fix: Ruff

src/plugins/PFC/pfc.py

@@ -371,7 +371,7 @@ class DirectMessageSender:
         # 处理消息
         await message.process()
 
-        message_json = message.to_dict()
+        _message_json = message.to_dict()
 
         # 发送消息
         try:

src/plugins/heartFC_chat/heartFC_chat.py

@@ -1,7 +1,7 @@
 import asyncio
 import time
 import traceback
-from typing import List, Optional, Dict, Any, Set, Deque
+from typing import List, Optional, Dict, Any, Deque
 from collections import deque
 from src.plugins.chat.message import MessageRecv, BaseMessageInfo, MessageThinking, MessageSending
 from src.plugins.chat.message import MessageSet, Seg  # Local import needed after move

src/plugins/heartFC_chat/heartFC_generator.py

@@ -49,7 +49,7 @@ class HeartFCGenerator:
 
         arousal_multiplier = MoodManager.get_instance().get_arousal_multiplier()
 
-        with Timer() as t_generate_response:
+        with Timer() as _generate_response:
             current_model = self.model_normal
             current_model.temperature = global_config.llm_normal["temp"] * arousal_multiplier  # 激活度越高，温度越高
             model_response = await self._generate_response_with_model(