fix: 未设置会员价与商品价保持一致

src/main/java/com/chaozhanggui/system/cashierservice/service/ProductService.java

@@ -489,6 +489,10 @@ public class ProductService {
                     if (lowMemberPrice == null || lowMemberPrice.compareTo(item.getMemberPrice()) > 0) {
                         lowMemberPrice = item.getMemberPrice();
                     }
+
+                    if (item.getMemberPrice() == null || item.getMemberPrice().compareTo(BigDecimal.ZERO) <= 0) {
+                        item.setMealPrice(item.getSalePrice());
+                    }
                 }
                 // 销量
                 it.setStockNumber(sum.intValue());