migrated timetable integration from WebUntis to the MarianumConnect API, implementing a Dio-based client with bearer token authentication, background session validation, and auto-refresh logic.

lib/view/pages/timetable/timetable.dart

@@ -13,7 +13,6 @@ import 'custom_events/custom_event_edit_dialog.dart';
 import 'data/arbitrary_appointment.dart';
 import 'data/lesson_period_schedule.dart';
 import 'data/timetable_appointment_factory.dart';
-import 'data/webuntis_time.dart';
 import 'details/appointment_details_dispatcher.dart';
 import 'widgets/custom_workweek_calendar.dart';
 import 'widgets/special_regions_builder.dart';
@@ -70,8 +69,7 @@ class _TimetableState extends State<Timetable> {
     return _cachedAppointments = TimetableAppointmentFactory(
       lessons: state.getAllKnownLessons().toList(),
       customEvents: state.customEvents?.events ?? const [],
-      rooms: state.rooms!,
-      subjects: state.subjects!,
+      subjects: state.subjects?.result ?? const [],
       settings: timetableSettings,
       now: DateTime.now(),
     ).build();
@@ -79,7 +77,7 @@ class _TimetableState extends State<Timetable> {
 
   bool _isCrossedOut(Appointment appointment) {
     final id = appointment.id;
-    if (id is WebuntisAppointment) return id.lesson.code == 'cancelled';
+    if (id is LessonAppointment) return id.entry.status == 'CANCELLED';
     return false;
   }
 
@@ -123,6 +121,13 @@ class _TimetableState extends State<Timetable> {
         ],
       ),
       body: LoadableStateConsumer<TimetableBloc, TimetableState>(
+        // Without this predicate the consumer treats the freshly-initialised
+        // empty TimetableState as "has content" and only shows the error bar
+        // on top — but `_calendar` collapses to `SizedBox.shrink()` while the
+        // reference data is missing, leaving the user with a blank screen.
+        // Telling the consumer that "ready" means having reference data
+        // flips it into the proper error-screen path instead.
+        isReady: (state) => state.hasReferenceData,
         child: (state, _) => _calendar(state, bloc),
       ),
     );
@@ -192,12 +197,12 @@ class _TimetableState extends State<Timetable> {
   /// `_mondayOf()` correctly walks back to the Monday of its own week,
   /// which is the last fully-allowed week.
   (DateTime, DateTime) _scrollBounds(TimetableState state) {
-    final year = state.schoolyear?.result;
+    final year = state.schoolyear;
     final DateTime baseMin;
     final DateTime baseMax;
     if (year != null) {
-      baseMin = WebuntisTime.parse(year.startDate, 0);
-      baseMax = WebuntisTime.parse(year.endDate, 0);
+      baseMin = year.startDate;
+      baseMax = year.endDate;
     } else {
       final now = DateTime.now();
       baseMin = now.subtractDays(14);