feat: add classroom learning interface with video playback, progress tracking, and a dedicated quiz page.

Frontend-Learner/pages/classroom/learning.vue

@@ -133,15 +133,23 @@ const resetAndNavigate = (path: string) => {
   }
 }
 
-// Logic loadLesson แยกออกมา
+// Logic loadLesson ให้ลื่นไหลแบบ SPA
 const handleLessonSelect = (lessonId: number) => {
   if (currentLesson.value?.id === lessonId) return
-  const url = new URL(window.location.href)
-  url.searchParams.set('lesson_id', lessonId.toString())
-  resetAndNavigate(url.toString())
+  
+  // 1. เปลี่ยน URL แบบนุ่มนวล
+  router.push({ query: { ...route.query, lesson_id: lessonId.toString() } })
+  
+  // 2. โหลดเนื้อหาใหม่โดยไม่ Refresh หน้า
+  loadLesson(lessonId)
+  
+  // ปิด Sidebar บนมือถือเมื่อเลือกบทเรียน
+  if (sidebarOpen.value) {
+    sidebarOpen.value = false
+  }
 }
 
-// Logic สำหรับการกดย้อนกลับหรืออกจากหน้าเรียน
+// Logic สำหรับการกดย้อนกลับหรือออกจากหน้าเรียน (ใช้ Hard Reload ตามเดิม)
 const handleExit = (path: string) => {
   resetAndNavigate(path)
 }
@@ -155,24 +163,25 @@ const handleExit = (path: string) => {
 const loadCourseData = async () => {
   if (!courseId.value) return
   isLoading.value = true
-  // Reset states before loading new course
-  courseData.value = null
-  currentLesson.value = null
-  announcements.value = []
   
   try {
     const res = await fetchCourseLearningInfo(courseId.value)
     if (res.success) {
       courseData.value = res.data
       
-      // Auto-load logic: ถ้ายังไม่ได้เลือกบทเรียน ให้โหลดบทแรกที่ไม่ล็อคมาแสดง
-      if (!currentLesson.value) {
-        const firstChapter = res.data.chapters[0]
-        if (firstChapter && firstChapter.lessons.length > 0) {
-            // Find first unlocked or just first
-            const availableLesson = firstChapter.lessons.find((l: any) => !l.is_locked) || firstChapter.lessons[0]
-            loadLesson(availableLesson.id)
-        }
+      // Auto-load logic: เช็คจาก URL ก่อน ถ้าไม่มีค่อยหาบทแรก
+      const urlLessonId = route.query.lesson_id ? Number(route.query.lesson_id) : null
+      
+      if (urlLessonId) {
+          // ถ้ามีใน URL ให้โหลดบทนั้นเลย
+          loadLesson(urlLessonId)
+      } else if (!currentLesson.value) {
+          // ถ้าไม่มีใน URL ให้หาบทแรกที่ไม่ล็อค
+          const firstChapter = res.data.chapters[0]
+          if (firstChapter && firstChapter.lessons.length > 0) {
+              const availableLesson = firstChapter.lessons.find((l: any) => !l.is_locked) || firstChapter.lessons[0]
+              loadLesson(availableLesson.id)
+          }
       }
 
       // Fetch Announcements
@@ -507,7 +516,7 @@ onBeforeUnmount(() => {
     <!-- Header -->
     <q-header bordered class="bg-[var(--bg-surface)] border-b border-gray-200 dark:border-white/5 text-[var(--text-main)] h-14">
       <q-toolbar>
-        <q-btn flat round dense icon="menu" class="lg:hidden mr-2 text-slate-900 dark:text-white" @click="toggleSidebar" />
+        <q-btn flat round dense icon="menu" class="mr-2 text-slate-900 dark:text-white hover:bg-slate-100 dark:hover:bg-slate-800 transition-colors" @click="toggleSidebar" />
         
         <!-- Back Button & Branding -->
         <div class="flex items-center gap-2 mr-6">
@@ -597,16 +606,20 @@ 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) -->
-                <div v-if="currentLesson.type === 'QUIZ'" class="p-8 bg-gradient-to-br from-blue-50 to-indigo-50 dark:from-slate-800 dark:to-slate-800/50 rounded-2xl border border-blue-100 dark:border-white/5 text-center">
-                    <div class="bg-white dark:bg-slate-700 w-20 h-20 rounded-full flex items-center justify-center mx-auto mb-4 shadow-sm text-blue-500 dark:text-blue-300">
+                <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" />
                     </div>
                     <h2 class="text-xl font-bold mb-2 text-slate-900 dark:text-white">{{ $t('quiz.startTitle', 'แบบทดสอบท้ายบทเรียน') }}</h2>
                     <p class="text-slate-500 dark:text-slate-400 mb-6 max-w-md mx-auto">{{ getLocalizedText(currentLesson.quiz?.description || currentLesson.description) }}</p>
                     
