fix: automate graduate timetable read and refine blue glass Dock

mobile/lib/features/school/school_auth_page.dart

@@ -22,7 +22,11 @@ class _SchoolAuthPageState extends State<SchoolAuthPage> {
   void initState() {
     super.initState();
     widget.session.addListener(_changed);
-    WidgetsBinding.instance.addPostFrameCallback((_) => _changed());
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (!mounted) return;
+      widget.session.setReadingActive(true);
+      _changed();
+    });
   }
 
   void _changed() {
@@ -80,6 +84,7 @@ class _SchoolAuthPageState extends State<SchoolAuthPage> {
   @override
   void dispose() {
     widget.session.removeListener(_changed);
+    widget.session.setReadingActive(false);
     super.dispose();
   }
 
@@ -96,10 +101,8 @@ class _SchoolAuthPageState extends State<SchoolAuthPage> {
             icon: const Icon(Icons.refresh_rounded),
           ),
           IconButton(
-            tooltip: '重试读取',
-            onPressed: _saving
-                ? null
-                : (s.requestingExams ? s.openExams : s.openTimetable),
+            tooltip: '读取当前页面',
+            onPressed: _saving ? null : s.readCurrentPage,
             icon: const Icon(Icons.sync_rounded),
           ),
         ],