feat(web): migrate messaging and personal timetable

Complete scoped notification composition and recipient selection, and add the React personal timetable with week navigation, integrated exam and experiment entries, exports, and calendar subscription lifecycle management.

web-react/src/app/App.tsx

@@ -10,6 +10,7 @@ const DashboardPage = lazy(() => import('../pages/DashboardPage'))
 const AccountPage = lazy(() => import('../pages/AccountPage'))
 const UsersPage = lazy(() => import('../pages/UsersPage'))
 const NotificationsPage = lazy(() => import('../pages/NotificationsPage'))
+const MyTimetablePage = lazy(() => import('../pages/MyTimetablePage'))
 const SsoCallbackPage = lazy(() => import('../pages/SsoCallbackPage'))
 const SsoBindPage = lazy(() => import('../pages/SsoBindPage'))
 const AppShell = lazy(() => import('../layout/AppShell'))
@@ -54,6 +55,7 @@ function AppRoutes() {
           <Route path="/account" element={<AccountPage />} />
           <Route path="/users" element={<UsersPage />} />
           <Route path="/notifications" element={<NotificationsPage />} />
+          <Route path="/my-timetable" element={<MyTimetablePage />} />
           <Route path="/" element={<Navigate to="/dashboard" replace />} />
         </Route>
         <Route path="*" element={<Navigate to="/dashboard" replace />} />