Tab restore

src/GuiApp/Avalonia/FileTime.GuiApp/Views/MainWindow.axaml

@@ -22,6 +22,7 @@
     Icon="/Assets/filetime.ico"
     InputElement.KeyDown="OnKeyDown"
     Opened="OnWindowOpened"
+    Closed="OnWindowClosed"
     TransparencyLevelHint="Blur"
     mc:Ignorable="d">
 

src/GuiApp/Avalonia/FileTime.GuiApp/Views/MainWindow.axaml.cs

@@ -82,7 +82,7 @@ public partial class MainWindow : Window
             && sender is StyledElement control)
         {
             FullName? path = null;
-            if (control.DataContext is IHaveFullPath { Path: { } } hasFullPath)
+            if (control.DataContext is IHaveFullPath {Path: { }} hasFullPath)
             {
                 path = hasFullPath.Path;
             }
@@ -108,4 +108,10 @@ public partial class MainWindow : Window
             e.Handled = true;
         }
     }
+
+    private void OnWindowClosed(object? sender, EventArgs e)
+    {
+        var vm = ViewModel;
+        Task.Run(() => vm?.OnExit()).Wait();
+    }
 }