fix: 修改多个处理函数的返回类型为指针类型，以提高内存使用效率并避免不必要的拷贝

auth/auth.go

@@ -39,20 +39,16 @@ func SetPermission(qqID int64, level constants.PermissionLevel) error {
 	return setAuth(auth)
 }
 
-func TryExecHandler(msg model.Message, level constants.PermissionLevel, handler model.Handler) (reply model.Reply) {
+func TryExecHandler(msg model.Message, level constants.PermissionLevel, handler model.Handler) (reply *model.Reply) {
 	if permission, err := getAuth(msg.UserId); err == nil {
 		if permission.Role == constants.LEVEL_IGNORE {
-			return model.Reply{
-				ReplyMsg:       "",
-				ReferOriginMsg: false,
-				FromMsg:        msg,
-			}
+			return nil
 		}
 	}
 	if HasPermission(msg.UserId, level) {
 		return handler(msg)
 	}
-	return model.Reply{
+	return &model.Reply{
 		ReplyMsg:       "权限校验错误",
 		ReferOriginMsg: true,
 		FromMsg:        msg,