fixed overwrite on internal copy, DST drift in widget anchors, inline errors without controller and removed dead room lookup

lib/view/pages/talk/details/chat_info.dart

@@ -108,16 +108,11 @@ class _ChatInfoState extends State<ChatInfo> {
     if (result == null || !mounted) return;
 
     if (result is AvatarRemoveResult) {
-      var confirmed = false;
-      await showDialog<void>(
-        context: context,
-        builder: (_) => ConfirmDialog(
-          title: 'Gruppenbild entfernen',
-          content: 'Möchtest du das Gruppenbild wirklich entfernen?',
-          confirmButton: 'Entfernen',
-          onConfirm: () => confirmed = true,
-        ),
-      );
+      final confirmed = await const ConfirmDialog(
+        title: 'Gruppenbild entfernen',
+        content: 'Möchtest du das Gruppenbild wirklich entfernen?',
+        confirmButton: 'Entfernen',
+      ).ask(context);
       if (!confirmed || !mounted) return;
     }
 

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

@@ -32,17 +32,13 @@ class FavoriteToggleTile extends StatelessWidget {
 /// Resolves to true once the room was left.
 Future<bool> confirmLeaveRoom(BuildContext context, String token) async {
   final chatList = context.read<ChatListBloc>();
-  final left = await showDialog<bool>(
-    context: context,
-    builder: (_) => ConfirmDialog(
-      title: 'Talk-Chat verlassen',
-      content: 'Du benötigst ggf. eine Einladung um erneut beizutreten.',
-      confirmButton: 'Verlassen',
-      onConfirmAsync: () async {
-        await LeaveRoom(token).run();
-        unawaited(chatList.refresh());
-      },
-    ),
-  );
-  return left ?? false;
+  return ConfirmDialog(
+    title: 'Talk-Chat verlassen',
+    content: 'Du benötigst ggf. eine Einladung um erneut beizutreten.',
+    confirmButton: 'Verlassen',
+    onConfirmAsync: () async {
+      await LeaveRoom(token).run();
+      unawaited(chatList.refresh());
+    },
+  ).ask(context);
 }