fix: 处理null问题

buhuazhen

2026-06-01 facbfd2b1a0eb1ea971b699def8c85a43c5fa7fa

 src/main/java/com/ruoyi/sales/dto/ShippingInfoDto.java

@@ -29,4 +29,8 @@
    @TableField(exist = false)
    private List<CommonFile> commonFileList;

    private String  specificationModel;

    private String productName;

}