feat: Implement initial e-learning platform frontend structure including dashboard, course management, authentication, and common UI components.

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'