fix: page index 누락 수정 (#178)

- merge 과정 중 page index 누락된 부분 수정

Author: Do-ho

client/src/pages/index.ts

@@ -5,4 +5,4 @@ import { Thread } from './Chatroom/Thread';
 import { LoginLoading } from './LoginLoading';
 import { ChannelBrowser } from './ChannelBrowser/ChannelBrowser';
 
-export { Chatroom, Login, LoginLoading, ChannelBrowser, Thread };
+export { Chatroom, Login, LoginLoading, ChannelBrowser, Thread, ChatroomThread };