fix(statistics):修正支付订单金额获取字段

- 将支付订单金额来源从 totalAmount 更改为 payOrderAmount
- 保证金额统计准确性- 避免因字段不一致导致的数据错误

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/business/service/impl/StatisticsServiceImpl.java

@@ -120,7 +120,7 @@ public class StatisticsServiceImpl implements IStatisticsService {
             if (index != null) {
                 // 确保计数为非空值
                 int count = payOrderVo.getPayOrderCount() != null ? payOrderVo.getPayOrderCount() : 0;
-                BigDecimal amount = payOrderVo.getTotalAmount() != null ? payOrderVo.getTotalAmount() : BigDecimal.ZERO;
+                BigDecimal amount = payOrderVo.getPayOrderAmount() != null ? payOrderVo.getPayOrderAmount() : BigDecimal.ZERO;
 
                 payOrderCountIds.set(index, count);
                 payOrderAmountIds.set(index, amount);