feat(ui): add settings modal and wire to worker hub

src/ClaudeDo.App/App.axaml.cs

@@ -1,6 +1,7 @@
 using Avalonia;
 using Avalonia.Controls.ApplicationLifetimes;
 using Avalonia.Markup.Xaml;
+using ClaudeDo.Ui.Services;
 using ClaudeDo.Ui.ViewModels;
 using ClaudeDo.Ui.Views;
 using Microsoft.Extensions.DependencyInjection;
@@ -24,6 +25,10 @@ public partial class App : Application
             {
                 DataContext = Services.GetRequiredService<IslandsShellViewModel>(),
             };
+
+            // Kick off the SignalR retry loop — reconnects indefinitely if the worker
+            // is not up yet, or goes down and comes back.
+            _ = Services.GetRequiredService<WorkerClient>().StartAsync();
         }
 
         base.OnFrameworkInitializationCompleted();