refactor(ui): remove pick-up-in-terminal, keep ConPTY as the single session entry

Two context-menu entries opened a Claude session for the same task via different
mechanisms (embedded ConPTY vs. an external wt terminal). Drop the external-terminal
path entirely, including its worker hub method, launcher plumbing, and localization
keys, since the embedded ConPTY session already covers every case it did.

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

@@ -813,7 +813,6 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
         Merge.SyncTaskContext(Task?.Id, Task?.Title, Task?.IsPlanningParent == true);
         NotifySessionSections();
         OnPropertyChanged(nameof(CanAcceptDrop));
-        OnPropertyChanged(nameof(CanPickUpInTerminal));
     }
 
     [RelayCommand]
@@ -955,24 +954,6 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
         catch { /* offline */ }
     }
 
-    // Pick up in a terminal only where a session + worktree reliably still exist (parked
-    // for review or failed mid-run); the worker reports a clear error otherwise.
-    public bool CanPickUpInTerminal => Task is not null
-        && Task.Status is ClaudeDo.Data.Models.TaskStatus.WaitingForReview
-                       or ClaudeDo.Data.Models.TaskStatus.Failed;
-
-    [RelayCommand]
-    private async System.Threading.Tasks.Task PickUpInTerminalAsync()
-    {
-        if (Task is null) return;
-        ClaudeDo.Ui.Services.ForegroundHelper.AllowAny();
-        try { await _worker.ResumeTaskInTerminalAsync(Task.Id); }
-        catch (System.Exception ex)
-        {
-            if (ShowErrorAsync != null) await ShowErrorAsync(ex.Message);
-        }
-    }
-
     [RelayCommand(CanExecute = nameof(CanEnqueue))]
     private async System.Threading.Tasks.Task EnqueueAsync()
     {