如果客服描述为空，则转化为空字符串

src/main/java/com/qiqiim/webserver/user/controller/ImController.java

@@ -526,6 +526,9 @@ public class ImController extends BaseController {
         List<UserAdminInfoEntity> onlineList = new ArrayList<>();
         List<UserAdminInfoEntity> offlineList = new ArrayList<>();
         loop1:for (UserAdminInfoEntity userAdminInfoEntity : resultList) {
+            if(userAdminInfoEntity.getRemark() == null){
+                userAdminInfoEntity.setRemark("");
+            }
             for (Session session : sessions) {
                 if(Long.valueOf(session.getAccount()) == userAdminInfoEntity.getUid()) {
                     userAdminInfoEntity.setOnline(true);