add button to set seen flag on front

front/src/views/room/RoomView.vue

@@ -47,6 +47,8 @@ function openMessageView(id) {
                     :key="index"
                     :msg="message"
                     :members="room?.members"
+                    :mailboxId="room.mailboxId"
+                    :roomId="room.id"
                     @open-message-view="(id) => openMessageView(id)"
                 />
             </div>