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/loupe/lib/array.js

@@ -0,0 +1,16 @@
+import { inspectList, inspectProperty } from './helpers.js';
+export default function inspectArray(array, options) {
+    // Object.keys will always output the Array indices first, so we can slice by
+    // `array.length` to get non-index properties
+    const nonIndexProperties = Object.keys(array).slice(array.length);
+    if (!array.length && !nonIndexProperties.length)
+        return '[]';
+    options.truncate -= 4;
+    const listContents = inspectList(array, options);
+    options.truncate -= listContents.length;
+    let propertyContents = '';
+    if (nonIndexProperties.length) {
+        propertyContents = inspectList(nonIndexProperties.map(key => [key, array[key]]), options, inspectProperty);
+    }
+    return `[ ${listContents}${propertyContents ? `, ${propertyContents}` : ''} ]`;
+}