- Added PWA-related files: LICENSE, favicon.ico, icon-192.png, icon-512.png, manifest.json, service-worker.js in public/
- Deleted legacy favicon.svg
- Major update to src/pages/index.astro: implements full responsive UI, PWA manifest, service worker registration, and touch/mobile optimizations
- Added/updated .gitea to track current Gitea issue for workflow compliance
Purpose: Implements PWA support and refactors the main page for the Astro app, aligning with the migration and refactor described in issue #1.
Refs #1
