[P3] PWA support #24
Description
Problem
As a tracking app, BloomWatch would benefit from installability. PWA is low effort and high perceived value.
Requirements
- Add Angular service worker (
@angular/pwa) - Configure manifest.json with app name, theme colors, icons
- Cache shell and static assets for offline shell access
- Push notification groundwork (optional, for future notification system)
Acceptance Criteria
- App is installable on mobile and desktop
- Installed app shows the BloomWatch icon and splash screen
- Static shell loads offline (data requires connectivity)
- Lighthouse PWA audit passes
References
- Roadmap §10 — Growth Features