chore: 修复black/isort格式

packages/adapters/in_memory/asset_repository.py

@@ -45,9 +45,10 @@ class InMemoryAssetRepository:
 
     def batch_delete(self, asset_ids: list[str]) -> int:
         """批量删除素材（软删除，标记 status=deleted），返回实际影响数量。"""
-        from packages.domain import AssetStatus
         from datetime import datetime, timezone
 
+        from packages.domain import AssetStatus
+
         count = 0
         for aid in asset_ids:
             asset = self._assets.get(aid)

tests/integration/test_assets_api.py

@@ -130,9 +130,10 @@ class StubAssetRepository:
 
     def batch_delete(self, asset_ids: list[str]) -> int:
         """软删除：标记 status=deleted。"""
-        from packages.domain import AssetStatus
         from datetime import datetime, timezone
 
+        from packages.domain import AssetStatus
+
         count = 0
         for aid in asset_ids:
             asset = self._assets.get(aid)