fix: 处理空值计算，确保待来票金额与未来票金额一致

gongchunyi

2026-01-16 79a570ae5f497e30337e7dd002450072e1b21cc2

 src/main/java/com/ruoyi/purchase/mapper/ProductRecordMapper.java

@@ -17,4 +17,6 @@
public interface ProductRecordMapper extends BaseMapper<ProductRecord> {

    IPage<ProductRecordDto> productRecordPage(Page page, @Param("c") TicketRegistrationDto ticketRegistrationDto);

    ProductRecordDto getProductRecordById(Long id);
}