1.35rem] font-black text-[#3B6BE8] dark:text-blue-400 mb-1 leading-none">{{ enrolledCourses.length || 0 }}</span>
-                   <span class="text-slate-400 text-[10px] font-bold tracking-wider">{{ $t('myCourses.filterProgress') }}</span>
+                   <span class="text-slate-400 text-[10px] font-bold tracking-wider">{{ $t('sidebar.onlineCourses') }}</span>
                 </div>
                 <div class="flex-1 bg-[#F8FAFC] dark:bg-slate-800 rounded-2xl p-3.5 flex flex-col items-center justify-center transition-colors shadow-sm">
-                   <span class="text-[1.35rem] font-black text-[#10B981] dark:text-emerald-400 mb-1 leading-none z-10">{{ String(enrolledCourses.filter(c => c.progress >= 100).length || 0).padStart(2, '0') }}</span>
+                   <span class="text-[1.35rem] font-black text-[#10B981] dark:text-emerald-400 mb-1 leading-none z-10">{{ enrolledCourses.filter(c => c.progress >= 100).length || 0 }}</span>
                    <span class="text-slate-400 text-[10px] font-bold tracking-wider z-10">{{ $t('myCourses.filterCompleted') }}</span>
                 </div>
             </div>
          </div>
          
-         <!-- Recommended Courses Widget -->
+         <!-- วิดเจ็ตคอร์สแนะนำ -->
          <div v-if="recommendedCourses.length > 0" class="bg-white dark:!bg-slate-900 rounded-[2rem] p-6 shadow-sm border border-slate-100 dark:border-slate-800 transition-colors">
              <h2 class="text-[1.1rem] font-bold text-slate-900 dark:text-white mb-5 tracking-tight flex items-center justify-between">
                {{ $t('dashboard.recommendedCourses') }}
              </h2>
             <div class="flex flex-col gap-5">
                <div v-for="course in recommendedCourses.slice(0, 3)" :key="course.id" class="flex gap-4 group cursor-pointer transition-all" @click="navigateTo(`/browse/discovery?course_id=${course.id}`)">
-                  <!-- Thumbnail -->
+                  <!-- รูปหน้าปก (Thumbnail) -->
                   <div class="w-24 h-[68px] rounded-xl overflow-hidden bg-slate-100 shrink-0 relative shadow-sm">
                      <img :src="course.image" class="w-full h-full object-cover group-hover:scale-105 transition-transform duration-500" />
                   </div>
-                  <!-- Info -->
+                  <!-- ข้อมูลคอร์ส (Info) -->
                   <div class="flex-1 flex flex-col justify-center min-w-0">
                      <h3 class="font-bold text-[13px] text-slate-900 dark:text-white leading-snug line-clamp-2 mb-1.5 group-hover:text-[#3B6BE8] transition-colors pr-1">{{ getLocalizedText(course.title) }}</h3>
                      <div class="flex items-center justify-between mt-auto">

Frontend-Learner/pages/dashboard/my-courses.vue

@@ -171,17 +171,17 @@ onMounted(() => {
         
         <div class="grid grid-cols-1 lg:grid-cols-2 gap-6">
           <div v-for="course in inProgressCourses.slice(0, 2)" :key="course.id" class="border border-slate-100 dark:border-slate-800 rounded-3xl p-4 flex flex-col sm:flex-row gap-5 items-center bg-[#F8FAFC] dark:bg-slate-800/50 hover:border-blue-100 dark:hover:border-blue-900/50 transition-colors">
-            <!-- Image -->
+            <!-- ส่วนรูปภาพหน้าปก (Image) -->
             <div class="w-full sm:w-[160px] h-[120px] rounded-[1.25rem] overflow-hidden bg-slate-200 shrink-0 relative group">
                <img :src="course.thumbnail_url" class="w-full h-full object-cover group-hover:scale-105 transition-transform duration-500"/>
-               <!-- Quick play overlay -->
+               <!-- เลเยอร์เล่นวิดีโอด่วน (Quick play overlay) -->
                <div @click="navigateTo(`/classroom/learning?course_id=${course.id}`)" class="absolute inset-0 bg-black/40 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center cursor-pointer">
                   <div class="bg-white/30 backdrop-blur-md rounded-full w-10 h-10 flex flex-col items-center justify-center">
                       <q-icon name="play_arrow" color="white" size="20px" class="ml-0.5" />
                   </div>
                </div>
             </div>
-            <!-- Info -->
+            <!-- ส่วนข้อมูลเนื้อหา (Info) -->
             <div class="flex-1 flex flex-col justify-center min-w-0 py-1 w-full">
                <div class="mb-2" v-if="course.category_name">
                   <span class="bg-[#E9EFFD] dark:bg-blue-900/40 text-[#3B6BE8] dark:text-blue-400 px-3.5 py-1.5 rounded-full text-[10px] font-bold tracking-wide">{{ course.category_name }}</span>
@@ -249,19 +249,19 @@ onMounted(() => {
         
         <div v-else-if="filteredEnrolledCourses.length > 0">
            
-           <!-- GRID VIEW -->
+           <!-- หมวดแสดงสไตล์กริดตาราง (GRID VIEW) -->
            <div v-if="viewMode === 'grid'" class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
               <div v-for="course in filteredEnrolledCourses" :key="course.id" class="flex flex-col rounded-[1.5rem] bg-white dark:!bg-slate-900 border border-slate-100 dark:border-slate-800 overflow-hidden shadow-sm hover:shadow-[0_8px_30px_rgb(0,0,0,0.06)] transition-all duration-300 group cursor-pointer" @click="navigateTo(`/classroom/learning?course_id=${course.id}`)">
-                 <!-- Thumbnail -->
+                 <!-- ส่วนรูปภาพหน้าปก (Thumbnail) -->
                  <div class="relative w-full aspect-[4/3] bg-slate-100 dark:bg-slate-800 overflow-hidden">
                     <img :src="course.thumbnail_url" class="w-full h-full object-cover group-hover:scale-105 transition-transform duration-500" />
-                    <!-- Badge inside Image Map Top Left -->
+                    <!-- ป้ายหมวดหมู่บนมุมซ้ายของรูป (Badge inside Image Map Top Left) -->
                     <div v-if="course.category_name" class="absolute top-3 left-3 bg-white/95 dark:bg-slate-900/95 backdrop-blur-md text-[#3B6BE8] dark:text-blue-400 font-bold text-[10px] px-3.5 py-1 rounded-full shadow-sm">
                        {{ course.category_name }}
                     </div>
                  </div>
                  
-                 <!-- Card Body -->
+                 <!-- ตัวการ์ด (Card Body) -->
                  <div class="p-5 flex flex-col flex-1">
                     <h3 class="font-bold text-slate-900 dark:text-white text-[14px] leading-snug line-clamp-2 mb-3">{{ getLocalizedText(course.title) }}</h3>
                     
@@ -275,11 +275,11 @@ onMounted(() => {
                            </div>
                        </div>
                         <div class="flex flex-col sm:flex-row items-stretch sm:items-center gap-2 mt-3 sm:mt-0">
-                            <!-- Certificate Button -->
+                            <!-- ปุ่มดาวน์โหลดใบเซอร์ (Certificate Button) -->
                             <button v-if="course.completed" @click.stop="handleDownloadCertificate(course.id)" class="border border-green-100 bg-green-50 text-green-600 dark:border-green-900/50 dark:bg-green-900/30 dark:text-green-400 rounded-full px-3 py-1.5 text-[11px] font-bold hover:bg-green-100 dark:hover:bg-green-900/50 transition-colors shrink-0 flex items-center justify-center gap-1">
                               <q-icon name="workspace_premium" size="14px" /> {{ $t('course.certificate') }}
                             </button>
-                            <!-- Continue/Replay Button -->
+                            <!-- ปุ่มเรียนต่อหรือเรียนซ้ำ (Continue/Replay Button) -->
                             <button class="bg-[#3B6BE8] text-white border-transparent hover:bg-blue-700 shadow-sm rounded-full px-5 py-1.5 text-[11px] font-bold transition-colors shrink-0 text-center cursor-pointer">
                                {{ course.completed ? $t('course.studyAgain') : $t('dashboard.continue') }}
                             </button>
@@ -289,20 +289,20 @@ onMounted(() => {
               </div>
            </div>
 
-           <!-- LIST VIEW -->
+           <!-- หมวดแสดงสไตล์บรรทัดรายการ (LIST VIEW) -->
            <div v-else class="flex flex-col gap-4">
               <div v-for="course in filteredEnrolledCourses" :key="course.id" class="flex flex-col sm:flex-row items-center rounded-[1.5rem] bg-white dark:!bg-slate-900 border border-slate-100 dark:border-slate-800 p-4 gap-6 shadow-sm hover:shadow-[0_8px_30px_rgb(0,0,0,0.06)] transition-all duration-300 cursor-pointer group" @click="navigateTo(`/classroom/learning?course_id=${course.id}`)">
                  
-                 <!-- Thumbnail Left -->
+                 <!-- ส่วนภาพหน้าปกด้านซ้าย (Thumbnail Left) -->
                  <div class="relative w-full sm:w-[240px] aspect-[16/10] sm:aspect-auto sm:h-[130px] rounded-2xl bg-slate-100 dark:bg-slate-800 overflow-hidden shrink-0">
                     <img :src="course.thumbnail_url" class="w-full h-full object-cover group-hover:scale-105 transition-transform duration-500" />
-                    <!-- Badge inside Image -->
+                    <!-- ป้ายหมวดหมู่ในรูปภาพ (Badge inside Image) -->
                     <div v-if="course.category_name" class="absolute top-2.5 left-2.5 bg-white/95 dark:bg-slate-900/95 backdrop-blur-md text-[#3B6BE8] dark:text-blue-400 font-bold text-[10px] px-3.5 py-1 rounded-full shadow-sm">
                        {{ course.category_name }}
                     </div>
                  </div>
 
-                 <!-- Content Right -->
+                 <!-- เนื้อหาอยู่ทางขวา (Content Right) -->
                  <div class="flex-1 w-full flex flex-col md:flex-row gap-6 md:items-center">
                     
                     <div class="flex-1 min-w-0">
@@ -310,7 +310,7 @@ onMounted(() => {
 
                     </div>
 
-                    <!-- Progress and Button Zone -->
+                    <!-- โซนความคืบหน้าและปุ่มกด (Progress and Button Zone) -->
                     <div class="flex md:flex-col items-center md:items-end justify-between md:justify-center gap-4 shrink-0 md:w-[200px]">
                         <div class="w-full max-w-[140px] md:max-w-full">
                            <div class="flex justify-between items-center text-[11px] font-bold text-slate-700 dark:text-slate-300 mb-2 tracking-wide">
@@ -323,11 +323,11 @@ onMounted(() => {
                         </div>
 
                         <div class="flex flex-col items-stretch md:items-end gap-2 mt-3 sm:mt-0 w-full sm:w-auto">
-                            <!-- Certificate Button -->
+                            <!-- ปุ่มดาวน์โหลดใบเซอร์ (Certificate Button) -->
                             <button v-if="course.completed" @click.stop="handleDownloadCertificate(course.id)" class="border border-green-100 bg-green-50 text-green-600 dark:border-green-900/50 dark:bg-green-900/30 dark:text-green-400 rounded-full px-4 py-2 text-[12px] font-bold hover:bg-green-100 dark:hover:bg-green-900/50 transition-colors shrink-0 flex items-center justify-center gap-1 w-full sm:w-auto">
                               <q-icon name="workspace_premium" size="16px" /> {{ $t('course.downloadCertificate') }}
                             </button>
-                            <!-- Continue/Replay Button -->
+                            <!-- ปุ่มเรียนต่อหรือเรียนซ้ำ (Continue/Replay Button) -->
                             <button class="bg-[#3B6BE8] text-white border-transparent hover:bg-blue-700 shadow-sm rounded-full px-6 py-2 text-[12px] font-bold transition-colors shrink-0 text-center w-full sm:w-auto cursor-pointer">
                               {{ course.completed ? $t('course.studyAgain') : $t('dashboard.continue') }}
                             </button>
@@ -340,7 +340,7 @@ onMounted(() => {
 
         </div>
         
-        <!-- Empty filter state -->
+        <!-- กรณีที่ค้นหา/กรองแล้วไม่พบข้อมูล (Empty filter state) -->
         <div v-else class="flex flex-col items-center justify-center py-20">
           <q-icon name="search_off" size="48px" class="text-slate-300 dark:text-slate-600 mb-4" />
           <h3 class="text-lg font-bold text-slate-900 dark:text-white mb-2">{{ $t('myCourses.searchNoResult') }}</h3>
@@ -350,7 +350,7 @@ onMounted(() => {
     
     </div>
 
-    <!-- MODAL: Enrollment Success -->
+    <!-- หน้าต่างแจ้งเตือน: ลงทะเบียนสำเร็จ (MODAL: Enrollment Success) -->
     <q-dialog v-model="showEnrollModal" backdrop-filter="blur(4px)">
       <q-card class="rounded-[1.5rem] shadow-2xl p-8 max-w-sm w-full text-center relative overflow-hidden bg-white dark:bg-slate-800">
         <div class="absolute top-0 left-0 w-full h-2 bg-gradient-to-r from-green-400 to-emerald-600"></div>

Frontend-Learner/pages/dashboard/profile.vue

@@ -67,22 +67,22 @@ const showPassword = reactive({
 })
 
