refactor: 在 getMyBLPic 函数中优化用户ID获取逻辑，支持从消息中提取用户ID，提升代码灵活性

handler/beatleader/beatleader.go

@@ -173,7 +173,13 @@ func getMyBLPic(msg model.Message) (reply *model.Reply) {
 		attempts   = 0
 	)
 
-	userIdStr := strconv.Itoa(int(msg.UserId))
+	tokens := util.SplitN(msg.RawMsg, 2)
+	var userIdStr string
+	if len(tokens) == 2 {
+		userIdStr = tokens[1]
+	} else {
+		userIdStr = strconv.Itoa(int(msg.UserId))
+	}
 	var data *beatleader.PlayerDataLite
 	var lastData *beatleader.PlayerDataLite
 	for attempts < maxRetries {