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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/leaflet.offline/examples/map-layers-and-control/index.html generated vendored Normal file
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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<link rel="icon" type="image/svg+xml" href="/vite.svg" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Vite + TS</title>
</head>
<body>
<div class="container">
<main id="app">
<h1>Map with layers & control</h1>
<p>
This maps shows the default
<a
href="https://github.com/allartk/leaflet.offline/blob/master/docs/api.md#new-tilelayeroffline"
target="_blank"
>layer</a
>
and control provided by leaflet.offline. Click the buttons on the left
side to download tiles from the visible area at zoom levels 13 & 16
(see the script). Enable the offline tiles layer to see what is
already offline available.
</p>
<p>
Total in database:
<span id="storage"></span> files
</p>
<div id="progress-wrapper">
<div class="">Download Progress</div>
<div class="flex-grow-1 ml-2 my-1">
<div id="progress" class="progress">
<div
id="progressbar"
role="progressbar"
style="width: 0%"
aria-valuenow="0"
aria-valuemin="0"
aria-valuemax="100"
></div>
</div>
</div>
</div>
<div id="map" style="height: 75vh"></div>
</main>
</div>
<script type="module" src="/src/main.ts"></script>
</body>
</html>