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>

src/ClaudeDo.Worker/Runner/TaskRunner.cs

@@ -324,8 +324,9 @@ public sealed class TaskRunner
         // after the Claude run already succeeded.
         // Standalone tasks gate on review; planning children go straight to Done
         // so the sequential chain (which advances on terminal states) is unaffected.
+        // Planning parents (PlanningPhase != None) are containers, not reviewable work.
         var finishedAt = DateTime.UtcNow;
-        if (task.ParentTaskId is null)
+        if (task.ParentTaskId is null && task.PlanningPhase == PlanningPhase.None)
         {
             await _state.SubmitForReviewAsync(task.Id, finishedAt, result.ResultMarkdown, CancellationToken.None);
             await _broadcaster.WorkerLog($"Finished \"{task.Title}\" (waiting for review)", WorkerLogLevel.Success, DateTime.UtcNow);