implemented custom subject colors for the timetable and unified the color palette system

lib/view/pages/timetable/custom_events/custom_event_colors.dart

@@ -1,43 +0,0 @@
-import 'package:flutter/material.dart';
-
-import '../../../../theming/dark_app_theme.dart';
-
-enum CustomTimetableColors { orange, red, green, blue }
-
-class TimetableColors {
-  static const CustomTimetableColors defaultColor =
-      CustomTimetableColors.orange;
-
-  static ColorModeDisplay getDisplayOptions(CustomTimetableColors color) {
-    switch (color) {
-      case CustomTimetableColors.green:
-        return ColorModeDisplay(color: Colors.green, displayName: 'Grün');
-      case CustomTimetableColors.blue:
-        return ColorModeDisplay(color: Colors.blue, displayName: 'Blau');
-      case CustomTimetableColors.orange:
-        return ColorModeDisplay(
-          color: Colors.orange.shade800,
-          displayName: 'Orange',
-        );
-      case CustomTimetableColors.red:
-        return ColorModeDisplay(
-          color: DarkAppTheme.marianumRed,
-          displayName: 'Rot',
-        );
-    }
-  }
-
-  static Color getColorFromString(String color) => getDisplayOptions(
-    CustomTimetableColors.values.firstWhere(
-      (e) => e.name == color,
-      orElse: () => defaultColor,
-    ),
-  ).color;
-}
-
-class ColorModeDisplay {
-  final Color color;
-  final String displayName;
-
-  ColorModeDisplay({required this.color, required this.displayName});
-}

lib/view/pages/timetable/custom_events/custom_event_edit_dialog.dart

@@ -12,7 +12,8 @@ import '../../../../state/app/modules/timetable/bloc/timetable_bloc.dart';
 import '../../../../widget/async_action_button.dart';
 import '../../../../widget/demo_restricted.dart';
 import '../../../../widget/focus_behaviour.dart';
-import 'custom_event_colors.dart';
+import '../data/subject_color_palette.dart';
+import '../subject_colors/subject_color_picker.dart';
 
 class CustomEventEditDialog extends StatefulWidget {
   final CustomTimetableEvent? existingEvent;
@@ -61,10 +62,9 @@ class _CustomEventEditDialogState extends State<CustomEventEditDialog> {
   // mhsl-Termine tragen ausgeschaltet (Modell-Default), da sie nie ein Serien-
   // Ferien-Flag hatten.
   late bool _skipHolidays = widget.existingEvent?.skipHolidays ?? true;
-  late CustomTimetableColors _color = CustomTimetableColors.values.firstWhere(
-    (e) => e.name == widget.existingEvent?.color,
-    orElse: () => TimetableColors.defaultColor,
-  );
+  late SubjectColor _color =
+      SubjectColorPalette.fromName(widget.existingEvent?.color) ??
+      SubjectColorPalette.defaultColor;
 
   bool get _isEditing => widget.existingEvent != null;
 
@@ -261,30 +261,18 @@ class _CustomEventEditDialogState extends State<CustomEventEditDialog> {
           ListTile(
             leading: const Icon(Icons.color_lens_outlined),
             title: const Text('Farbgebung'),
-            trailing: DropdownButton<CustomTimetableColors>(
-              value: _color,
-              icon: const Icon(Icons.arrow_drop_down),
-              items: CustomTimetableColors.values
-                  .map(
-                    (e) => DropdownMenuItem<CustomTimetableColors>(
-                      value: e,
-                      enabled: e != _color,
-                      child: Row(
-                        children: [
-                          Icon(
-                            Icons.circle,
-                            color: TimetableColors.getDisplayOptions(e).color,
-                          ),
-                          const SizedBox(width: 10),
-                          Text(
-                            TimetableColors.getDisplayOptions(e).displayName,
-                          ),
-                        ],
-                      ),
-                    ),
-                  )
-                  .toList(),
-              onChanged: (e) => setState(() => _color = e!),
+            subtitle: Text(SubjectColorPalette.displayOf(_color).displayName),
+            trailing: Icon(
+              Icons.circle,
+              color: SubjectColorPalette.displayOf(_color).color,
+            ),
+            onTap: () => showTimetableColorPicker(
+              context,
+              title: 'Farbe wählen',
+              current: _color,
+              // Rein lokal (kein Netzwerk) — Sheet schließt sofort, gespeichert
+              // wird erst beim „Speichern" des Termins.
+              onSelected: (option) async => setState(() => _color = option),
             ),
           ),
           const Divider(),