implemented dynamic module settings and configurable bottom bar, added all-day event support to timetable, and overhauled marianum dates UI with month grouping and search

lib/view/pages/timetable/data/timetable_appointment_factory.dart

@@ -68,27 +68,51 @@ class TimetableAppointmentFactory {
     }
   }
 
-  Appointment _customEventToAppointment(CustomTimetableEvent event) => Appointment(
-        id: CustomAppointment(event),
-        startTime: event.startDate,
-        endTime: event.endDate,
-        location: _collapseWhitespace(event.description),
-        subject: _collapseWhitespace(event.title) ?? event.title,
-        recurrenceRule: event.rrule,
-        color: TimetableColors.getColorFromString(event.color ?? TimetableColors.defaultColor.name),
-        startTimeZone: '',
-        endTimeZone: '',
-      );
+  Appointment _customEventToAppointment(CustomTimetableEvent event) {
+    final allDay = isCustomEventAllDay(event);
+    return Appointment(
+      id: CustomAppointment(event),
+      startTime: event.startDate,
+      endTime: allDay
+          ? DateTime(event.startDate.year, event.startDate.month, event.startDate.day, 23, 59)
+          : event.endDate,
+      isAllDay: allDay,
+      location: _collapseWhitespace(event.description),
+      subject: _collapseWhitespace(event.title) ?? event.title,
+      recurrenceRule: event.rrule,
+      color: TimetableColors.getColorFromString(event.color ?? TimetableColors.defaultColor.name),
+      startTimeZone: '',
+      endTimeZone: '',
+    );
+  }
+
+  /// All-day convention: a `CustomTimetableEvent` is treated as all-day when
+  /// its `startDate` and `endDate` both land on midnight of the same day.
+  /// Keeps the backend schema unchanged — the editor stores all-day events as
+  /// `start == end == midnight(date)`.
+  static bool isCustomEventAllDay(CustomTimetableEvent event) {
+    final s = event.startDate;
+    final e = event.endDate;
+    return s.year == e.year &&
+        s.month == e.month &&
+        s.day == e.day &&
+        s.hour == 0 &&
+        s.minute == 0 &&
+        s.second == 0 &&
+        e.hour == 0 &&
+        e.minute == 0 &&
+        e.second == 0;
+  }
 
   String _subjectName(GetTimetableResponseObject lesson) {
     final subject = subjects.result.firstWhereOrNull((s) => s.id == lesson.su.firstOrNull?.id);
-    if (subject == null) return 'Unbekannt';
+    if (subject == null) return 'Event';
     final name = switch (settings.timetableNameMode) {
       TimetableNameMode.name => subject.name,
       TimetableNameMode.longName => subject.longName,
       TimetableNameMode.alternateName => subject.alternateName,
     };
-    return _collapseWhitespace(name) ?? 'Unbekannt';
+    return _collapseWhitespace(name) ?? 'Event';
   }
 
   String _locationLabel(GetTimetableResponseObject lesson) {