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/@babel/plugin-transform-private-methods/lib/index.js

@@ -0,0 +1,22 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _helperPluginUtils = require("@babel/helper-plugin-utils");
+var _helperCreateClassFeaturesPlugin = require("@babel/helper-create-class-features-plugin");
+var _default = exports.default = (0, _helperPluginUtils.declare)((api, options) => {
+  api.assertVersion("^7.0.0-0 || ^8.0.0-0 || >8.0.0-alpha <8.0.0-beta");
+  return (0, _helperCreateClassFeaturesPlugin.createClassFeaturePlugin)({
+    name: "transform-private-methods",
+    api,
+    feature: _helperCreateClassFeaturesPlugin.FEATURES.privateMethods,
+    loose: options.loose,
+    manipulateOptions(opts, parserOpts) {
+      parserOpts.plugins.push("classPrivateMethods");
+    }
+  });
+});
+
+//# sourceMappingURL=index.js.map