```

refactor(core): 优化DelFlag枚举值比较逻辑

- 修改DelFlag.getValue()调用为直接访问value字段
- 提升代码性能和可读性
```

openhis-server-new/openhis-application/src/main/java/com/openhis/web/basicmanage/controller/InvoiceController.java

@@ -1,5 +1,6 @@
 package com.openhis.web.basicmanage.controller;
 
+import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.core.common.core.domain.R;
 import com.core.common.utils.SecurityUtils;
@@ -48,6 +49,7 @@ public class InvoiceController {
         
         // 分页查询发票列表
         Page<Invoice> page = new Page<>(pageNo, pageSize);
-        return R.ok(invoiceService.selectInvoicePage(page, isAdmin, userId));
+        IPage<Invoice> result = invoiceService.selectInvoicePage(page, isAdmin, userId);
+        return R.ok(result);
     }
 }