fix(staff): 修复班次重复校验逻辑

buhuazhen

2026-03-20 1e99f2e0b5bfb9182e17037c1b861476a20f8936

 src/main/java/com/ruoyi/purchase/service/IPurchaseLedgerService.java

@@ -43,4 +43,6 @@
    String getPurchaseNo();

    AjaxResult importData(MultipartFile file);

    PurchaseLedgerDto getPurchaseByCode(PurchaseLedgerDto purchaseLedgerDto);
}