Add progressive web app companion for cross-platform access

Vite + TypeScript PWA that mirrors the Android app's core features:
- Pre-processed shelter data (build-time UTM33N→WGS84 conversion)
- Leaflet map with shelter markers, user location, and offline tiles
- Canvas compass arrow (ported from DirectionArrowView.kt)
- IndexedDB shelter cache with 7-day staleness check
- Service worker with CacheFirst tiles and precached app shell
- i18n for en, nb, nn (ported from Android strings.xml)
- iOS/Android compass handling with low-pass filter
- Respects user map interaction (no auto-snap on pan/zoom)
- Build revision cache-breaker for reliable SW updates

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pwa/node_modules/fast-uri/benchmark/ws-is-secure.mjs

@@ -0,0 +1,65 @@
+import { Bench } from 'tinybench'
+import { wsIsSecure } from '../lib/schemes.js'
+
+const benchWsIsSecure = new Bench({ name: 'wsIsSecure' })
+
+const wsComponentAttributeSecureTrue = {
+  scheme: 'ws',
+  secure: true,
+}
+
+const wsComponentAttributeSecureFalse = {
+  scheme: 'ws',
+  secure: false,
+}
+
+const wssComponent = {
+  scheme: 'wss',
+}
+
+const wssComponentMixedCase = {
+  scheme: 'Wss',
+}
+
+const wssComponentUpperCase = {
+  scheme: 'WSS',
+}
+
+const httpComponent = {
+  scheme: 'http',
+}
+
+console.assert(wsIsSecure(wsComponentAttributeSecureTrue) === true, 'wsComponentAttributeSecureTrue should be secure')
+console.assert(wsIsSecure(wsComponentAttributeSecureFalse) === false, 'wsComponentAttributeSecureFalse should not be secure')
+console.assert(wsIsSecure(wssComponent) === true, 'wssComponent should be secure')
+console.assert(wsIsSecure(wssComponentMixedCase) === true, 'wssComponentMixedCase should be secure')
+console.assert(wsIsSecure(wssComponentUpperCase) === true, 'wssComponentUpperCase should be secure')
+console.assert(wsIsSecure(httpComponent) === false, 'httpComponent should not be secure')
+
+benchWsIsSecure.add(JSON.stringify(wsComponentAttributeSecureFalse), function () {
+  wsIsSecure(wsComponentAttributeSecureFalse)
+})
+
+benchWsIsSecure.add(JSON.stringify(wsComponentAttributeSecureTrue), function () {
+  wsIsSecure(wsComponentAttributeSecureTrue)
+})
+
+benchWsIsSecure.add(JSON.stringify(wssComponent), function () {
+  wsIsSecure(wssComponent)
+})
+
+benchWsIsSecure.add(JSON.stringify(wssComponentMixedCase), function () {
+  wsIsSecure(wssComponentMixedCase)
+})
+
+benchWsIsSecure.add(JSON.stringify(wssComponentUpperCase), function () {
+  wsIsSecure(wssComponentUpperCase)
+})
+
+benchWsIsSecure.add(JSON.stringify(httpComponent), function () {
+  wsIsSecure(httpComponent)
+})
+
+await benchWsIsSecure.run()
+console.log(benchWsIsSecure.name)
+console.table(benchWsIsSecure.table())