feat(api): add referral percentage and only first purchase fields to user model and requests

internal/logic/admin/user/getUserListLogic.go

@@ -41,20 +41,20 @@ func (l *GetUserListLogic) GetUserList(req *types.GetUserListRequest) (*types.Ge
 	userRespList := make([]types.User, 0, len(list))
 
 	for _, item := range list {
-		var user types.User
-		tool.DeepCopy(&user, item)
+		var u types.User
+		tool.DeepCopy(&u, item)
 
 		// 处理 AuthMethods
-		authMethods := make([]types.UserAuthMethod, len(user.AuthMethods)) // 直接创建目标 slice
-		for i, method := range user.AuthMethods {
+		authMethods := make([]types.UserAuthMethod, len(u.AuthMethods)) // 直接创建目标 slice
+		for i, method := range u.AuthMethods {
 			tool.DeepCopy(&authMethods[i], method)
 			if method.AuthType == "mobile" {
 				authMethods[i].AuthIdentifier = phone.FormatToInternational(method.AuthIdentifier)
 			}
 		}
-		user.AuthMethods = authMethods
+		u.AuthMethods = authMethods
 
-		userRespList = append(userRespList, user)
+		userRespList = append(userRespList, u)
 	}
 
 	return &types.GetUserListResponse{