看板内容进行优化，同时加入了用户管理模块，将用户信息全局开放，

utils/wechat/contact_manager.py

@@ -0,0 +1,79 @@
+# -*- coding: utf-8 -*-
+"""
+联系人管理器 - 提供全局访问联系人信息的单例类
+"""
+import logging
+from typing import Dict, Optional
+
+
+class ContactManager:
+    """联系人管理器单例类"""
+    _instance = None
+    _contacts: Dict[str, str] = {}
+    _initialized = False
+    _logger = logging.getLogger("ContactManager")
+
+    def __new__(cls):
+        if cls._instance is None:
+            cls._instance = super(ContactManager, cls).__new__(cls)
+        return cls._instance
+
+    def __init__(self):
+        # 确保初始化代码只执行一次
+        if not ContactManager._initialized:
+            self._logger.info("初始化联系人管理器")
+            ContactManager._initialized = True
+
+    @classmethod
+    def get_instance(cls):
+        """获取单例实例"""
+        if cls._instance is None:
+            cls._instance = ContactManager()
+        return cls._instance
+
+    def set_contacts(self, contacts: Dict[str, str]) -> None:
+        """设置联系人字典
+        
+        Args:
+            contacts: 联系人字典，格式为 {"wxid": "NickName"}
+        """
+        self._contacts = contacts
+        self._logger.info(f"联系人信息已更新，共 {len(contacts)} 个联系人")
+
+    def get_contacts(self) -> Dict[str, str]:
+        """获取所有联系人
+        
+        Returns:
+            联系人字典，格式为 {"wxid": "NickName"}
+        """
+        return self._contacts
+
+    def get_nickname(self, wxid: str) -> str:
+        """根据微信ID获取昵称
+        
+        Args:
+            wxid: 微信ID
+            
+        Returns:
+            对应的昵称，如果不存在则返回wxid本身
+        """
+        return self._contacts.get(wxid, wxid)
+
+    def update_contact(self, wxid: str, nickname: str) -> None:
+        """更新单个联系人信息
+        
+        Args:
+            wxid: 微信ID
+            nickname: 昵称
+        """
+        self._contacts[wxid] = nickname
+        self._logger.debug(f"已更新联系人: {wxid} -> {nickname}")
+
+    def refresh_contacts(self, new_contacts: Dict[str, str]) -> None:
+        """刷新联系人信息
+        
+        Args:
+            new_contacts: 新的联系人字典
+        """
+        self._contacts = new_contacts
+        self._logger.info(f"联系人信息已刷新，共 {len(new_contacts)} 个联系人")