修改c端获取课题列表的接口

app/JsonRpc/ChatService.php

@@ -870,7 +870,7 @@ class ChatService implements ChatServiceInterface
                 DB::raw('count(chat_topics_reply.id) as num')
             )
             ->groupBy('chat_topics.id')
-            ->orderBy('chat_topics.id', 'desc')
+            ->orderBy('chat_topics.updated_at', 'desc')
             ->paginate($data['page_size'], ['*'], 'page', $data['page'] ?? 1);
         return Result::success($result);
     }