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/bindAll.js

@@ -0,0 +1,41 @@
+var arrayEach = require('./_arrayEach'),
+    baseAssignValue = require('./_baseAssignValue'),
+    bind = require('./bind'),
+    flatRest = require('./_flatRest'),
+    toKey = require('./_toKey');
+
+/**
+ * Binds methods of an object to the object itself, overwriting the existing
+ * method.
+ *
+ * **Note:** This method doesn't set the "length" property of bound functions.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {Object} object The object to bind and assign the bound methods to.
+ * @param {...(string|string[])} methodNames The object method names to bind.
+ * @returns {Object} Returns `object`.
+ * @example
+ *
+ * var view = {
+ *   'label': 'docs',
+ *   'click': function() {
+ *     console.log('clicked ' + this.label);
+ *   }
+ * };
+ *
+ * _.bindAll(view, ['click']);
+ * jQuery(element).on('click', view.click);
+ * // => Logs 'clicked docs' when clicked.
+ */
+var bindAll = flatRest(function(object, methodNames) {
+  arrayEach(methodNames, function(key) {
+    key = toKey(key);
+    baseAssignValue(object, key, bind(object[key], object));
+  });
+  return object;
+});
+
+module.exports = bindAll;