This Angular-based demo app, built with Daily's Client SDK for JavaScript, supports multi-participant calls and features a fully customized user interface. The app has two main views: a home page with a form to join the call and an in-call view. The join form accepts user name and room URL, while the in-call view displays video tiles for each participant, allowing them to turn their media on/off and leave the call. An error screen is displayed for errors, and a chat component allows participants to send text-based messages to each other during the call. The app's components are structured with a root component (`app-root`) that parents all other components, including `app-daily-container`, `join-form`, `app-call`, `video-tile`, and `error-message`.