 
-// Rules have been moved to components
+// กฎต่างๆ ถูกย้ายไปที่คอมโพเนนต์แล้ว (Rules have been moved to components)
 
-const fileInput = ref<HTMLInputElement | null>(null) // Used in view mode (outside component)
+const fileInput = ref<HTMLInputElement | null>(null) // ใช้ในโหมดมุมมอง (อยู่นอกคอมโพเนนต์) (Used in view mode (outside component))
 
 const toggleEdit = (edit: boolean) => {
   isEditing.value = edit
 }
 
-// Updated to accept File object directly (or Event for view mode compatibility if needed)
+// อัปเดตให้รับออบเจ็กต์ File ได้โดยตรง (หรือ Event สำหรับความเข้ากันได้ของโหมดมุมมองหากจำเป็น) (Updated to accept File object directly (or Event for view mode compatibility if needed))
 const handleFileUpload = async (fileOrEvent: File | Event) => {
   let file: File | null = null
 
   if (fileOrEvent instanceof File) {
     file = fileOrEvent
   } else {
-    // Fallback for native input change event
+    // การทำงานสำรองสำหรับอีเวนต์ input change แบบเนทีฟ (Fallback for native input change event)
     const target = (fileOrEvent as Event).target as HTMLInputElement
     if (target.files && target.files[0]) {
       file = target.files[0]
@@ -112,7 +112,7 @@ const handleFileUpload = async (fileOrEvent: File | Event) => {
   }
 }
 
-// Trigger upload for VIEW mode avatar click
+// เรียกการอัปโหลดเมื่อคลิกที่รูปโปรไฟล์ในโหมด View (Trigger upload for VIEW mode avatar click)
 const triggerUpload = () => {
     fileInput.value?.click()
 }
@@ -191,7 +191,7 @@ const handleUpdatePassword = async () => {
   isPasswordSaving.value = false
 }
 
-// Watch for changes in global user state (e.g. after avatar upload or profile update)
+// เฝ้าดูการเปลี่ยนแปลงในสถานะผู้ใช้ส่วนกลาง (เช่น หลังจากอัปโหลดรูปโปรไฟล์หรืออัปเดตข้อมูลส่วนตัว) (Watch for changes in global user state (e.g. after avatar upload or profile update))
 watch(() => currentUser.value, (newUser) => {
   if (newUser) {
     userData.value.photoURL = newUser.photoURL || ''
@@ -220,7 +220,7 @@ onMounted(async () => {
        <q-spinner size="3rem" color="primary" />
     </div>
 
-    <!-- MAIN PROFILE SETTINGS -->
+    <!-- การตั้งค่าโปรไฟล์หลัก (MAIN PROFILE SETTINGS) -->
     <div v-else class="max-w-5xl mx-auto pb-20 fade-in pt-4">
       
       <!-- บัตรข้อมูลโปรไฟล์ (Profile Card) -->
@@ -255,7 +255,7 @@ onMounted(async () => {
               </div>
            </div>
 
-           <!-- Form Inputs (2 Column Grid) -->
+           <!-- ฟิลด์ข้อมูลฟอร์ม (แบ่งเป็น 2 คอลัมน์) (Form Inputs (2 Column Grid)) -->
            <div class="grid grid-cols-1 md:grid-cols-2 gap-x-8 gap-y-6 mb-4">
                <div class="md:col-span-2 relative">
                   <label class="block text-[13px] font-bold text-slate-700 dark:text-slate-300 mb-2">{{ $t('profile.prefix') }}</label>
@@ -300,7 +300,7 @@ onMounted(async () => {
 
         </div>
         
-        <!-- Footer Buttons -->
+        <!-- ปุ่มกดยืนยันต่างๆ (Footer Buttons) -->
         <div class="px-6 sm:px-8 py-5 border-t border-slate-200 dark:border-slate-800 flex flex-col sm:flex-row justify-center sm:justify-end gap-3 items-center bg-white dark:!bg-slate-900">
            <button class="w-full sm:w-auto text-[13px] font-bold text-slate-600 dark:text-slate-400 hover:text-slate-900 dark:hover:text-white px-4 py-2 transition order-2 sm:order-1" @click="fetchUserProfile(true)">{{ $t('common.cancel') }}</button>
            <button @click="handleUpdateProfile" :disabled="isProfileSaving" class="w-full sm:w-auto bg-[#3B6BE8] hover:bg-blue-700 text-white px-6 py-2.5 rounded-lg text-[13px] font-bold transition shadow-sm disabled:opacity-50 order-1 sm:order-2">
@@ -310,7 +310,7 @@ onMounted(async () => {
         </div>
       </div>
 
-      <!-- Security Card -->
+      <!-- การ์ดความปลอดภัย (Security Card) -->
       <div class="bg-white dark:!bg-slate-900 border border-slate-200 dark:border-slate-800 rounded-2xl shadow-sm overflow-hidden">
         <div class="p-8 border-b border-slate-200 dark:border-slate-800">
           <h2 class="text-xl font-bold text-slate-900 dark:text-white">{{ $t('profile.security') }}</h2>
@@ -337,7 +337,7 @@ onMounted(async () => {
       
     </div>
 
-    <!-- Password Modal -->
+    <!-- โมดอลเปลี่ยนรหัสผ่าน (Password Modal) -->
     <q-dialog v-model="showPasswordModal">
       <q-card class="w-full max-w-md rounded-2xl p-2 dark:bg-slate-900 shadow-xl">
         <q-form @submit="handleUpdatePassword">

Frontend-Learner/pages/index.vue

@@ -22,7 +22,7 @@ const { user } = useAuth()
 const categoryCards = CATEGORY_CARDS
 const whyChooseUs = WHY_CHOOSE_US
 
-//ระดับความยาก
+// ระดับความยาก (Level)
 const levelModel = ref('ระดับทั้งหมด')
 const levelOptions = ['ระดับทั้งหมด','ระดับเริ่มต้น', 'ระดับกลาง', 'ระดับสูง']
 
