show classname instead of teacher name in teacher timetable view

lib/view/pages/timetable/widgets/timetable_calendar_view.dart

@@ -28,6 +28,10 @@ class TimetableCalendarView extends StatefulWidget {
   final void Function(DateTime start, DateTime end)? onCreateEvent;
   final List<CustomTimetableEvent> customEvents;
 
+  /// True for teacher plans — tiles then show the class instead of the
+  /// teacher name (see [TimetableAppointmentFactory.showClassInsteadOfTeacher]).
+  final bool showClassInsteadOfTeacher;
+
   const TimetableCalendarView({
     super.key,
     required this.state,
@@ -35,6 +39,7 @@ class TimetableCalendarView extends StatefulWidget {
     required this.onAppointmentTap,
     this.onCreateEvent,
     this.customEvents = const [],
+    this.showClassInsteadOfTeacher = false,
   });
 
   @override
@@ -46,9 +51,9 @@ class TimetableCalendarViewState extends State<TimetableCalendarView> {
       GlobalKey<CustomWorkWeekCalendarState>();
 
   List<Appointment>? _cachedAppointments;
-  int? _lastDataVersion;
-  TimetableSettings? _lastTimetableSettings;
-  List<CustomTimetableEvent>? _lastCustomEvents;
+  // TimetableSettings and List define no `==`, so record equality degrades to
+  // the same identity checks the cache always used.
+  (int, TimetableSettings, List<CustomTimetableEvent>, bool)? _cacheKey;
 
   DateTime _initialDisplayDate() => DateTime.now().addDays(2);
 
@@ -63,15 +68,16 @@ class TimetableCalendarViewState extends State<TimetableCalendarView> {
         .watch<SettingsCubit>()
         .val()
         .timetableSettings;
-    if (_cachedAppointments != null &&
-        _lastDataVersion == state.dataVersion &&
-        identical(_lastTimetableSettings, timetableSettings) &&
-        identical(_lastCustomEvents, widget.customEvents)) {
+    final key = (
+      state.dataVersion,
+      timetableSettings,
+      widget.customEvents,
+      widget.showClassInsteadOfTeacher,
+    );
+    if (_cachedAppointments != null && _cacheKey == key) {
       return _cachedAppointments!;
     }
-    _lastDataVersion = state.dataVersion;
-    _lastTimetableSettings = timetableSettings;
-    _lastCustomEvents = widget.customEvents;
+    _cacheKey = key;
 
     return _cachedAppointments = TimetableAppointmentFactory(
       lessons: state.getAllKnownLessons().toList(),
@@ -80,6 +86,7 @@ class TimetableCalendarViewState extends State<TimetableCalendarView> {
       holidays: state.schoolHolidays?.result ?? const [],
       settings: timetableSettings,
       now: DateTime.now(),
+      showClassInsteadOfTeacher: widget.showClassInsteadOfTeacher,
     ).build();
   }