simplified code across the app and consolidated duplicated helpers

lib/view/pages/talk/widgets/chat_tile.dart

@@ -17,13 +17,13 @@ import '../../../../state/app/modules/chat_list/bloc/chat_list_bloc.dart';
 import '../../../../utils/haptics.dart';
 import '../../../../widget/a11y/a11y_labels.dart';
 import '../../../../widget/async_action_button.dart';
-import '../../../../widget/confirm_dialog.dart';
 import '../../../../widget/debug/debug_tile.dart';
 import '../../../../widget/details_bottom_sheet.dart';
 import '../../../../widget/user_avatar.dart';
 import '../data/talk_markdown.dart';
 import '../talk_navigator.dart';
 import 'notification_level_sheet.dart';
+import 'room_actions.dart';
 
 class ChatTile extends StatefulWidget {
   final GetRoomResponseObject data;
@@ -48,11 +48,12 @@ class ChatTile extends StatefulWidget {
 }
 
 class _ChatTileState extends State<ChatTile> {
-  String? selfUsername;
+  String? selfUsername = SessionManager().current?.nextcloud?.username;
 
   @override
   void initState() {
     super.initState();
+    if (selfUsername != null) return;
     SessionManager().waitForLoad().then((session) {
       if (!mounted) return;
       setState(() => selfUsername = session?.nextcloud?.username);
@@ -124,9 +125,8 @@ class _ChatTileState extends State<ChatTile> {
             label: isGroup ? A11yLabels.group : null,
             child: ExcludeSemantics(child: circleAvatar),
           ),
-          Visibility(
-            visible: widget.data.isFavorite,
-            child: Positioned(
+          if (widget.data.isFavorite)
+            Positioned(
               right: 0,
               bottom: 0,
               child: Container(
@@ -143,7 +143,6 @@ class _ChatTileState extends State<ChatTile> {
                 ),
               ),
             ),
-          ),
         ],
       ),
       title: Row(
@@ -241,24 +240,16 @@ class _ChatTileState extends State<ChatTile> {
                   if (mounted) _refreshList();
                 },
               ),
-            if (widget.data.isFavorite)
-              AsyncListTile(
-                leading: const Icon(Icons.stars_outlined),
-                title: const Text('Von Favoriten entfernen'),
-                onPressed: () async {
-                  await SetFavorite(widget.data.token, false).run();
-                  if (mounted) _refreshList();
-                },
-              )
-            else
-              AsyncListTile(
-                leading: const Icon(Icons.star_outline),
-                title: const Text('Zu Favoriten hinzufügen'),
-                onPressed: () async {
-                  await SetFavorite(widget.data.token, true).run();
-                  if (mounted) _refreshList();
-                },
-              ),
+            FavoriteToggleTile(
+              isFavorite: widget.data.isFavorite,
+              onPressed: () async {
+                await SetFavorite(
+                  widget.data.token,
+                  !widget.data.isFavorite,
+                ).run();
+                if (mounted) _refreshList();
+              },
+            ),
             NotificationLevelTile(
               level: widget.data.effectiveNotificationLevel,
               onTap: () {
@@ -275,16 +266,7 @@ class _ChatTileState extends State<ChatTile> {
               title: const Text('Talk-Chat verlassen'),
               onTap: () {
                 Navigator.of(sheetCtx).pop();
-                ConfirmDialog(
-                  title: 'Talk-Chat verlassen',
-                  content:
-                      'Du benötigst ggf. eine Einladung um erneut beizutreten.',
-                  confirmButton: 'Verlassen',
-                  onConfirmAsync: () async {
-                    await LeaveRoom(widget.data.token).run();
-                    if (mounted) _refreshList();
-                  },
-                ).asDialog(context);
+                confirmLeaveRoom(context, widget.data.token);
               },
             ),
             DebugTile(sheetCtx).jsonData(widget.data.toJson()),