feat: portal tenant apply flow

backend/app/services/tenant.go

@@ -842,6 +842,19 @@ func (t *tenant) FindByCode(ctx context.Context, code string) (*models.Tenant, e
 	return &m, nil
 }
 
+// FindOwnedByUserID 查询用户创建/拥有的租户（一个用户仅允许拥有一个租户）。
+func (t *tenant) FindOwnedByUserID(ctx context.Context, userID int64) (*models.Tenant, error) {
+	if userID <= 0 {
+		return nil, errors.New("user_id must be > 0")
+	}
+	tbl, query := models.TenantQuery.QueryContext(ctx)
+	m, err := query.Where(tbl.UserID.Eq(userID)).Order(tbl.ID.Desc()).First()
+	if err != nil {
+		return nil, errors.Wrapf(err, "find owned tenant failed, user_id: %d", userID)
+	}
+	return m, nil
+}
+
 func (t *tenant) FindTenantUser(ctx context.Context, tenantID, userID int64) (*models.TenantUser, error) {
 	logrus.WithField("tenant_id", tenantID).WithField("user_id", userID).Info("find tenant user")
 	tbl, query := models.TenantUserQuery.QueryContext(ctx)

backend/app/services/tenant_join_test.go

@@ -52,10 +52,10 @@ func (s *TenantJoinTestSuite) truncateAll(ctx context.Context) {
 	), ShouldBeNil)
 }
 
-func (s *TenantJoinTestSuite) seedInvite(ctx context.Context, tenantID, creatorUserID int64, code string, status consts.TenantInviteStatus, maxUses, usedCount int32, expiresAt time.Time) *models.TenantInvite {
+func (s *TenantJoinTestSuite) seedInvite(ctx context.Context, tenantID, inviterUserID int64, code string, status consts.TenantInviteStatus, maxUses, usedCount int32, expiresAt time.Time) *models.TenantInvite {
 	inv := &models.TenantInvite{
 		TenantID:  tenantID,
-		UserID:    creatorUserID,
+		UserID:    inviterUserID,
 		Code:      code,
 		Status:    status,
 		MaxUses:   maxUses,