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/glob/dist/esm/has-magic.d.ts

@@ -0,0 +1,14 @@
+import { GlobOptions } from './glob.js';
+/**
+ * Return true if the patterns provided contain any magic glob characters,
+ * given the options provided.
+ *
+ * Brace expansion is not considered "magic" unless the `magicalBraces` option
+ * is set, as brace expansion just turns one string into an array of strings.
+ * So a pattern like `'x{a,b}y'` would return `false`, because `'xay'` and
+ * `'xby'` both do not contain any magic glob characters, and it's treated the
+ * same as if you had called it on `['xay', 'xby']`. When `magicalBraces:true`
+ * is in the options, brace expansion _is_ treated as a pattern having magic.
+ */
+export declare const hasMagic: (pattern: string | string[], options?: GlobOptions) => boolean;
+//# sourceMappingURL=has-magic.d.ts.map