refactor(pay): 重构 FiuuReturnController 中的 skey 计算逻辑

KKSU

2025-02-08 b116b2b304a6aff67a41e9fdcb89967afef194f8

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

@@ -20,4 +20,6 @@
    private String expressNo;

    private String expressCom;

    private String expressCode;
}