display mail in iframe, add design for thread and unseen

front/src/views/sidebar/rooms/Rooms.vue

@@ -1,5 +1,5 @@
 <template>
-    <div>
+    <div class="test">
       <Room v-for="(room, index) in rooms()" :key="index" :data="room" />
     </div>
 </template>
@@ -23,10 +23,11 @@ export default {
 </script>
 
 <style scoped>
-div {
+.test {
   display: flex;
   flex-direction: column;
   background-color: #24242B;
+  overflow: auto;
 }
 
 </style>