存量积累：生图素人感约束+评图分+幂等防重跑+审核回路

- 015-017迁移：image_candidate 文案复审/AI视觉分/重生标记
- constants C7素人感约束(反电商摆拍对齐真实笔记)+C3叠字口子
- celery visibility_timeout=2h 防长任务被误判重投重复烧钱(task75教训)
- image_scorer 评图分(只筛选+展示,真实信号才进飞轮权重)
- storyboard/image_gen/pipeline_io 生图存量
- task_actions/tasks/task_service/flywheel 审核回路+飞轮存量

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/app/services/flywheel_service.py

@@ -95,10 +95,10 @@ def get_preference_context(
             "injected_count": len(recent),
         }
 
-    # 统计最常被选中的角度
+    # 统计最常被选中的角度（text_edit 改稿=最强真实信号,按权重计入,倩倩姐2026-06-16）
     angle_counts: dict[str, int] = {}
     for ev in recent:
-        if ev.signal_type in (SignalType.TEXT_SELECT, SignalType.APPROVE) and ev.angle_label:
+        if ev.signal_type in (SignalType.TEXT_SELECT, SignalType.APPROVE, SignalType.TEXT_EDIT) and ev.angle_label:
             angle_counts[ev.angle_label] = angle_counts.get(ev.angle_label, 0) + 1
 
     top_angles = sorted(angle_counts.items(), key=lambda x: x[1], reverse=True)[:3]