@@ -59,6 +59,19 @@ const loadData = async () => {
     }
 }
 
+const getCategoryIcon = (categoryName: string) => {
+   if (!categoryName) return 'o_category'
+   const text = categoryName.toLowerCase()
+   
+   if (text.includes('ออกแบบ') || text.includes('design')) return 'o_palette'
+   if (text.includes('โปรแกรม') || text.includes('code') || text.includes('dev')) return 'o_terminal'
+   if (text.includes('ธุรกิจ') || text.includes('business') || text.includes('การตลาด') || text.includes('market')) return 'o_storefront'
+   if (text.includes('ภาษา') || text.includes('language')) return 'o_language'
+   if (text.includes('ข้อมูล') || text.includes('data')) return 'o_analytics'
+   
+   return 'o_interests'
+}
+
 const goBrowse = (slug: string) => {
     navigateTo({ path: '/browse', query: { category: slug } })
 }
@@ -95,22 +108,22 @@ onMounted(() => {
     <!-- Section 1: Hero Section -->
     <section class="container mx-auto py-24 md:py-24 lg:py-28 px-6 lg:px-12 pb-16">
       <div class="flex flex-col lg:flex-row items-center gap-10 lg:gap-10 justify-between animate-fade-in">
-        <!-- Left Content -->
+        <!-- ด้านซ้าย: ข้อความและปุ่มกด (Left Content) -->
         <div class="flex flex-col items-start gap-6 flex-1 max-w-2xl ">
-          <!-- Heading -->
+          <!-- หัวข้อหลัก (Heading) -->
           <h1 class="text-4xl sm:text-5xl lg:text-[55px] font-bold leading-tight lg:leading-[66px] slide-up" style="animation-delay: 0.2s;">
             <span class="text-slate-900">ขยายขอบเขตความรู้ของคุณ</span><br>
             <span class="text-blue-600">ด้วยการเรียนรู้ออนไลน์</span>
           </h1>
 
-          <!-- Subtitle -->
+          <!-- คำอธิบายรอง (Subtitle) -->
           <p class="text-slate-500 text-lg sm:text-xl leading-relaxed slide-up" style="animation-delay: 0.3s;">
             จุดประกายความรู้ของคุณ และเริ่มต้นอัปสกิลกับผู้เชี่ยวชาญ
             ในอุตสาหกรรมที่มีความรู้รอบด้านหลากหลายในหลายสาขา
             เรียนได้ทุกที่ ทุกเวลา
           </p>
 
-        <!-- Buttons -->
+        <!-- ปุ่มกดต่างๆ (Buttons) -->
           <div class=" w-full flex flex-col sm:flex-row items-center gap-4 pt-5 slide-up" style="animation-delay: 0.4s;">
             <q-btn 
               unelevated 
@@ -134,7 +147,7 @@ onMounted(() => {
           </div>
         </div>
 
-        <!-- Right - Hero Image -->
+        <!-- ด้านขวา: รูปภาพฮีโร่ (Right - Hero Image) -->
         <div class="flex-1 w-full max-w-lg md:max-w-md lg:max-w-xl pl-0 py-10">
           <div class="relative rounded-2xl overflow-hidden shadow-[0_25px_50px_-12px_rgba(0,0,0,0.25)] aspect-square">
             <img
@@ -144,7 +157,7 @@ onMounted(() => {
             />
             <div class="absolute inset-0 bg-gradient-to-t from-black/40 via-transparent to-transparent" />
 
-            <!-- Course Card Overlay -->
+            <!-- ส่วนทับซ้อนสำหรับทำโมเดลการ์ดคอร์ส (Course Card Overlay) -->
             <!-- <div class="absolute bottom-5 left-5 right-5">
               <div class="bg-white/85 backdrop-blur-sm border border-white/20 rounded-3xl px-6 py-5">
                 <div class="flex items-center gap-4">
@@ -170,7 +183,7 @@ onMounted(() => {
     <!-- Section 2: ทำไมต้องเลือกแพลตฟอร์มของเรา -->
     <section class="pt-20 pb-14 bg-white relative flex-col">
       <div class="container mx-auto px-6 lg:px-12">
-        <!-- Heading -->
+        <!-- หัวข้อหลัก (Heading) -->
         <div class="text-center mb-16 slide-up">
           <h2 class="text-4xl md:text-[2.4rem] font-bold text-slate-900 mb-6">
             ทำไมต้องเลือกแพลตฟอร์มของเรา?
@@ -180,7 +193,7 @@ onMounted(() => {
           </p>
         </div>
 
-        <!-- Horizontal Cards -->
+        <!-- โซนแนะนำแบบการ์ดแนวนอน (Horizontal Cards) -->
         <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8">
           <div v-for="(item, i) in whyChooseUs" :key="i"
                class="slide-up p-10 rounded-2xl bg-[#F8FAFC] border border-[#f1f2f9] hover:border-[#2463eb61] hover:bg-white transition-all duration-500 group"
@@ -203,25 +216,25 @@ onMounted(() => {
     <!-- Section 3: เลือกเรียนตามเรื่องที่คุณสนใจ -->
     <section class="py-20 md:py-24 bg-white">
       <div class="container mx-auto px-6 lg:px-12">
-        <!-- Heading -->
+        <!-- หัวข้อ (Heading) -->
         <div class="mb-12 slide-up">
           <h2 class="text-[1.4rem] text-3xl md:text-4xl font-semibold text-slate-900 px-4">
             เลือกเรียนตามเรื่องที่คุณสนใจ
           </h2>
         </div>
 
-        <!-- Horizontal Cards -->
+        <!-- โซนหมวดหมู่แบบการ์ดแนวนอน (Horizontal Cards) -->
         <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 justify-center gap-6 px-4">
           <div v-for="(card, i) in categoryCards" :key="i"
                class="cursor-pointer bg-white rounded-3xl p-6 border border-slate-200/80 shadow-[0px_1px_2px_0px_rgba(0,0,0,0.05)] hover:shadow-2xl hover:shadow-blue-600/5 hover:-translate-y-1 hover:border-[#2463eb61] transition-all duration-500 flex items-center gap-5"
                @click="goBrowse(card.slug)"
           >
-            <!-- Icon Box -->
+            <!-- กล่องไอคอน (Icon Box) -->
             <div class="flex-shrink-0 w-16 h-16 rounded-2xl flex items-center justify-center bg-slate-50 group-hover:scale-110 transition-transform duration-500">
               <q-icon :name="card.icon" size="35px" class="text-blue-600" />
             </div>
 
-            <!-- Content -->
+            <!-- เนื้อหาข้อความ (Content) -->
             <div class="flex-grow pr-2">
               <h3 class="text-lg md:text-xl font-bold text-slate-900 mb-1 group-hover:text-blue-600 transition-colors leading-tight">
                 {{ card.title }}
@@ -231,7 +244,7 @@ onMounted(() => {
               </p>
             </div>
 
-            <!-- Arrow -->
+            <!-- ลูกศรชี้ขวา (Arrow) -->
             <div class="gt-xs flex-shrink-0 text-slate-300 group-hover:text-blue-600 transition-colors transform group-hover:translate-x-1 duration-300">
               <q-icon name="chevron_right" size="24px" />
             </div>
@@ -243,7 +256,7 @@ onMounted(() => {
     <!-- Section 4: "คอร์สออนไลน์" -->
     <section class="py-12 md:py-24 bg-slate-50">
       <div class="container mx-auto px-6 lg:px-12">
-        <!-- Heading -->
+        <!-- หัวข้อหลักและลิงก์เพิ่มเติม (Heading) -->
         <div class="flex flex-col md:flex-row items-start md:items-end justify-between mb-5 gap-8">
           <div class="slide-up">
             <h2 class="text-4xl md:text-[2.4rem] font-bold text-slate-900 mb-4">คอร์สออนไลน์</h2>
@@ -254,9 +267,9 @@ onMounted(() => {
           </NuxtLink>
         </div>
 
