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/es-abstract/2024/AddEntriesFromIterable.js

@@ -0,0 +1,44 @@
+'use strict';
+
+var $TypeError = require('es-errors/type');
+var isObject = require('es-object-atoms/isObject');
+var inspect = require('object-inspect');
+
+var Call = require('./Call');
+var Get = require('./Get');
+var GetIterator = require('./GetIterator');
+var IsCallable = require('./IsCallable');
+var IteratorClose = require('./IteratorClose');
+var IteratorStep = require('./IteratorStep');
+var IteratorValue = require('./IteratorValue');
+var ThrowCompletion = require('./ThrowCompletion');
+
+// https://262.ecma-international.org/15.0/#sec-add-entries-from-iterable
+
+module.exports = function AddEntriesFromIterable(target, iterable, adder) {
+	if (!IsCallable(adder)) {
+		throw new $TypeError('Assertion failed: `adder` is not callable');
+	}
+	if (iterable == null) {
+		throw new $TypeError('Assertion failed: `iterable` is present, and not nullish');
+	}
+	var iteratorRecord = GetIterator(iterable, 'SYNC');
+	while (true) {
+		var next = IteratorStep(iteratorRecord);
+		if (!next) {
+			return target;
+		}
+		var nextItem = IteratorValue(next);
+		if (!isObject(nextItem)) {
+			var error = ThrowCompletion(new $TypeError('iterator next must return an Object, got ' + inspect(nextItem)));
+			return IteratorClose(iteratorRecord, error);
+		}
+		try {
+			var k = Get(nextItem, '0');
+			var v = Get(nextItem, '1');
+			Call(adder, target, [k, v]);
+		} catch (e) {
+			return IteratorClose(iteratorRecord, ThrowCompletion(e));
+		}
+	}
+};