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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/Emoji_Modifier_Base.js generated vendored Normal file
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const set = require('regenerate')(0x261D, 0x26F9, 0x1F385, 0x1F3C7, 0x1F47C, 0x1F48F, 0x1F491, 0x1F4AA, 0x1F57A, 0x1F590, 0x1F6A3, 0x1F6C0, 0x1F6CC, 0x1F90C, 0x1F90F, 0x1F926, 0x1F977, 0x1F9BB);
set.addRange(0x270A, 0x270D).addRange(0x1F3C2, 0x1F3C4).addRange(0x1F3CA, 0x1F3CC).addRange(0x1F442, 0x1F443).addRange(0x1F446, 0x1F450).addRange(0x1F466, 0x1F478).addRange(0x1F481, 0x1F483).addRange(0x1F485, 0x1F487).addRange(0x1F574, 0x1F575).addRange(0x1F595, 0x1F596).addRange(0x1F645, 0x1F647).addRange(0x1F64B, 0x1F64F).addRange(0x1F6B4, 0x1F6B6).addRange(0x1F918, 0x1F91F).addRange(0x1F930, 0x1F939).addRange(0x1F93C, 0x1F93E).addRange(0x1F9B5, 0x1F9B6).addRange(0x1F9B8, 0x1F9B9).addRange(0x1F9CD, 0x1F9CF).addRange(0x1F9D1, 0x1F9DD).addRange(0x1FAC3, 0x1FAC5).addRange(0x1FAF0, 0x1FAF8);
exports.characters = set;