- Add PWAInstallPrompt component for custom install UI and event handling
- Register PWAInstallPrompt in App.vue for global visibility
- Enable PWA features and install prompt in dev, test, and prod (vite.config.web.mts)
- Update service worker registration to work in all environments
- Update docs/build-web-script-integration.md with PWA install guidance and visual cues
- Add scripts/build-web.sh for unified web build/dev workflow
PWA is now installable and testable in all web environments, with clear user prompts and desktop support.