feat(mall): 添加 VIP购买相关接口和功能

KKSU

2024-12-16 b71d11796454bb3d844be6e00cfb4c877519870d

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

@@ -55,4 +55,7 @@

    @TableField(exist = false)
    private String unit;

    @TableField(exist = false)
    private BigDecimal itemAmount;
}