优化代码，删除无效代码

plugins/game_task/main.py

@@ -4,7 +4,6 @@ from typing import Dict, Any, List, Optional, Tuple
 
 from loguru import logger
 
-from message_util import MessageUtil
 from plugin_common.message_plugin_interface import MessagePluginInterface
 from plugin_common.plugin_interface import PluginStatus
 from utils.decorator.plugin_decorators import plugin_stats_decorator
@@ -54,7 +53,6 @@ class GameTaskPlugin(MessagePluginInterface):
 
         # 保存上下文对象
         self.event_system = context.get("event_system")
-        self.message_util: MessageUtil = context.get("message_util")
 
         # 初始化配置
         self._commands = self._config.get("GameTask", {}).get("command",
@@ -117,7 +115,7 @@ class GameTaskPlugin(MessagePluginInterface):
         gbm: GroupBotManager = message.get("gbm")
         all_contacts = message.get("all_contacts", {})
 
-        self.bot = message.get("bot")
+        self.bot: WechatAPIClient = message.get("bot")
         self.LOG.debug(f"插件执行： {self.name}：{content}")
 
         # 检查权限
@@ -147,8 +145,8 @@ class GameTaskPlugin(MessagePluginInterface):
                 await self._handle_list_uncompleted_tasks(sender, roomid)
                 return True, "列举未完成任务成功"
             else:
-                self.message_util.send_text(f"❌未知命令！\n{self.command_format}",
-                                            (roomid if roomid else sender), sender)
+                await self.bot.send_at_message((roomid if roomid else sender), f"❌未知命令！\n{self.command_format}",
+                                               [sender])
                 return False, "未知命令"
 
         except Exception as e:
@@ -420,10 +418,10 @@ class GameTaskPlugin(MessagePluginInterface):
             for i, row in enumerate(ranks, 1):
                 rank_text += f"🐓 {i}. {row['player_name']}: {row['points']} 分\n"
 
-            self.message_util.send_text(
-                rank_text,
+            await self.bot.send_at_message(
                 (roomid if roomid else sender),
-                sender
+                rank_text,
+                [sender]
             )
         except Exception as e:
             self.LOG.error(f"显示排行榜出错: {e}")