feat(app): register UpdateCheckService and InstallerLocator in DI

src/ClaudeDo.Ui/ViewModels/IslandsShellViewModel.cs

@@ -19,6 +19,9 @@ public sealed partial class IslandsShellViewModel : ViewModelBase
 
     public bool IsOffline => !Worker.IsConnected && !Worker.IsReconnecting;
 
+    private readonly UpdateCheckService _updateCheck;
+    private readonly InstallerLocator _installerLocator;
+
     [ObservableProperty]
     private double _windowWidth = 1280;
 
@@ -47,9 +50,13 @@ public sealed partial class IslandsShellViewModel : ViewModelBase
         ListsIslandViewModel lists,
         TasksIslandViewModel tasks,
         DetailsIslandViewModel details,
-        WorkerClient worker)
+        WorkerClient worker,
+        UpdateCheckService updateCheck,
+        InstallerLocator installerLocator)
     {
         Lists = lists; Tasks = tasks; Details = details; Worker = worker;
+        _updateCheck = updateCheck;
+        _installerLocator = installerLocator;
         Lists.SelectionChanged += (_, _) => Tasks.LoadForList(Lists.SelectedList);
         Tasks.SelectionChanged += (_, _) => Details.Bind(Tasks.SelectedTask);
         Tasks.TasksChanged     += (_, _) => _ = Lists.RefreshCountsAsync();