fix: 设备数限制

wfc-modules/wfc-user/src/main/java/org/wfc/user/service/impl/UAccountServiceImpl.java

@@ -284,7 +284,7 @@ public class UAccountServiceImpl extends ServiceImpl<UAccountMapper, UAccount> i
                             continue;
                         }
                         int limitNum = currentClients.size() - account.getClientNum();
-                        List<UClientCurrentVo> cancelClients = currentClients.stream().sorted(Comparator.comparing(UClientCurrentVo::getUpTime))
+                        List<UClientCurrentVo> cancelClients = currentClients.stream().sorted(Comparator.comparing(UClientCurrentVo::getUpTime).reversed())
                                 .limit(limitNum).collect(Collectors.toList());
                         for (UClientCurrentVo cancelClient : cancelClients) {
                             wifiApi.cancelAuthClient(cancelClient.getSiteId(), cancelClient.getClientMac());