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Add progressive web app companion for cross-platform access

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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>
This commit is contained in:
Ole-Morten Duesund 2026-03-08 17:41:38 +01:00
commit e8428de775
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pwa/node_modules/regenerate-unicode-properties/Script_Extensions/Hangul.js generated vendored Normal file
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const set = require('regenerate')(0x3037, 0x30FB);
set.addRange(0x1100, 0x11FF).addRange(0x3001, 0x3003).addRange(0x3008, 0x3011).addRange(0x3013, 0x301F).addRange(0x302E, 0x3030).addRange(0x3131, 0x318E).addRange(0x3200, 0x321E).addRange(0x3260, 0x327E).addRange(0xA960, 0xA97C).addRange(0xAC00, 0xD7A3).addRange(0xD7B0, 0xD7C6).addRange(0xD7CB, 0xD7FB).addRange(0xFE45, 0xFE46).addRange(0xFF61, 0xFF65).addRange(0xFFA0, 0xFFBE).addRange(0xFFC2, 0xFFC7).addRange(0xFFCA, 0xFFCF).addRange(0xFFD2, 0xFFD7).addRange(0xFFDA, 0xFFDC);
exports.characters = set;