-        <!-- Filters Row -->
+        <!-- แถวตัวกรองคอร์ส (Filters Row) -->
         <div class="flex items-center gap-2 mb-8 overflow-x-auto no-scrollbar slide-up justify-between">
-          <!-- Category Filters -->
+          <!-- ตัวกรองหมวดหมู่คอร์ส (Category Filters) -->
           <div class="flex items-center gap-2">
             <button 
               class="py-2 px-5 rounded-full font-medium text-lg transition-all whitespace-nowrap border-2"
@@ -274,7 +287,7 @@ onMounted(() => {
               :class="selectedCategory === category.slug ? 'bg-blue-600 text-white border-blue-600 font-semibold' : 'bg-white border-slate-200 text-slate-700 hover:border-slate-300'"
               @click="selectedCategory = category.slug"
             >
-              <q-icon :name="category.icon || 'o_label'" size="20px" class="mr-1" />
+              <q-icon :name="getCategoryIcon(getLocalizedText(category.name))" size="20px" class="mr-1" />
               {{ getLocalizedText(category.name) }}
             </button>
           </div>
@@ -296,7 +309,7 @@ onMounted(() => {
           </div> -->
         </div>
 
-        <!-- Courses Carousel -->
+        <!-- ระบบเลื่อนสไลด์ดูคอร์ส (Courses Carousel) -->
         <div v-if="isLoading" class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6">
           <div v-for="i in 4" :key="i" class="bg-white rounded-2xl h-[450px] animate-pulse" />
         </div>
@@ -326,7 +339,7 @@ onMounted(() => {
                   class="flex flex-col flex-1 min-w-0 rounded-2xl border border-slate-100 bg-white shadow-sm overflow-hidden hover:shadow-lg hover:-translate-y-1 transition-all duration-300 cursor-pointer"
                   @click="navigateTo(`/course/${course.id}`)"
                 >
-                  <!-- Image-->
+                  <!-- รูปภาพหน้าปกคอร์ส (Image) -->
                   <div class="relative flex-shrink-0">
                     <img
                       v-if="course.thumbnail_url"
@@ -339,23 +352,23 @@ onMounted(() => {
                     </div>
                   </div>
 
-                  <!-- Content -->
+                  <!-- เนื้อหาของคอร์ส (Content) -->
                   <div class="flex flex-col flex-1 p-6">
 
 
-                    <!-- Title -->
+                    <!-- ชื่อคอร์ส (Title) -->
                     <h3 class="text-[#0F172A] font-semibold text-lg leading-snug mb-2 line-clamp-2">
                       {{ getLocalizedText(course.title) }}
                     </h3>
 
-                    <!-- Description -->
+                    <!-- รายละเอียดแบบย่อ (Description) -->
                     <p class="text-slate-500 text-sm leading-relaxed mb-4 flex-1 line-clamp-2">
                       {{ getLocalizedText(course.description) }}
                     </p>
 
 
 
-                   <!-- Price + Button -->
+                   <!-- ส่วนแถบราคาและปุ่มกด (Price + Button) -->
                     <div class="flex items-center justify-between pt-6 border-t border-slate-100 gap-2">
                         <div class="flex flex-col">
                             <span v-if="course.price > 0" class="text-[#0F172A] font-bold text-xl">
@@ -378,7 +391,7 @@ onMounted(() => {
             </q-carousel-slide>
           </q-carousel>
 
-           <!-- Custom Carousel Navigation -->
+           <!-- ระบบนำทางสไลด์แบบกำหนดเอง (Custom Carousel Navigation) -->
             <button 
               v-if="courseChunks.length > 1"
               class="absolute -left-4 md:-left-12 top-1/2 -translate-y-1/2 z-10 w-12 h-12 rounded-full bg-white shadow-xl border border-slate-100 flex items-center justify-center text-slate-500 hover:text-blue-600 transition-all hover:scale-110"

Frontend-Learner/pages/quiz/[id].vue

@@ -2,7 +2,7 @@
   <div class="min-h-screen bg-gray-50 p-4 md:p-8">
     <div class="max-w-4xl mx-auto">
       
-      <!-- Header / Title -->
+      <!-- ส่วนหัว / ชื่อเรื่อง (Header / Title) -->
       <div class="mb-6 flex items-center justify-between">
         <div>
           <h1 class="text-2xl font-bold text-gray-800">Quiz Runner</h1>
@@ -16,7 +16,7 @@
 
       <div class="grid grid-cols-1 lg:grid-cols-12 gap-6">
         
-        <!-- Sidebar: Question Navigator -->
+        <!-- แถบด้านข้าง: ตัวนำทางคำถาม (Sidebar: Question Navigator) -->
         <div class="lg:col-span-3 order-2 lg:order-1">
           <QCard class="bg-white shadow-sm sticky top-4">
             <QCardSection>
@@ -33,7 +33,7 @@
                 </button>
               </div>
               
-              <!-- Legend -->
+              <!-- คำอธิบายสัญลักษณ์ (Legend) -->
               <div class="mt-6 space-y-2 text-xs text-gray-600">
                 <div class="flex items-center gap-2"><div class="w-3 h-3 rounded-full bg-blue-500"></div> Current</div>
                 <div class="flex items-center gap-2"><div class="w-3 h-3 rounded-full bg-green-500"></div> Completed</div>
@@ -44,11 +44,11 @@
           </QCard>
         </div>
 
-        <!-- Main Content: Question -->
+        <!-- เนื้อหาหลัก: คำถาม (Main Content: Question) -->
         <div class="lg:col-span-9 order-1 lg:order-2">
           <QCard v-if="store.currentQuestion" class="bg-white shadow-md min-h-[400px] flex flex-col">
             
-            <!-- Question Header -->
+            <!-- ส่วนหัวคำถาม (Question Header) -->
             <QCardSection class="bg-gray-50 border-b border-gray-100 py-4">
               <div class="flex justify-between items-start">
                 <div>
@@ -57,18 +57,18 @@
                   </QBadge>
                   <h2 class="text-xl font-medium text-gray-800">
                     <span class="text-gray-400 mr-2">{{ store.currentQuestionIndex + 1 }}.</span>
-                    {{ store.currentQuestion.title }}
+                    {{ getLocalizedString(store.currentQuestion.question) }}
                   </h2>
                 </div>
               </div>
             </QCardSection>
 
-            <!-- Question Body -->
+            <!-- ส่วนเนื้อหาคำถาม (Question Body) -->
             <QCardSection class="flex-grow py-8 px-6">
               
