[refactor] 更新 InfoUtils.get_user_nickname 方法，添加 config_manager 参数以支持群名片配置

src/visualization/activity_charts.py

@@ -30,7 +30,7 @@ class ActivityVisualizer:
             # # 用户分析
             # sender = msg.get("sender", {})
             # user_id = str(sender.get("user_id", ""))
-            # nickname = InfoUtils.get_user_nickname(sender)
+            # nickname = InfoUtils.get_user_nickname(self.config_manager, sender)
 
             # 统计每小时消息数
             hourly_activity[hour] += 1