代码规范过滤，移除冗余代码，替换掉不推荐的包

server/internal/controller/admin/admin/monitor.go

@@ -61,7 +61,7 @@ func (c *cMonitor) OnlineList(ctx context.Context, req *monitor.OnlineListReq) (
 		return
 	}
 
-	for conn, _ := range c.wsManager.GetClients() {
+	for conn := range c.wsManager.GetClients() {
 		if conn.SendClose || conn.User == nil {
 			continue
 		}

server/internal/controller/admin/admin/notice.go

@@ -143,11 +143,11 @@ func (c *cNotice) Letter(ctx context.Context, req *notice.EditLetterReq) (res *n
 func (c *cNotice) UpRead(ctx context.Context, req *notice.UpReadReq) (res *notice.UpReadRes, err error) {
 	var in adminin.NoticeUpReadInp
 	if err = gconv.Scan(req, &in); err != nil {
-		return nil, err
+		return
 	}
 
 	err = service.AdminNotice().UpRead(ctx, in)
-	return res, nil
+	return
 }
 
 // PullMessages 拉取未读消息列表