fix(purchase): 修复采购退货审核权限验证逻辑

- 修正了用户采购组权限验证条件，添加否定操作符
- 确保只有相同采购组的用户才能审核对应的退货申请单
- 防止跨采购组的不当审核操作

nflg-wms-admin/src/main/java/com/nflg/wms/admin/controller/PurchaseReturnController.java

@@ -223,7 +223,7 @@ public class PurchaseReturnController extends BaseController {
         VUtil.trueThrowBusinessError(ObjectUtil.isNull(returnRequest))
                 .throwMessage("无效申请单");
         User user = userService.getById(UserUtil.getUserId());
-        VUtil.trueThrowBusinessError(StrUtil.equals(user.getPurchasingGroup(), returnRequest.getPurchaseGroup()))
+        VUtil.trueThrowBusinessError(!StrUtil.equals(user.getPurchasingGroup(), returnRequest.getPurchaseGroup()))
                 .throwMessage("无权限审核此单");
 //        VUtil.trueThrowBusinessError(returnRequest.getApprovalStatus() == 1)
 //                .throwMessage("此单已审核通过，不可以再此审核");