fix(staff): 修复班次重复校验逻辑

buhuazhen

2026-03-20 1e99f2e0b5bfb9182e17037c1b861476a20f8936

 src/main/java/com/ruoyi/purchase/dto/PaymentLedgerDto.java

@@ -8,6 +8,8 @@
    // 供应商名称
    private String supplierName;

    private Long supplierId;

    // 开始日期
    private String startDate;