feat 会话顺序

hs-im-server/im-service/src/main/java/com/lld/im/service/message/service/MessageSyncService.java

@@ -268,7 +268,7 @@ public class MessageSyncService {
         sessionVos.sort(new Comparator<ImMessageHistoryVo>() {
             @Override
             public int compare(ImMessageHistoryVo o1, ImMessageHistoryVo o2) {
-                return o1.getCreateTime().compareTo(o2.getCreateTime());
+                return o2.getCreateTime().compareTo(o1.getCreateTime());
             }
         });
         return sessionVos;