Кнопка настроек теперь в верхнем левом углу

src/KeyKeeper/ViewModels/MainWindowViewModel.cs

@@ -1,17 +1,22 @@
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using KeyKeeper.Views;
+using Avalonia.Controls;
 
 namespace KeyKeeper.ViewModels;
-
 public partial class MainWindowViewModel : ViewModelBase
 {
     public string Greeting { get; } = "Welcome to Avalonia!";
-
     [RelayCommand]
-    private void OpenSettings()
+    private async void OpenSettings()
     {
         var settingsWindow = new SettingsWindow();
-        settingsWindow.Show();
+        await settingsWindow.ShowDialog(GetMainWindow());
+    }
+    private static Window? GetMainWindow()
+    {
+        return App.Current?.ApplicationLifetime is Avalonia.Controls.ApplicationLifetimes.IClassicDesktopStyleApplicationLifetime desktop
+            ? desktop.MainWindow
+            : null;
     }
 }