优化仲裁

backend/internal/modules/order/checkout_finalize.go

@@ -43,6 +43,7 @@ func (r *Repository) finalizeCheckout(tx *gorm.DB, order *model.RentalOrder, che
 	order.ActualCoinConsumedM = settlement.CoinConsumedM
 	order.ActualPureCoinAmountCent = settlement.PureCoinAmountCent
 	order.ActualPureCoinDiscountCent = settlement.PureCoinDiscountCent
+	order.ActualExtraItemAmountCent = settlement.ExtraItemAmountCent
 	if err := appendCheckoutCompletedNotifications(tx, order, renterContent); err != nil {
 		return nil, err
 	}