feat: add manual save button for player name and update UI interactions

public/js/dom.js

@@ -29,6 +29,7 @@ export const $volumeSlider = el('volumeSlider');
 export const $bufferBadge = el('bufferBadge');
 export const $copyRoomCode = el('copyRoomCode');
 export const $nameLobby = el('name');
+export const $saveName = el('saveName');
 export const $createRoom = el('createRoom');
 export const $joinRoom = el('joinRoom');
 export const $roomCode = el('roomCode');