修复退款审核详情关联与空值展示

backend/api/internal/seed/mock.go

@@ -45,6 +45,15 @@ func MockData(database *gorm.DB) error {
 			return err
 		}
 
+		// 财务退款属于平台审核业务，Mock 审核人必须引用平台账号而不是气站账号。
+		if err := ensureMockRoot(tx, string(passwordHash)); err != nil {
+			return err
+		}
+		var rootAccount models.PlatformAccount
+		if err := tx.Where("username = ?", "root").First(&rootAccount).Error; err != nil {
+			return fmt.Errorf("find root platform account for mock refund: %w", err)
+		}
+
 		delivery := models.DeliveryBasic{
 			Entity: entity(3, common.StatusEnable), DeliveryCode: "MOCK-DELIVERY-001",
 			GasBasicID: gas.ID, Name: "和气示例配送点", Principal: "李主管",
@@ -394,11 +403,14 @@ func MockData(database *gorm.DB) error {
 			Entity: entity(37, common.StatusEnable), RefundStatus: 20, WalletBasicID: wallet.ID,
 			PaymentOrderID: walletPayment.ID, RefundNo: "MOCK-REFUND-001", RequestNo: "MOCK-REQ-REFUND-001",
 			BusinessType: "gasorder", BusinessIdentity: gasOrder.Identity, UserIdentity: user.Identity,
-			Amount: 1000, Reason: "模拟部分退款", ReviewerIdentity: gasAccount.Identity, ReviewedAt: &refundCompletedAt, CompletedAt: &refundCompletedAt,
+			Amount: 1000, Reason: "模拟部分退款", ReviewerIdentity: rootAccount.Identity, ReviewedAt: &refundCompletedAt, CompletedAt: &refundCompletedAt,
 		}
 		if err := put(tx, &refund); err != nil {
 			return err
 		}
+		if err := repairMockRefundReviewer(tx, refund.Identity, rootAccount.Identity); err != nil {
+			return err
+		}
 
 		applyCash := models.WalletApplyCash{
 			Entity: entity(38, common.StatusEnable), ApplyStatus: common.StatusApproved, WalletBasicID: wallet.ID, WalletBankID: bank.ID,
@@ -539,9 +551,6 @@ func MockData(database *gorm.DB) error {
 			return err
 		}
 
-		if err := ensureMockRoot(tx, string(passwordHash)); err != nil {
-			return err
-		}
 		var rootRole models.PlatformRole
 		if err := tx.Where("role_code = ?", "root").First(&rootRole).Error; err != nil {
 			return fmt.Errorf("find root role for mock menu: %w", err)
@@ -1005,6 +1014,35 @@ func ensureMockRoot(database *gorm.DB, passwordHash string) error {
 	return nil
 }
 
+// repairMockRefundReviewer 幂等修复历史 Mock 退款误关联气站账号的问题。
+func repairMockRefundReviewer(database *gorm.DB, refundIdentity string, reviewerIdentity string) error {
+	if refundIdentity == "" || reviewerIdentity == "" {
+		return errors.New("mock refund reviewer identity is missing")
+	}
+	result := database.Model(&models.PaymentRefund{}).
+		Where("identity = ?", refundIdentity).
+		Update("reviewer_identity", reviewerIdentity)
+	if result.Error != nil {
+		return fmt.Errorf("repair mock refund reviewer: %w", result.Error)
+	}
+	return nil
+}
+
+// RepairMockRefundReviewer 仅修复固定 Mock 退款，不触发其他模拟资源写入。
+func RepairMockRefundReviewer(database *gorm.DB) (int64, error) {
+	var rootAccount models.PlatformAccount
+	if err := database.Where("username = ?", "root").First(&rootAccount).Error; err != nil {
+		return 0, fmt.Errorf("find root platform account for mock refund: %w", err)
+	}
+	result := database.Model(&models.PaymentRefund{}).
+		Where("identity = ? AND refund_no = ?", entity(37, common.StatusEnable).Identity, "MOCK-REFUND-001").
+		Update("reviewer_identity", rootAccount.Identity)
+	if result.Error != nil {
+		return 0, fmt.Errorf("repair mock refund reviewer: %w", result.Error)
+	}
+	return result.RowsAffected, nil
+}
+
 func entity(sequence int, status int) models.Entity {
 	return models.Entity{
 		Identity: fmt.Sprintf("%s%012d", mockIdentityPrefix, sequence),