fix(worker): allow the done toggle from any non-Running status

MarkDoneAsync was Idle-only, so a finished task (typically a list-handler
run with no worktree to merge) could not be ticked off. Guard on Running
instead and cover the other statuses with tests.

tests/ClaudeDo.Worker.Tests/Hub/TaskDoneDequeueHubTests.cs

@@ -98,6 +98,21 @@ public sealed class TaskDoneDequeueHubTests : IDisposable
         Assert.Equal(TaskStatus.Running, reloaded!.Status);
     }
 
+    // Regression: the guard was Idle-only, so a finished task (typically a list-handler run,
+    // which has no worktree to merge) could no longer be ticked off from the task card.
+    [Fact]
+    public async Task SetTaskDone_FromWaitingForReview_TransitionsToDone()
+    {
+        var listId = await SeedListAsync();
+        var task = await SeedTaskAsync(listId, TaskStatus.WaitingForReview);
+
+        var hub = CreateHub();
+        await hub.SetTaskDone(task.Id);
+
+        var reloaded = await _tasks.GetByIdAsync(task.Id);
+        Assert.Equal(TaskStatus.Done, reloaded!.Status);
+    }
+
     // ── UnsetTaskDone ──
 
     [Fact]