feat(ui): complete Avalonia UI port with 7 main pages, tool settings & top MenuBar

src/ClawdDotNet.Desktop/Views/RestoreBackupWindow.axaml.cs

@@ -0,0 +1,42 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Platform.Storage;
+using ClawdDotNet.Desktop.ViewModels;
+
+namespace ClawdDotNet.Desktop.Views;
+
+public partial class RestoreBackupWindow : Window
+{
+    public RestoreBackupWindow()
+    {
+        InitializeComponent();
+    }
+
+    protected override void OnDataContextChanged(EventArgs e)
+    {
+        base.OnDataContextChanged(e);
+        if (DataContext is RestoreBackupViewModel vm)
+        {
+            vm.CloseRequested += () => Close();
+        }
+    }
+
+    private async void OnBrowseFolder(object? sender, RoutedEventArgs e)
+    {
+        if (DataContext is not RestoreBackupViewModel vm) return;
+
+        var storage = StorageProvider;
+        if (storage is null) return;
+
+        var folders = await storage.OpenFolderPickerAsync(new FolderPickerOpenOptions
+        {
+            Title = "Zielordner für Wiederherstellung wählen",
+            AllowMultiple = false
+        });
+
+        if (folders.Count > 0 && folders[0].TryGetLocalPath() is { } path)
+        {
+            vm.TargetDirectory = path;
+        }
+    }
+}