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

src/ClaudeDo.Ui/Views/WindowDialogService.cs

@@ -1,7 +1,9 @@
 using System;
+using System.Linq;
 using System.Threading.Tasks;
 using Avalonia;
 using Avalonia.Controls;
+using Avalonia.Controls.ApplicationLifetimes;
 using Avalonia.Layout;
 using Avalonia.Media;
 using ClaudeDo.Ui.Services;
@@ -31,6 +33,18 @@ public sealed class WindowDialogService : IDialogService
 
     private IslandsShellViewModel? Shell => _owner.DataContext as IslandsShellViewModel;
 
+    // Own modals to the window the user is actually looking at (e.g. the Mission Control
+    // window when Settings is opened from there), falling back to the main window.
+    private Window ActiveOwner()
+    {
+        if (Application.Current?.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        {
+            var active = desktop.Windows.FirstOrDefault(w => w.IsActive);
+            if (active is not null) return active;
+        }
+        return _owner;
+    }
+
     public async Task ShowAboutAsync(AboutModalViewModel vm)
     {
         var dlg = new AboutModalView { DataContext = vm };
@@ -48,7 +62,7 @@ public sealed class WindowDialogService : IDialogService
     public async Task ShowSettingsAsync(SettingsModalViewModel vm)
     {
         var dlg = new SettingsModalView { DataContext = vm };
-        await dlg.ShowDialog(_owner);
+        await dlg.ShowDialog(ActiveOwner());
     }
 
     public async Task ShowListSettingsAsync(ListSettingsModalViewModel vm)