Domus UI v1.2.1

v1.2.1 - Domus UI v1.2.1

This is a stable Domus UI release. Features explicitly marked Beta or
Coming later keep their documented limitations.

Fixed

• Domus UI now falls back to English when neither Home Assistant nor the
  browser uses a language it ships (for example German, Spanish, or Dutch).
  These installations previously opened the first-run setup and the whole
  interface in Italian. Italian and French keep their own translations, and a
  language chosen in Profile still takes precedence.

Project

• New presentation website, in Italian and English, built from the real
  Domus UI cards with demo-only data. It ships as a separate static build
  (npm run build:site) and is not part of the Home Assistant package.
• Added a "Support Domus UI" section to the README and a Sponsor button on the
  repository.

Validation

• Added unit coverage for browser-language detection and the English fallback.
• The release workflow verifies TypeScript, unit tests, production build,
  bundle budgets, dependency audit, Chromium end-to-end tests, HACS packaging,
  checksums, and generated English release notes.

Full Changelog: v1.2.0...v1.2.1