Show the window before slow location probes and wrap git.exe for commit, diff, and merge.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/Explorer.App/App.xaml.cs

@@ -35,11 +35,21 @@ public partial class App : System.Windows.Application
             .Build();
 
         var vm = _host.Services.GetRequiredService<MainViewModel>();
-        await vm.InitializeAsync().ConfigureAwait(true);
-        await _host.StartAsync().ConfigureAwait(true);
         var window = _host.Services.GetRequiredService<MainWindow>();
+        vm.PrepareUi();
         window.DataContext = vm;
         window.Show();
+        try
+        {
+            await vm.InitializeAsync().ConfigureAwait(true);
+        }
+        catch (Exception ex)
+        {
+            Log.Error(ex, "Startup initialization failed");
+            vm.Footer = "Started with errors. See logs.";
+        }
+
+        await _host.StartAsync().ConfigureAwait(true);
     }
 
     protected override async void OnExit(ExitEventArgs e)