Implement requested Jiaowu workflow updates

web/src/layouts/AdminLayout.vue

@@ -66,7 +66,10 @@ const navigationGroups = computed<NavigationGroup[]>(() => [
     key: 'overview',
     label: '教务总览',
     direct: true,
-    items: [{ path: '/dashboard', label: '教务总览' }],
+    items: [
+      { path: '/dashboard', label: '教务总览' },
+      { path: '/academic-calendar', label: '学期校历与日程' },
+    ],
   },
   ...(isStatisticsViewer.value
     ? [{