chore(claude-do): RepoImportFolders auf den WorkerHub-Pfad umziehen (Ui schrei

## Befund (am Code verifiziert 2026-08-06)

`AppSettingsEntity.RepoImportFolders` (`src/ClaudeDo.Data/Models/AppSettingsEntity.cs:26`, JSON-Array als TEXT) ist **nicht** Teil des `AppSettingsDto` in `src/ClaudeDo.Worker/Hub/WorkerHub.cs:32-49` und wird weder von `GetAppSettings` (~:375-393) noch von `UpdateAppSettings` (~:396-424) transportiert.

Stattdessen liest und schreibt die Ui das Feld dire

ClaudeDo-Task: 64fbe15d-ae7e-4d81-b8c1-045baa7e3c87

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

@@ -30,6 +30,9 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
     public event EventHandler? FocusSearchRequested;
     public void RequestFocusSearch() => FocusSearchRequested?.Invoke(this, EventArgs.Empty);
 
+    // mirrors TasksIslandViewModel.ErrorReported — surfaces modal-owned failures in the footer strip.
+    public event Action<string>? ErrorReported;
+
     public IDialogService? Dialogs { get; set; }
 
     [RelayCommand]
@@ -58,6 +61,7 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
     {
         if (Dialogs is null || _services is null) return;
         var vm = _services.GetRequiredService<RepoImportModalViewModel>();
+        vm.ErrorReported += msg => ErrorReported?.Invoke(msg);
         await vm.LoadAsync();
         await Dialogs.ShowRepoImportAsync(vm);
         await LoadAsync();