Save audio board and get correct audio on switch shape works

.env

backend/src/index.php

boards-database/maps.sql

...de_modules/@fortawesome/free-solid-svg-icons/package.json

frontend/src/app/nav/nav.component.css

frontend/src/app/nav/nav.component.html

frontend/src/app/nav/nav.component.ts

frontend/src/app/recorder/recorder.component.html

frontend/src/app/recorder/recorder.component.ts

...hiteboard-page/boards-database/boards-database.service.ts

frontend/src/app/whiteboard-page/boards-database/utils.ts

...nd/src/app/whiteboard-page/whiteboard-page.component.html

...tend/src/app/whiteboard-page/whiteboard-page.component.ts