fix(ui): preserve status message after cleanup; English label

Remove StatusMessage reset from LoadAsync so CleanupFinished result survives the reload; reset moved to Refresh command only. Also rename German context-menu label to "Worktrees…".

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

src/ClaudeDo.Ui/ViewModels/Modals/WorktreesOverviewModalViewModel.cs

@@ -78,7 +78,6 @@ public sealed partial class WorktreesOverviewModalViewModel : ViewModelBase
     public async Task LoadAsync(CancellationToken ct = default)
     {
         IsBusy = true;
-        StatusMessage = null;
         try
         {
             var dtos = await _worker.GetWorktreesOverviewAsync(ListIdFilter);
@@ -111,7 +110,11 @@ public sealed partial class WorktreesOverviewModalViewModel : ViewModelBase
     }
 
     [RelayCommand]
-    private Task Refresh() => LoadAsync();
+    private Task Refresh()
+    {
+        StatusMessage = null;
+        return LoadAsync();
+    }
 
     [RelayCommand]
     private async Task CleanupFinished()

src/ClaudeDo.Ui/Views/Islands/ListsIslandView.axaml

@@ -132,7 +132,7 @@
                     <MenuItem Header="Settings..."
                               Command="{Binding $parent[UserControl].((vm:ListsIslandViewModel)DataContext).OpenListSettingsCommand}"
                               CommandParameter="{Binding}"/>
-                    <MenuItem Header="Worktrees anzeigen…"
+                    <MenuItem Header="Worktrees…"
                               Command="{Binding $parent[UserControl].((vm:ListsIslandViewModel)DataContext).OpenWorktreesOverviewCommand}"
                               CommandParameter="{Binding}"/>
                   </ContextMenu>