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/set-function-name/README.md

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+# set-function-name <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
+
+[![github actions][actions-image]][actions-url]
+[![coverage][codecov-image]][codecov-url]
+[![License][license-image]][license-url]
+[![Downloads][downloads-image]][downloads-url]
+
+[![npm badge][npm-badge-png]][package-url]
+
+Set a function’s name.
+
+Arguments:
+ - `fn`: the function
+ - `name`: the new name
+ - `loose`: Optional. If true, and the name fails to be set, do not throw. Default false.
+
+Returns `fn`.
+
+## Usage
+
+```javascript
+var setFunctionName = require('set-function-name');
+var assert = require('assert');
+
+const obj = {
+    concise() {},
+    arrow: () => {},
+    named: function named() {},
+    anon: function () {},
+};
+assert.equal(obj.concise.name, 'concise');
+assert.equal(obj.arrow.name, 'arrow');
+assert.equal(obj.named.name, 'named');
+assert.equal(obj.anon.name, 'anon');
+
+assert.equal(setFunctionName(obj.concise, 'brief'), obj.concise);
+assert.equal(setFunctionName(obj.arrow, 'pointy'), obj.arrow);
+assert.equal(setFunctionName(obj.named, ''), obj.named);
+assert.equal(setFunctionName(obj.anon, 'anonymous'), obj.anon);
+
+assert.equal(obj.concise.name, 'brief');
+assert.equal(obj.arrow.name, 'pointy');
+assert.equal(obj.named.name, '');
+assert.equal(obj.anon.name, 'anonymous');
+```
+
+[package-url]: https://npmjs.org/package/set-function-name
+[npm-version-svg]: https://versionbadg.es/ljharb/set-function-name.svg
+[deps-svg]: https://david-dm.org/ljharb/set-function-name.svg
+[deps-url]: https://david-dm.org/ljharb/set-function-name
+[dev-deps-svg]: https://david-dm.org/ljharb/set-function-name/dev-status.svg
+[dev-deps-url]: https://david-dm.org/ljharb/set-function-name#info=devDependencies
+[npm-badge-png]: https://nodei.co/npm/set-function-name.png?downloads=true&stars=true
+[license-image]: https://img.shields.io/npm/l/set-function-name.svg
+[license-url]: LICENSE
+[downloads-image]: https://img.shields.io/npm/dm/set-function-name.svg
+[downloads-url]: https://npm-stat.com/charts.html?package=set-function-name
+[codecov-image]: https://codecov.io/gh/ljharb/set-function-name/branch/main/graphs/badge.svg
+[codecov-url]: https://app.codecov.io/gh/ljharb/set-function-name/
+[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/ljharb/set-function-name
+[actions-url]: https://github.com/ljharb/set-function-name/actions