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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/Binary_Property/Noncharacter_Code_Point.js generated vendored Normal file
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const set = require('regenerate')();
set.addRange(0xFDD0, 0xFDEF).addRange(0xFFFE, 0xFFFF).addRange(0x1FFFE, 0x1FFFF).addRange(0x2FFFE, 0x2FFFF).addRange(0x3FFFE, 0x3FFFF).addRange(0x4FFFE, 0x4FFFF).addRange(0x5FFFE, 0x5FFFF).addRange(0x6FFFE, 0x6FFFF).addRange(0x7FFFE, 0x7FFFF).addRange(0x8FFFE, 0x8FFFF).addRange(0x9FFFE, 0x9FFFF).addRange(0xAFFFE, 0xAFFFF).addRange(0xBFFFE, 0xBFFFF).addRange(0xCFFFE, 0xCFFFF).addRange(0xDFFFE, 0xDFFFF).addRange(0xEFFFE, 0xEFFFF).addRange(0xFFFFE, 0xFFFFF).addRange(0x10FFFE, 0x10FFFF);
exports.characters = set;