feat(ui): open ListSettingsModal via context menu and gear button

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/ClaudeDo.Ui/ViewModels/Islands/ListNavItemViewModel.cs

@@ -9,6 +9,8 @@ public sealed partial class ListNavItemViewModel : ViewModelBase
     public required ListKind Kind { get; init; }
     [ObservableProperty] private int _count;
     [ObservableProperty] private bool _isActive;
+    [ObservableProperty] private string? _workingDir;
+    [ObservableProperty] private string _defaultCommitType = "chore";
     public string? IconKey { get; init; }
     public string? DotColorKey { get; init; }
 }