perf(8502): 并行生图(6并发)+超时重试；视频URL直连预览/下载；路径隔离

modules/db_manager.py

@@ -113,6 +113,25 @@ class DBManager:
         finally:
             session.close()
 
+    def update_project_product_info(self, project_id: str, product_info: Dict[str, Any]):
+        """
+        Update project.product_info JSON (read-write with Postgres shared DB).
+        Used to persist editor state without changing schema.
+        """
+        session = self._get_session()
+        try:
+            project = session.query(Project).filter_by(id=project_id).first()
+            if project:
+                project.product_info = json.dumps(product_info, ensure_ascii=False)
+                project.updated_at = time.time()
+                session.commit()
+        except Exception as e:
+            session.rollback()
+            logger.error(f"Error updating product_info: {e}")
+            raise
+        finally:
+            session.close()
+
     def update_project_status(self, project_id: str, status: str):
         session = self._get_session()
         try:
@@ -260,6 +279,35 @@ class DBManager:
         finally:
             session.close()
 
+    def update_asset_metadata(self, project_id: str, scene_id: int, asset_type: str, patch: Dict[str, Any]) -> None:
+        """Merge-patch asset.metadata JSON without overwriting other fields."""
+        if not patch:
+            return
+        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
+            try:
+                existing = json.loads(asset.metadata_json) if asset.metadata_json else {}
+            except Exception:
+                existing = {}
+            if not isinstance(existing, dict):
+                existing = {}
+            existing.update(patch)
+            asset.metadata_json = json.dumps(existing, ensure_ascii=False)
+            asset.updated_at = time.time()
+            session.commit()
+        except Exception as e:
+            session.rollback()
+            logger.error(f"Error updating asset metadata: {e}")
+        finally:
+            session.close()
+
     # --- Config/Prompt Operations ---
 
     def get_config(self, key: str, default: Any = None) -> Any: