清除临时文件，防止重复处理。

plugins/kid_photo_extractor/main.py

@@ -10,6 +10,7 @@ import traceback
 
 from wcferry import Wcf
 
+from db.connection import DBConnectionManager
 from plugin_common.plugin_interface import PluginStatus
 
 try:
@@ -328,7 +329,7 @@ class KidPhotoExtractorPlugin(MessagePluginInterface):
         self.wcf = context.get("wcf")
         self.event_system = context.get("event_system")
         self.message_util = context.get("message_util")
-        self.db_manager = context.get("db_manager")
+        self.db_manager = DBConnectionManager.get_instance()
 
         # 初始化数据库
         if self.db_manager:
@@ -746,6 +747,9 @@ class KidPhotoExtractorPlugin(MessagePluginInterface):
             self.LOG.error(traceback.format_exc())
             wcf.send_text(f"❌分析过程中出错: {str(e)}", target, sender)
         finally:
+            # 清理所有临时文件
+            self._cleanup_temp_files(temp_files)
+            
             # 标记任务完成
             self.analysis_tasks[group_key]["running"] = False