-                    <div class="flex justify-center flex-wrap gap-3 text-sm text-slate-600 dark:text-slate-300 mb-8">
-                         <span v-if="currentLesson.quiz?.questions?.length" class="px-3 py-1 bg-white dark:bg-slate-900 rounded-full border border-gray-200 dark:border-white/10 shadow-sm flex items-center gap-1.5"><q-icon name="format_list_numbered" size="14px" class="text-blue-500" /> {{ currentLesson.quiz.questions.length }} ข้อ</span>
-                         <span v-if="currentLesson.quiz?.time_limit" class="px-3 py-1 bg-white dark:bg-slate-900 rounded-full border border-gray-200 dark:border-white/10 shadow-sm flex items-center gap-1.5"><q-icon name="schedule" size="14px" class="text-orange-500" /> {{ currentLesson.quiz.time_limit }} นาที</span>
+                    <div class="flex justify-center flex-wrap gap-3 text-sm mb-8">
+                         <span v-if="currentLesson.quiz?.questions?.length" class="px-3 py-1 bg-white dark:bg-white rounded-full border border-gray-200 dark:border-white/10 shadow-sm flex items-center gap-1.5 text-slate-900 font-bold">
+                            <q-icon name="format_list_numbered" size="14px" class="text-blue-600" /> {{ currentLesson.quiz.questions.length }} ข้อ
+                         </span>
+                         <span v-if="currentLesson.quiz?.time_limit" class="px-3 py-1 bg-white dark:bg-white rounded-full border border-gray-200 dark:border-white/10 shadow-sm flex items-center gap-1.5 text-slate-900 font-bold">
+                            <q-icon name="schedule" size="14px" class="text-orange-600" /> {{ currentLesson.quiz.time_limit }} นาที
+                         </span>
                     </div>
 
                     <q-btn 

Frontend-Learner/pages/classroom/quiz.vue

@@ -65,7 +65,7 @@ const getQuestionStatusClass = (index: number, questionId: number) => {
     }
 
     // 4. Not Started = Grey
-    return 'bg-slate-200 text-slate-400 border-slate-300 dark:bg-white/5 dark:border-white/10 dark:text-slate-500 hover:bg-slate-300 dark:hover:bg-white/10'
+    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) => {
@@ -377,7 +377,7 @@ const getCorrectChoiceId = (questionId: number) => {
                
                <div class="flex justify-center mb-10">
                  <div class="w-20 h-20 rounded-3xl bg-blue-50 dark:bg-blue-500/10 border border-blue-100 dark:border-blue-500/20 flex items-center justify-center shadow-inner">
-                    <q-icon name="quiz" size="2rem" color="primary" />
+                    <q-icon name="quiz" size="2.5rem" color="primary" class="dark:text-blue-400" />
                  </div>
                </div>
 
@@ -466,25 +466,7 @@ const getCorrectChoiceId = (questionId: number) => {
                      </button>
                  </div>
 
-                 <div class="mb-8 px-2">
-                     <div class="text-xs font-bold text-slate-400 uppercase tracking-widest mb-3">
-                        {{ $t('quiz.statusLabel', 'สถานะข้อสอบ') }}
-                     </div>
-                     <div class="flex flex-wrap items-center gap-4">
-                        <div class="flex items-center gap-2 text-sm font-medium text-slate-500 dark:text-slate-400">
-                            <div class="w-2.5 h-2.5 rounded-full bg-blue-500 ring-2 ring-blue-100 dark:ring-blue-900/30"></div> {{ $t('quiz.statusCurrent', 'Current') }}
-                        </div>
-                        <div class="flex items-center gap-2 text-sm font-medium text-slate-500 dark:text-slate-400">
-                            <div class="w-2.5 h-2.5 rounded-full bg-emerald-500"></div> {{ $t('quiz.statusCompleted', 'Completed') }}
-                        </div>
-                        <div class="flex items-center gap-2 text-sm font-medium text-slate-500 dark:text-slate-400">
-                            <div class="w-2.5 h-2.5 rounded-full bg-orange-500"></div> {{ $t('quiz.statusSkipped', 'Skipped') }}
-                        </div>
-                        <div class="flex items-center gap-2 text-sm font-medium text-slate-500 dark:text-slate-400">
-                            <div class="w-2.5 h-2.5 rounded-full bg-slate-200 dark:bg-slate-700"></div> {{ $t('quiz.statusNotStarted', 'Not Started') }}
-                        </div>
-                     </div>
-                 </div>
+
 
                  <!-- Controls -->
                  <div class="flex justify-between items-center pt-8 border-t border-slate-100 dark:border-white/5">
@@ -602,7 +584,7 @@ const getCorrectChoiceId = (questionId: number) => {
                                   :class="{
                                       'border-emerald-500 bg-emerald-50 dark:bg-emerald-500/10': choice.id === getCorrectChoiceId(question.id),
                                       'border-red-500 bg-red-50 dark:bg-red-500/10': userAnswers[question.id] === choice.id && choice.id !== getCorrectChoiceId(question.id),
-                                      'border-slate-100 dark:border-white/5 opacity-60': userAnswers[question.id] !== choice.id && choice.id !== getCorrectChoiceId(question.id)
+                                      'border-slate-100 dark:border-white/5 opacity-80 dark:opacity-40': userAnswers[question.id] !== choice.id && choice.id !== getCorrectChoiceId(question.id)
                                   }"
                                 >
                                     <!-- Indicator Icon -->