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/lodash/_baseMatches.js

@@ -0,0 +1,22 @@
+var baseIsMatch = require('./_baseIsMatch'),
+    getMatchData = require('./_getMatchData'),
+    matchesStrictComparable = require('./_matchesStrictComparable');
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+module.exports = baseMatches;