fix(worker): harden review re-run, timestamps, and queue affordance

- Clear ReviewFeedback only after a successful re-run so a failed/cancelled
  run keeps it for a manual retry.
- Clear stale StartedAt/FinishedAt when rejecting a task back to the queue.
- Only non-planning standalone tasks gate on review (guard PlanningPhase).
- Hide "send to queue" for WaitingForReview tasks so review isn't bypassed.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/ClaudeDo.Worker.Tests/Services/QueueServiceTests.cs

@@ -156,13 +156,24 @@ public sealed class QueueServiceTests : IDisposable
         await service.StartAsync(cts.Token);
         _waker.Wake();
         await done.Task.WaitAsync(TimeSpan.FromSeconds(5));
-        cts.Cancel();
 
         Assert.Contains("--resume sess-1", capturedArgs);
         Assert.Equal("fix the bug", capturedPrompt);
 
-        var reloaded = await _taskRepo.GetByIdAsync(task.Id);
-        Assert.Null(reloaded!.ReviewFeedback);
+        // Feedback is cleared after the run reaches a successful terminal state (post-run),
+        // so poll rather than asserting on the handler-fired instant.
+        var deadline = DateTime.UtcNow.AddSeconds(5);
+        TaskEntity? reloaded;
+        do
+        {
+            reloaded = await new TaskRepository(_db.CreateContext()).GetByIdAsync(task.Id);
+            if (reloaded?.ReviewFeedback is null) break;
+            await Task.Delay(25);
+        } while (DateTime.UtcNow < deadline);
+        cts.Cancel();
+
+        Assert.Equal(TaskStatus.WaitingForReview, reloaded!.Status);
+        Assert.Null(reloaded.ReviewFeedback);
     }
 
     [Fact]