Resolve merge conflicts and fix student course details functionality

frontend/public/js/student.js

@@ -12,6 +12,12 @@ class StudentManager {
         this.initMyCourses();
         this.updateCurrentTime();
         setInterval(() => this.updateCurrentTime(), 1000);
+        
+        // 绑定刷新按钮
+        const refreshBtn = document.getElementById('refreshCourses');
+        if (refreshBtn) {
+            refreshBtn.addEventListener('click', () => this.initMyCourses());
+        }
     }
     
     updateCurrentTime() {
@@ -240,4 +246,4 @@ document.addEventListener('DOMContentLoaded', () => {
                 if (studentClassEl) studentClassEl.textContent = user.class || '未分配';
             }
         });
-});
+});