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/_isLaziable.js

@@ -0,0 +1,28 @@
+var LazyWrapper = require('./_LazyWrapper'),
+    getData = require('./_getData'),
+    getFuncName = require('./_getFuncName'),
+    lodash = require('./wrapperLodash');
+
+/**
+ * Checks if `func` has a lazy counterpart.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
+ *  else `false`.
+ */
+function isLaziable(func) {
+  var funcName = getFuncName(func),
+      other = lodash[funcName];
+
+  if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
+    return false;
+  }
+  if (func === other) {
+    return true;
+  }
+  var data = getData(other);
+  return !!data && func === data[0];
+}
+
+module.exports = isLaziable;