implemented foreign timetable support for students, teachers, rooms, and classes, including a searchable element picker with favorites support, introduced a capabilities system for feature gating, refactored the timetable UI into a reusable TimetableCalendarView component, and redesigned the chat input field with a unified emoji picker and integrated attachment actions.

test/api/timetable_element_type_test.dart

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+import 'package:flutter_test/flutter_test.dart';
+import 'package:marianum_mobile/api/marianumconnect/queries/timetable_get_element_week/timetable_element_type.dart';
+
+void main() {
+  group('TimetableElementType.pathSegment', () {
+    test('maps each type to the backend URL segment', () {
+      expect(TimetableElementType.student.pathSegment, 'student');
+      expect(TimetableElementType.teacher.pathSegment, 'teacher');
+      expect(TimetableElementType.room.pathSegment, 'room');
+      // `schoolClass` exists only because `class` is a reserved word; the
+      // backend segment must still be `class`.
+      expect(TimetableElementType.schoolClass.pathSegment, 'class');
+    });
+  });
+
+  group('TimetableElementType.label', () {
+    test('provides a German singular label for each type', () {
+      expect(TimetableElementType.student.label, 'Schüler');
+      expect(TimetableElementType.teacher.label, 'Lehrer');
+      expect(TimetableElementType.room.label, 'Raum');
+      expect(TimetableElementType.schoolClass.label, 'Klasse');
+    });
+  });
+}