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/async/log.js

@@ -0,0 +1,41 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+
+var _consoleFunc = require('./internal/consoleFunc.js');
+
+var _consoleFunc2 = _interopRequireDefault(_consoleFunc);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * Logs the result of an `async` function to the `console`. Only works in
+ * Node.js or in browsers that support `console.log` and `console.error` (such
+ * as FF and Chrome). If multiple arguments are returned from the async
+ * function, `console.log` is called on each argument in order.
+ *
+ * @name log
+ * @static
+ * @memberOf module:Utils
+ * @method
+ * @category Util
+ * @param {AsyncFunction} function - The function you want to eventually apply
+ * all arguments to.
+ * @param {...*} arguments... - Any number of arguments to apply to the function.
+ * @example
+ *
+ * // in a module
+ * var hello = function(name, callback) {
+ *     setTimeout(function() {
+ *         callback(null, 'hello ' + name);
+ *     }, 1000);
+ * };
+ *
+ * // in the node repl
+ * node> async.log(hello, 'world');
+ * 'hello world'
+ */
+exports.default = (0, _consoleFunc2.default)('log');
+module.exports = exports.default;