支持微信支付宝独立支付渠道

backend/internal/modules/payment/refund.go

@@ -160,6 +160,8 @@ func (r *Repository) findOriginalPayment(ctx context.Context, orderID uint64) (m
 	}
 	return originalPayment, nil
 }
+
+// prepareRefundOrder 创建退款支付单，并继承原支付单回溯出的支付配置。
 func (r *Repository) prepareRefundOrder(ctx context.Context, originalPayment model.PaymentOrder, runtimeConfig runtimePaymentConfig, refundAmountCent int64, bizType string) (*model.PaymentOrder, bool, error) {
 	var paymentID uint64
 	existing := false
@@ -191,6 +193,7 @@ func (r *Repository) prepareRefundOrder(ctx context.Context, originalPayment mod
 			OrderID:         originalPayment.OrderID,
 			OrderNo:         originalPayment.OrderNo,
 			UserID:          originalPayment.UserID,
+			PaymentConfigID: runtimeConfig.ID,
 			Provider:        runtimeConfig.Provider,
 			MerchantID:      runtimeConfig.MerchantID,
 			ThirdOrderID:    merchantRefundID,