feat(ui): move review feedback to the Output tab + review/worktree polish

- Feedback box + a new "Resume session" button move from the Git tab to the
  Output tab; the Git review block keeps Approve & Merge / Park / Cancel / Reset.
- Add a "Parked" chip for Idle tasks that still hold an Active worktree.
- Stop showing the "Session was Cancelled" band on cancel (failed-only now).
- Fix the Worktrees-overview state-chip contrast (dark text on the colour).

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

@@ -166,10 +166,9 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
     public string DiffAddText => $"+{DiffAdditions}";
     public string DiffDelText => $"-{DiffDeletions}";
 
-    public bool ShowRoadblock => IsFailed || IsCancelled;
+    public bool ShowRoadblock => IsFailed;
     public string RoadblockMessage =>
-        IsFailed ? "The session ended with an error." :
-        IsCancelled ? "The session was cancelled." : "";
+        IsFailed ? "The session ended with an error." : "";
 
     [ObservableProperty]
     [NotifyPropertyChangedFor(nameof(ShowSessionOutcome))]