fix: alot

lib/views/dialogs/new_tab_dialog.dart

@@ -3,6 +3,7 @@ import 'package:provider/provider.dart';
 
 import '../../l10n/app_localizations.dart';
 import '../../viewmodels/bar_screen_view_model.dart';
+import 'duplicate_tab_name_dialog.dart';
 
 /// Returns the name of the opened tab, or null when nothing was opened.
 Future<String?> showNewTabDialog(BuildContext context) async {
@@ -42,8 +43,14 @@ Future<String?> showNewTabDialog(BuildContext context) async {
   final trimmed = name?.trim() ?? '';
   if (trimmed.isEmpty || !context.mounted) return null;
 
+  final viewModel = context.read<BarScreenViewModel>();
+  if (viewModel.hasOpenTabNamed(trimmed) &&
+      !await confirmDuplicateTabName(context, trimmed)) {
+    return null;
+  }
+
   try {
-    await context.read<BarScreenViewModel>().createTab(trimmed);
+    await viewModel.createTab(trimmed);
     return trimmed;
   } catch (_) {
     if (context.mounted) {