feat: Implement course management composable with course fetching and enrollment, and create a user dashboard to display enrolled courses.

Frontend-Learner/composables/useCourse.ts

@@ -608,6 +608,32 @@ export const useCourse = () => {
         }
     }
 
+    // ฟังก์ชันดึงรายการใบ Certificate ทั้งหมดของผู้ใช้ (ใหม่)
+    // Endpoint: GET /certificates
+    const fetchAllCertificates = async () => {
+        try {
+            const data = await $fetch<{ code: number; message: string; data: Certificate[] }>(`${API_BASE_URL}/certificates`, {
+                method: 'GET',
+                headers: token.value ? {
+                    Authorization: `Bearer ${token.value}`
+                } : {}
+            })
+
+            return {
+                success: true,
+                data: data.data || []
+            }
+        } catch (err: any) {
+            console.error('Fetch all certificates failed:', err)
+            return {
+                success: false,
+                error: err.data?.message || err.message || 'Error fetching certificates',
+                code: err.data?.code,
+                status: err.status
+            }
+        }
+    }
+
     return {
         fetchCourses,
         fetchCourseById,
@@ -622,6 +648,7 @@ export const useCourse = () => {
         submitQuiz,
         generateCertificate,
         getCertificate,
+        fetchAllCertificates,
         fetchCourseAnnouncements
     }
 }