show classname instead of teacher name in teacher timetable view

lib/state/app/modules/capabilities/bloc/capabilities_cubit.dart

@@ -21,6 +21,10 @@ class CapabilitiesCubit extends HydratedCubit<CapabilitiesState> {
 
   int? get timetableFutureDays => state.timetableFutureDays;
 
+  /// Teacher accounts get the class shown on timetable tiles instead of their
+  /// own name (see TimetableAppointmentFactory.showClassInsteadOfTeacher).
+  bool get isTeacher => state.userType == 'TEACHER';
+
   /// Refreshes capabilities from the server. On any failure (endpoint not yet
   /// live, network error, 4xx) the previously hydrated flags are kept but the
   /// state is marked `loaded` — a failed fetch never silently grants a
@@ -38,6 +42,7 @@ class CapabilitiesCubit extends HydratedCubit<CapabilitiesState> {
           pushNotifications: response.pushNotifications,
           timetablePastDays: response.timetablePastDays,
           timetableFutureDays: response.timetableFutureDays,
+          userType: response.userType,
           loaded: true,
         ),
       );