feat: Implement course discovery page with browsing, filtering, and detail view, powered by a new useCourse composable.

Frontend-Learner/composables/useCourse.ts

@@ -88,9 +88,34 @@ export const useCourse = () => {
         }
     }
 
+    const enrollCourse = async (courseId: number) => {
+        try {
+            const data = await $fetch<{ code: number; message: string; data: any }>(`${API_BASE_URL}/students/courses/${courseId}/enroll`, {
+                method: 'POST',
+                headers: token.value ? {
+                    Authorization: `Bearer ${token.value}`
+                } : {}
+            })
+
+            return {
+                success: true,
+                data: data.data,
+                message: data.message
+            }
+        } catch (err: any) {
+            console.error('Enroll course failed:', err)
+            return {
+                success: false,
+                error: err.data?.message || err.message || 'Error enrolling in course',
+                code: err.data?.code
+            }
+        }
+    }
+
     return {
         fetchCourses,
-        fetchCourseById
+        fetchCourseById,
+        enrollCourse
     }
 }
 

Frontend-Learner/pages/browse/discovery.vue

@@ -44,11 +44,12 @@ const visibleCategories = computed(() => {
 });
 
 // Courses Data
-const { fetchCourses, fetchCourseById } = useCourse();
+const { fetchCourses, fetchCourseById, enrollCourse } = useCourse();
 const courses = ref<any[]>([]); 
 const isLoading = ref(false);
 const selectedCourse = ref<any>(null);
 const isLoadingDetail = ref(false);
+const isEnrolling = ref(false);
 
 const loadCourses = async () => {
   isLoading.value = true;
@@ -76,6 +77,28 @@ const selectCourse = async (id: number) => {
   isLoadingDetail.value = false;
 };
 
+const handleEnroll = async (id: number) => {
+  if (isEnrolling.value) return;
+  isEnrolling.value = true;
+  
+  const res = await enrollCourse(id);
+  
+  if (res.success) {
+    // Navigate to my-courses where the success modal will be shown
+    return navigateTo('/dashboard/my-courses?enrolled=true');
+  } else if (res.code === 409) {
+     // Already enrolled, maybe redirect to course learning page or my-courses?
+     // For now, let's redirect to my-courses as well, maybe with a different param or just same.
+     // User requirement didn't specify distinct behavior for 409 in UI terms, 
+     // but 'Already enrolled' implies they should go see it.
+     return navigateTo('/dashboard/my-courses');
+  } else {
+    alert(res.error || 'Failed to enroll');
+  }
+  
+  isEnrolling.value = false;
+};
+
 onMounted(() => {
   loadCategories();
   loadCourses();
@@ -416,13 +439,15 @@ const filteredCourses = computed(() => {
               </h2>
             </div>
 
-            <NuxtLink
-              :to="`/dashboard/my-courses?enroll=${selectedCourse.id}`"
+            <button
+              @click="handleEnroll(selectedCourse.id)"
               class="btn btn-primary w-full mb-4 text-white"
               style="height: 48px; font-size: 16px"
+              :disabled="isEnrolling"
             >
+              <span v-if="isEnrolling" class="spinner-border animate-spin inline-block w-4 h-4 border-2 rounded-full mr-2"></span>
               {{ $t('course.enrollNow') }}
-            </NuxtLink>
+            </button>
 
             <div class="text-sm text-slate-600 dark:text-slate-400 mb-4">
               <div