feat(payment): 集成 FIUU 支付方式并优化退款流程

KKSU

2025-02-06 dbdc1ed6a3ecdcb20981b9e84200c69424444d6d

 src/main/java/cc/mrbird/febs/mall/entity/MallGoodsCoupon.java

@@ -26,5 +26,4 @@
    //减免金额
    private BigDecimal realAmount;


}