How to prohibit maximize window by double clicking toolbar or area within "DragToMoveArea"?

[dbsxdbsx]

I want to prevent user to resize app, my main code like this :

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  if (Platform.isWindows) {
    await WindowManager.instance.ensureInitialized();
    windowManager.waitUntilReadyToShow().then((_) async {
      await windowManager.setTitleBarStyle(
        TitleBarStyle.hidden,
        windowButtonVisibility: false,
      );
      await windowManager.setSize(const Size(755, 545));
      await windowManager.setMinimumSize(const Size(755, 545));
      await windowManager.setPreventClose(true);
      await windowManager.setSkipTaskbar(false);
      await windowManager.setResizable(false);
      await windowManager.setMinimizable(true);
      await windowManager.center();
      await windowManager.focus();
      await windowManager.show();
    });
  }
...

And my home page is wrapped within "DragToMoveArea". But the app can still be maximized by double clicking any area of the page.

[dbsxdbsx]

sorry, I pasted in wrong repository.