-              <!-- Single Choice -->
+              <!-- เลือกคำตอบเดียว (Single Choice) -->
               <div v-if="store.currentQuestion.type === 'single'">
-                <div v-for="opt in store.currentQuestion.options" :key="opt.id" 
+                <div v-for="opt in store.currentQuestion.choices" :key="opt.id" 
                      class="mb-3 p-3 border rounded-lg hover:bg-blue-50 cursor-pointer transition-colors"
                      :class="{ 'border-blue-500 bg-blue-50': currentVal === opt.id, 'border-gray-200': currentVal !== opt.id }"
                      @click="handleInput(opt.id)">
@@ -77,14 +77,14 @@
                          :class="{ 'border-blue-500': currentVal === opt.id, 'border-gray-300': currentVal !== opt.id }">
                       <div v-if="currentVal === opt.id" class="w-2.5 h-2.5 rounded-full bg-blue-500"></div>
                     </div>
-                    <span class="text-gray-700">{{ opt.label }}</span>
+                    <span class="text-gray-700">{{ getLocalizedString(opt.text) }}</span>
                   </div>
                 </div>
               </div>
 
-              <!-- Multiple Choice -->
+              <!-- เลือกหลายคำตอบ (Multiple Choice) -->
               <div v-else-if="store.currentQuestion.type === 'multiple'">
-                <div v-for="opt in store.currentQuestion.options" :key="opt.id" 
+                <div v-for="opt in store.currentQuestion.choices" :key="opt.id" 
                      class="mb-3 p-3 border rounded-lg hover:bg-blue-50 cursor-pointer transition-colors"
                      :class="{ 'border-blue-500 bg-blue-50': isSelected(opt.id), 'border-gray-200': !isSelected(opt.id) }"
                      @click="toggleSelection(opt.id)">
@@ -93,12 +93,12 @@
                          :class="{ 'border-blue-500 bg-blue-500': isSelected(opt.id), 'border-gray-300': !isSelected(opt.id) }">
                       <QIcon v-if="isSelected(opt.id)" name="check" class="text-white text-xs" />
                     </div>
-                    <span class="text-gray-700">{{ opt.label }}</span>
+                    <span class="text-gray-700">{{ getLocalizedString(opt.text) }}</span>
                   </div>
                 </div>
               </div>
 
-              <!-- Text Input -->
+              <!-- พิมพ์ข้อความ (Text Input) -->
               <div v-else-if="store.currentQuestion.type === 'text'">
                 <QInput
                   v-model="textModel"
@@ -113,7 +113,7 @@
 
             </QCardSection>
 
-            <!-- Error Banner -->
+            <!-- แบนเนอร์แสดงข้อผิดพลาด (Error Banner) -->
             <QBanner v-if="store.lastError" class="bg-red-50 text-red-600 px-6 py-2 border-t border-red-100">
               <template v-slot:avatar>
                 <QIcon name="warning" color="red" />
@@ -121,7 +121,7 @@
               {{ store.lastError }}
             </QBanner>
 
-            <!-- Actions Footer -->
+            <!-- ส่วนท้ายปุ่มกดต่างๆ (Actions Footer) -->
             <QCardSection class="border-t border-gray-100 bg-gray-50 p-4 flex flex-wrap gap-4 items-center justify-between">
               
               <QBtn
@@ -140,7 +140,7 @@
                   flat
                   color="orange-8"
                   label="Skip for now"
-                  @click="store.skipQuestion()"
+                  @click="store.nextQuestion()"
                   no-caps
                 />
 
@@ -178,11 +178,11 @@
 <script setup lang="ts">
 import { computed, ref, onMounted, watch, reactive } from 'vue';
 import { useRoute } from 'vue-router';
-// Composable is auto-imported in Nuxt
+// คอมโพสิเบิลถูกนำเข้าอัตโนมัติใน Nuxt (Composable is auto-imported in Nuxt)
 // import { useQuizRunner } from '@/composables/useQuizRunner'; 
 
 const route = useRoute();
-// Wrap in reactive to unwrap refs, mimicking Pinia store behavior for template
+// ห่อหุ้มใน reactive เพื่อแกะค่า refs ทำให้เหมือนพฤติกรรม Pinia store สำหรับ template (Wrap in reactive to unwrap refs, mimicking Pinia store behavior for template)
 const store = reactive(useQuizRunner());
 
 onMounted(() => {
@@ -190,7 +190,16 @@ onMounted(() => {
   store.initQuiz(quizId);
 });
 
-// -- Helpers for Input Handling --
+// -- ตัวช่วยสำหรับการจัดการการป้อนข้อมูล (Helpers for Input Handling) --
+
+// ฟังก์ชันช่วยเหลือสำหรับแปลภาษา (Helper to safely format text)
+const getLocalizedString = (val: any): string => {
+  if (typeof val === 'string') return val;
+  if (val && typeof val === 'object') {
+    return val.th || val.en || String(val);
+  }
+  return String(val || '');
+}
 
 const currentVal = computed(() => {
   return store.currentAnswer?.value;
@@ -200,23 +209,23 @@ const isSaved = computed(() => {
   return store.currentAnswer?.is_saved;
 });
 
-// Single Choice
+// เลือกคำตอบเดียว (Single Choice)
-function handleInput(val: string) {
+function handleInput(val: number) {
   store.updateAnswer(val);
 }
 
-// Text Choice
+// พิมพ์ข้อความ (Text Choice)
 const textModel = ref('');
-// Watch for question changes to reset text model
+// จับตาดูการเปลี่ยนแปลงคำถามเพื่อล้างค่า (Watch for question changes to reset text model)
 watch(
   () => store.currentQuestionIndex,
   () => {
     if (store.currentQuestion?.type === 'text') {
        textModel.value = (store.currentAnswer?.value as string) || '';
     }
-    // Clear error when changing question
+    // ล้างข้อผิดพลาดเมื่อเปลี่ยนคำถาม (Clear error when changing question)
     store.lastError = null;
-    // Scroll to top
+    // เลื่อนหน้าจอขึ้นบนสุด (Scroll to top)
     if (typeof window !== 'undefined') {
        window.scrollTo({ top: 0, behavior: 'smooth' });
     }
@@ -224,7 +233,7 @@ watch(
   { immediate: true }
 );
 
-// Watch for error to scroll to error/field
+// จับตาดูข้อผิดพลาดเพื่อเลื่อนหน้าจอไปยังฟิลด์นั้น (Watch for error to scroll to error/field)
 watch(
   () => store.lastError,
   (newVal) => {
@@ -245,8 +254,8 @@ function handleTextInput(val: string | number | null) {
   store.updateAnswer(val as string);
 }
 
