opt.

lib/view/page/setting/entry.dart

@@ -59,6 +59,12 @@ class _SettingsPageState extends State<SettingsPage>
   late final _tabCtrl =
       TabController(length: SettingsTabs.values.length, vsync: this);
 
+  @override
+  void dispose() {
+    super.dispose();
+    _tabCtrl.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(