feat(ui): Ticket-Projekt pro Liste und Import ueber das Kontextmenue

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

@@ -16,6 +16,9 @@ public sealed partial class ListNavItemViewModel : ViewModelBase
     [ObservableProperty] private bool _isManual;
     // Whether this list's .claudedo/ findings folder is committed with the repo (ListEntity.FindingsTracked).
     [ObservableProperty] private bool _findingsTracked;
+    // True when a ticket-system base URL is configured AND this list has a linked ticket project
+    // (ListConfigEntity.TicketProjectId) — gates the "Update from ticket system" context menu entry.
+    [ObservableProperty] private bool _hasTicketProject;
     [ObservableProperty] private bool _dropHintAbove;
     [ObservableProperty] private bool _dropHintBelow;
     // Set while a dragged task hovers over this row as a move target — distinct from