feat: add batch AI re-organize for transfer history and search result recommendation

- Implement batch AI re-organize endpoint for transfer history with progress tracking
- Add batch_manual_transfer_redo system task template and prompt generation
- Refactor agent_manager to support generic background prompt execution
- Add AIRecommendChain for search result recommendation using agent background prompt
- Update search endpoints to use new AIRecommendChain and remove legacy code
- Enhance test cases for batch manual transfer redo
- Minor code cleanup and style fixes

app/startup/agent_initializer.py

@@ -10,10 +10,10 @@ class AgentInitializer:
     """
     AI智能体初始化器
     """
-    
+
     def __init__(self):
         self._initialized = False
-    
+
     async def initialize(self) -> bool:
         """
         初始化AI智能体管理器
@@ -22,16 +22,16 @@ class AgentInitializer:
             if not settings.AI_AGENT_ENABLE:
                 logger.info("AI智能体功能未启用")
                 return True
-            
+
             await agent_manager.initialize()
             self._initialized = True
             logger.info("AI智能体管理器初始化成功")
             return True
-            
+
         except Exception as e:
             logger.error(f"AI智能体管理器初始化失败: {e}")
             return False
-    
+
     async def cleanup(self) -> None:
         """
         清理AI智能体管理器
@@ -39,11 +39,10 @@ class AgentInitializer:
         try:
             if not self._initialized:
                 return
-                
             await agent_manager.close()
             self._initialized = False
             logger.info("AI智能体管理器已关闭")
-            
+
         except Exception as e:
             logger.error(f"关闭AI智能体管理器时发生错误: {e}")
 
@@ -60,7 +59,7 @@ def init_agent():
         if not settings.AI_AGENT_ENABLE:
             logger.info("AI智能体功能未启用")
             return True
-        
+
         # 在新的事件循环中初始化AI智能体管理器
         def run_init():
             loop = asyncio.new_event_loop()
@@ -77,13 +76,13 @@ def init_agent():
                 return False
             finally:
                 loop.close()
-        
+
         # 在后台线程中初始化
         init_thread = threading.Thread(target=run_init, daemon=True)
         init_thread.start()
-        
+
         return True
-        
+
     except Exception as e:
         logger.error(f"初始化AI智能体时发生错误: {e}")
         return False