- manifest.webmanifest + apple/maskable PNG icons; relative paths so the
app works both at dev root and under /weather
- plain-JS service worker (sw.js) with notificationclick/push handlers and
an SW-mediated showNotification() path for native Android notifications
- src/lib/pwa.js bootstraps registration and routes alerts to the SW
- Every alert kind (storm/precip/heat/cold/uv/wind) is now a per-type
preference toggle in Settings; removed the old alertThresholds.thunderstorm
boolean in favor of notificationTypes.storm
- Store dedups native notifications per forecast day and fires best-effort
native notifications for newly-appeared alerts
- inline-assets keeps manifest/sw/icons in dist; deploy.yml uploads + verifies
all PWA files via WebDAV
