feat:优化屎山

plugins/ZImageTurbo/main.py

@@ -345,7 +345,7 @@ class ZImageTurbo(PluginBase):
     async def execute_llm_tool(self, tool_name: str, arguments: dict, bot: WechatHookClient, from_wxid: str) -> dict:
         """执行LLM工具调用，供AIChat插件调用"""
         if tool_name != "generate_image":
-            return {"success": False, "message": "未知的工具名称"}
+            return None
 
         try:
             prompt = arguments.get("prompt", "")