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/vitest/dist/chunks/globals.D8ZVAdXd.js

@@ -0,0 +1,26 @@
+import { g as globalApis } from './constants.fzPh7AOq.js';
+import { V as VitestIndex } from './index.ckWaX2gY.js';
+import './vi.DgezovHB.js';
+import '@vitest/expect';
+import '@vitest/runner';
+import '@vitest/runner/utils';
+import 'chai';
+import './utils.C8RiOc4B.js';
+import '@vitest/utils';
+import './_commonjsHelpers.BFTU3MAI.js';
+import '@vitest/snapshot';
+import '@vitest/utils/error';
+import '@vitest/utils/source-map';
+import './date.W2xKR2qe.js';
+import '@vitest/spy';
+import './run-once.2ogXb3JV.js';
+import './benchmark.Cdu9hjj4.js';
+import 'expect-type';
+
+function registerApiGlobally() {
+  globalApis.forEach((api) => {
+    globalThis[api] = VitestIndex[api];
+  });
+}
+
+export { registerApiGlobally };