refactor: 提取用户信息获取逻辑到 util.NewSelfNodeMessage 函数，简化消息处理逻辑

util/message.go

@@ -0,0 +1,21 @@
+package util
+
+import (
+	"log"
+	"strconv"
+
+	"git.lxtend.com/qqbot/action"
+	"git.lxtend.com/qqbot/message"
+)
+
+func NewSelfNodeMessage() *message.NodeMessage {
+	loginAccountInfo, err := action.GetLoginAccountInfo()
+	if err != nil {
+		log.Println("GetLoginAccountInfo error:", err)
+		return nil
+	}
+	if loginAccountInfo == nil {
+		return nil
+	}
+	return &message.NodeMessage{Type: message.TypeNode, Data: message.NodeMessageData{UserID: strconv.FormatInt(int64(loginAccountInfo.Data.UserID), 10), Nickname: loginAccountInfo.Data.Nickname}}
+}