fix(bug): bug fix

api/app/services/app_chat_service.py

@@ -187,7 +187,7 @@ class AppChatService:
             "usage": result.get("usage", {"prompt_tokens": 0, "completion_tokens": 0, "total_tokens": 0}),
             "audio_url": None
         }
-        if files:
+        if processed_files:
             human_meta["files"].extend(processed_files)
 
         # 保存消息
@@ -395,13 +395,8 @@ class AppChatService:
                 "audio_url": None
             }
 
-            if files:
-                for f in files:
-                    # url = await MultimodalService(self.db).get_file_url(f)
-                    human_meta["files"].append({
-                        "type": f.type,
-                        "url": f.url
-                    })
+            if processed_files:
+                human_meta["files"].extend(processed_files)
 
             if stream_audio_url:
                 assistant_meta["audio_url"] = stream_audio_url