fix(8502): 重生图片自动作废旧视频；记录来源图片签名并提示stale；组图/重生视频路径唯一化

modules/db_manager.py

@@ -308,6 +308,59 @@ class DBManager:
         finally:
             session.close()
 
+    def clear_asset(self, project_id: str, scene_id: int, asset_type: str, *, status: str = "pending") -> None:
+        """
+        Clear an asset record (keep the row, but remove paths/task/metadata).
+        Used to invalidate stale videos after images are regenerated.
+        """
+        session = self._get_session()
+        try:
+            asset = session.query(SceneAsset).filter_by(
+                project_id=project_id,
+                scene_id=scene_id,
+                asset_type=asset_type,
+            ).first()
+            if not asset:
+                return
+            asset.status = status
+            asset.local_path = None
+            asset.remote_url = None
+            asset.task_id = None
+            asset.metadata_json = "{}"
+            asset.updated_at = time.time()
+            session.commit()
+        except Exception as e:
+            session.rollback()
+            logger.error(f"Error clearing asset: {e}")
+        finally:
+            session.close()
+
+    def clear_assets(self, project_id: str, asset_type: str, *, status: str = "pending") -> int:
+        """
+        Clear all assets of a type for a project. Returns number of rows affected.
+        """
+        session = self._get_session()
+        try:
+            q = session.query(SceneAsset).filter_by(project_id=project_id, asset_type=asset_type)
+            rows = q.all()
+            if not rows:
+                return 0
+            for asset in rows:
+                asset.status = status
+                asset.local_path = None
+                asset.remote_url = None
+                asset.task_id = None
+                asset.metadata_json = "{}"
+                asset.updated_at = time.time()
+            session.commit()
+            return len(rows)
+        except Exception as e:
+            session.rollback()
+            logger.error(f"Error clearing assets: {e}")
+            return 0
+        finally:
+            session.close()
+
     # --- Config/Prompt Operations ---
 
     def get_config(self, key: str, default: Any = None) -> Any: