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:

modules/video_gen.py

@@ -6,6 +6,7 @@ import logging
 import time
 import requests
 import os
+from os import stat
 from typing import Dict, Any, List, Optional
 from pathlib import Path
 
@@ -56,6 +57,21 @@ class VideoGenerator:
         task_id = self._submit_task(image_url, prompt)
         
         if task_id:
+            try:
+                st = stat(image_path)
+                source_sig = {
+                    "source_image_local_path": image_path,
+                    "source_image_size": int(getattr(st, "st_size", 0) or 0),
+                    "source_image_mtime": float(getattr(st, "st_mtime", 0.0) or 0.0),
+                    "source_image_r2_url": image_url,
+                    "submitted_at": time.time(),
+                }
+            except Exception:
+                source_sig = {
+                    "source_image_local_path": image_path,
+                    "source_image_r2_url": image_url,
+                    "submitted_at": time.time(),
+                }
             # 立即保存 task_id 到数据库，状态为 processing
             db.save_asset(
                 project_id=project_id,
@@ -63,7 +79,8 @@ class VideoGenerator:
                 asset_type="video",
                 status="processing",
                 task_id=task_id,
-                local_path=None
+                local_path=None,
+                metadata=source_sig,
             )
             
         return task_id