-// Multiple Choice
+// เลือกหลายคำตอบ (Multiple Choice)
-function isSelected(id: string) {
+function isSelected(id: number) {
   const val = store.currentAnswer?.value;
   if (Array.isArray(val)) {
     return val.includes(id);
@@ -254,9 +263,9 @@ function isSelected(id: string) {
   return false;
 }
 
-function toggleSelection(id: string) {
+function toggleSelection(id: number) {
   const val = store.currentAnswer?.value;
-  let currentArr: string[] = [];
+  let currentArr: number[] = [];
   if (Array.isArray(val)) {
     currentArr = [...val];
   }
@@ -270,10 +279,10 @@ function toggleSelection(id: string) {
   store.updateAnswer(currentArr);
 }
 
-// -- Helpers for Styling --
+// -- ตัวช่วยสำหรับการจัดแต่งทรง (Helpers for Styling) --
 
 function getIndicatorClass(index: number, qId: number) {
-  // 1. Current = Blue
+  // 1. ปัจจุบัน = สีน้ำเงิน (Current = Blue)
   if (index === store.currentQuestionIndex) {
     return 'bg-blue-500 text-white border-blue-600';
   }
@@ -286,7 +295,8 @@ function getIndicatorClass(index: number, qId: number) {
     case 'skipped':
       return 'bg-orange-500 text-white border-orange-600';
     case 'in_progress':
-      // If it's in_progress but NOT current (should be rare/impossible with strict logic, but handled)
+      // กรณีที่เป็น in_progress แต่ไม่ใช่คำถามปัจจุบัน (จริงๆ เกิดยากตามตรรกะที่เข้มงวด แต่เผื่อไว้ก่อน) 
+      // (If it's in_progress but NOT current (should be rare/impossible with strict logic, but handled))
       return 'bg-blue-200 text-blue-800 border-blue-300'; 
     case 'not_started':
     default:
@@ -297,5 +307,5 @@ function getIndicatorClass(index: number, qId: number) {
 </script>
 
 <style scoped>
-/* Optional: Transitions */
+/* ส่วนเสริม: ทรานสิชั่น (Optional: Transitions) */
 </style>

Frontend-Learner/pages/reset-password.vue

@@ -1,8 +1,8 @@
 <script setup lang="ts">
 /**
  * @file reset-password.vue
- * @description Reset Password Page.
+ * @description หน้าตั้งรหัสผ่านใหม่ (Reset Password Page.
- * Allows user to set a new password after verifying their email link (simulated).
+ * อนุญาตให้ผู้ใช้ตั้งรหัสผ่านใหม่หลังจากยืนยันลิงก์อีเมล)
  */
 
 definePageMeta({
@@ -44,9 +44,9 @@ const handlePasswordInput = (field: keyof typeof resetForm, val: string) => {
   resetForm[field] = val
   if (/[\u0E00-\u0E7F]/.test(val)) {
     if (field === 'password') errors.value.password = 'ห้ามใส่ภาษาไทย'
-    // We don't necessarily need to flag confirmPassword individually if it just needs to match, but let's be consistent if we want
+    // ไม่จำเป็นต้องแจ้งเตือน confirmPassword แยกต่างหากถ้ามันแค่ต้องตรงกัน แต่เพื่อให้สอดคล้องกันเราก็ควรทำ (We don't necessarily need to flag confirmPassword individually if it just needs to match, but let's be consistent if we want)
   } else {
-    // Clear error if it was "Thai characters"
+    // ลบข้อผิดพลาดถ้าเป็น "ห้ามใส่ภาษาไทย" (Clear error if it was "Thai characters")
     if (field === 'password' && errors.value.password === 'ห้ามใส่ภาษาไทย') {
       clearFieldError('password')
     }
@@ -63,7 +63,7 @@ onMounted(() => {
 const resetPassword = async () => {
   if (!validate(resetForm, resetRules)) return
   
-  // Extract token from query
+  // ดึงโทเคนจาก URL query (Extract token from query)
   const token = route.query.token as string
 
   if (!token) {
@@ -92,7 +92,7 @@ const resetPassword = async () => {
 <template>
   <div class="relative min-h-screen w-full flex items-center justify-center p-4 overflow-hidden bg-slate-50 transition-colors">
     <!-- ==========================================
-          BACKGROUND EFFECTS (Light Mode Only)
+          เอฟเฟกต์พื้นหลัง (แสดงเฉพาะโหมดสว่าง) (BACKGROUND EFFECTS (Light Mode Only))
      ========================================== -->
     <div class="fixed inset-0 overflow-hidden pointer-events-none -z-10">
        <div class="absolute inset-0 bg-gradient-to-br from-white via-slate-50 to-blue-50/50"></div>
@@ -101,11 +101,11 @@ const resetPassword = async () => {
     </div>
 
     <!-- ==========================================
-          RESET PASSWORD CARD
+          การ์ดตั้งรหัสผ่านใหม่ (RESET PASSWORD CARD)
      ========================================== -->
     <div class="w-full max-w-[460px] relative z-10 slide-up">
       
-       <!-- Header / Logo -->
+       <!-- หัวข้อ / โลโก้ (Header / Logo) -->
        <div class="text-center mb-8">
           <div class="inline-flex items-center justify-center w-14 h-14 rounded-2xl bg-gradient-to-tr from-blue-600 to-indigo-600 text-white shadow-lg shadow-blue-600/20 mb-6">
              <span class="font-black text-2xl">E</span>
@@ -116,10 +116,10 @@ const resetPassword = async () => {
 
       <div class="bg-white rounded-[2rem] p-8 md:p-10 shadow-xl shadow-slate-200/50 border border-slate-100 relative overflow-hidden">
         
-        <!-- Form -->
+        <!-- ฟอร์ม (Form) -->
         <form @submit.prevent="resetPassword" class="flex flex-col gap-6">
           
-          <!-- New Password -->
+          <!-- รหัสผ่านใหม่ (New Password) -->
           <div>
             <label class="block text-sm font-semibold text-slate-700 mb-2 ml-1">รหัสผ่านใหม่ <span class="text-red-500">*</span></label>
             <div class="relative group">
@@ -145,7 +145,7 @@ const resetPassword = async () => {
             <span v-if="errors.password" class="text-xs text-red-500 font-medium ml-1 mt-1 block slide-up-sm">{{ errors.password }}</span>
           </div>
 
-          <!-- Confirm Password -->
+          <!-- ยืนยันรหัสผ่านใหม่ (Confirm Password) -->
           <div>
             <label class="block text-sm font-semibold text-slate-700 mb-2 ml-1">ยืนยันรหัสผ่านใหม่ <span class="text-red-500">*</span></label>
             <div class="relative group">
@@ -171,7 +171,7 @@ const resetPassword = async () => {
             <span v-if="errors.confirmPassword" class="text-xs text-red-500 font-medium ml-1 mt-1 block slide-up-sm">{{ errors.confirmPassword }}</span>
           </div>
 
-          <!-- Submit Button -->
+          <!-- ปุ่มยืนยัน (Submit Button) -->
           <button 
             type="submit" 
             :disabled="isLoading"
@@ -183,7 +183,7 @@ const resetPassword = async () => {
         </form>
       </div>
 
-      <!-- Back Link -->
+      <!-- ลิงก์ย้อนกลับ (Back Link) -->
        <div class="mt-8 text-center text-slate-500">
            <NuxtLink to="/auth/login" class="inline-flex items-center gap-2 text-sm font-medium hover:text-slate-800 transition-colors group px-4 py-2 rounded-lg hover:bg-white/50">
              <span class="group-hover:-translate-x-1 transition-transform">←</span> กลับไปหน้าเข้าสู่ระบบ

Frontend-Learner/pages/verify-email.vue

@@ -1,8 +1,8 @@
 <script setup lang="ts">
 /**
  * @file verify-email.vue
- * @description Page for handling email verification process.
+ * @description หน้าสำหรับกระบวนการยืนยันอีเมล (Page for handling email verification process.
- * Displays loading state while processing token, then shows success or error message.
+ * แสดงสถานะกำลังโหลดระหว่างประมวลผลโทเคน จากนั้นแสดงข้อความสำเร็จหรือข้อผิดพลาด)
  */
 
 definePageMeta({
@@ -28,7 +28,7 @@ onMounted(async () => {
         return
     }
 
-    // Call verify API
+    // เรียกใช้ API เพื่อยืนยัน (Call verify API)
     const result = await verifyEmail(token)
     
     isLoading.value = false
@@ -39,7 +39,7 @@ onMounted(async () => {
         isSuccess.value = false
         if (result.code === 400) {
              errorMessage.value = t('profile.emailAlreadyVerified')
-             // If already verified, show success state with specific message
+             // หากยืนยันแล้วให้แสดงสถานะสำเร็จพร้อมด้วยข้อความเฉพาะ (If already verified, show success state with specific message)
              isSuccess.value = true 
         } else if (result.code === 401) {
             errorMessage.value = t('auth.tokenExpired')
@@ -58,7 +58,7 @@ const navigateToHome = () => {
   <div class="min-h-screen flex items-center justify-center py-12 px-4 sm:px-6 lg:px-8 bg-slate-50 dark:bg-[#0f172a]">
     <div class="auth-card max-w-md w-full space-y-8 p-8 rounded-2xl text-center">
       
-      <!-- Loading State -->
+      <!-- สถานะกำลังโหลด (Loading State) -->
       <div v-if="isLoading" class="flex flex-col items-center justify-center py-8">
         <q-spinner-dots size="4rem" color="primary" />
         <h2 class="mt-6 text-xl font-bold text-slate-900 dark:text-white animate-pulse">
@@ -66,7 +66,7 @@ const navigateToHome = () => {
         </h2>
       </div>
 
-      <!-- Success State -->
+      <!-- สถานะสำเร็จ (Success State) -->
       <div v-else-if="isSuccess" class="flex flex-col items-center animate-bounce-in">
         <div class="w-24 h-24 rounded-full bg-green-500 flex items-center justify-center mb-10 shadow-lg shadow-green-500/20">
            <q-icon name="check" class="text-5xl text-white font-black" />
@@ -89,7 +89,7 @@ const navigateToHome = () => {
         />
       </div>
 
-      <!-- Error State -->
+      <!-- สถานะข้อผิดพลาด (Error State) -->
       <div v-else class="flex flex-col items-center animate-shake">
          <div class="w-24 h-24 rounded-full bg-red-100 dark:bg-red-900/30 flex items-center justify-center mb-6">
            <q-icon name="error" class="text-6xl text-red-500" />
@@ -126,11 +126,15 @@ const navigateToHome = () => {
 }
 
 .auth-card {
-  @apply bg-white border-slate-100 shadow-xl;
+  background-color: white;
+  border-color: #f1f5f9;
+  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
   border-width: 1px;
 }
-.dark .auth-card {
+:global(.dark) .auth-card {
-  @apply bg-[#1e293b] border-white/5 shadow-none;
+  background-color: #1e293b;
+  border-color: rgba(255, 255, 255, 0.05);
+  box-shadow: none;
 }
 
 @keyframes bounceIn {

Frontend-Learner/playwright.config.ts

@@ -0,0 +1,57 @@
+import { defineConfig, devices } from '@playwright/test';
+
+/**
+ * @file playwright.config.ts
+ * @description ไฟล์ตั้งค่าสำหรับการทำ Automated E2E Testing ด้วย Playwright
+ */
+export default defineConfig({
+  // โฟลเดอร์ที่เก็บไฟล์เทส (ชี้ไปที่โฟลเดอร์ปลายทางที่เราสร้าง)
+  testDir: './tests/e2e',
+  
+  // รันเทสแบบขนาน (พร้อมๆ กันหลายไฟล์) เพื่อให้เสร็จเร็วขึ้น
+  fullyParallel: true,
+  
+  // หากการรันเทสบน CI/CD ล้มเหลว ให้ลองรันซ้ำ 2 ครั้ง
+  retries: process.env.CI ? 2 : 0,
+  
+  // จำนวน Worker ที่ใช้รันเทส
+  workers: process.env.CI ? 1 : undefined,
+  
+  // รูปแบบการแสดงผลลัพธ์ (Reporter)
+  reporter: 'html',
+
+  use: {
+    // กำหนดล่วงหน้าว่าเว็บที่เรากำลังจะพุ่งไปหาคือ URL อะไร (พอร์ต 3000 ของ Nuxt)
+    baseURL: 'http://localhost:3000',
+    
+    // ตั้งค่าให้เก็บประวัติแบบติดตามผล (Trace) ถ้าระบบพัง จะได้กลับมาดูได้
+    trace: 'on-first-retry',
+    
+    // ตั้งค่าเก็บรูปภาพหน้าจอเมื่อพัง (Screenshot on failure)
+    screenshot: 'only-on-failure'
+  },
+
+  // ตั้งค่าอุปกรณ์ที่ใช้ทดสอบ (Browsers)
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+    // หากต้องการเทสบน Firefox หรือ Safari สามารถเปิดคอมเมนต์บรรทัดถัดไปได้เลย
+    // {
+    //   name: 'firefox',
+    //   use: { ...devices['Desktop Firefox'] },
+    // },
+    // {
+    //   name: 'webkit',
+    //   use: { ...devices['Desktop Safari'] },
+    // },
+  ],
+
+  // (Optional) หากต้องการให้เปิด Local Server อัตโนมัติก่อนรันเทส สามารถเอาคอมเมนต์ออกได้
+  // webServer: {
+  //   command: 'npm run dev',
+  //   url: 'http://localhost:3000',
+  //   reuseExistingServer: !process.env.CI,
+  // },
+});