bugfix :: 방을 열고 > 닫았을 경우 unreadcount 쌓이지 않는 문제 수정.

projects/ucap-webmessenger-app/src/app/store/messenger/room/reducers.ts

@@ -8,6 +8,7 @@ import {
 } from './actions';
 
 import * as AuthenticationStore from '@app/store/account/authentication';
+import * as ChatStore from '@app/store/messenger/chat';
 import { UserInfo } from '@ucap-webmessenger/protocol-room';
 
 export const reducer = createReducer(
@@ -67,5 +68,10 @@ export const reducer = createReducer(
     return {
       ...initialState
     };
+  }),
+  on(ChatStore.clearSelectedRoom, (state, action) => {
+    return {
+      ...initialState
+    };
   })
 );