feat(ui): open Settings from the Mission Control header

src/ClaudeDo.Ui/ViewModels/MissionControlViewModel.cs

@@ -37,6 +37,9 @@ public sealed partial class MissionControlViewModel : ViewModelBase, IDisposable
     // invoked when that window closes.
     public Action<TaskMonitorViewModel, Action>? ShowDetached { get; set; }
 
+    // View-layer seam: open the app Settings modal from the Mission Control window.
+    public Action? OpenSettingsRequested { get; set; }
+
     public bool HasMonitors => Monitors.Count > 0;
 
     public MissionControlViewModel(IDbContextFactory<ClaudeDoDbContext> dbFactory, IWorkerClient worker)
@@ -115,6 +118,9 @@ public sealed partial class MissionControlViewModel : ViewModelBase, IDisposable
         }
     }
 
+    [RelayCommand]
+    private void OpenSettings() => OpenSettingsRequested?.Invoke();
+
     public void MoveMonitor(TaskMonitorViewModel dragged, TaskMonitorViewModel target)
     {
         if (ReferenceEquals(dragged, target)) return;