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-function-name/lib/index.js

@@ -0,0 +1,40 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _helperCompilationTargets = require("@babel/helper-compilation-targets");
+var _helperPluginUtils = require("@babel/helper-plugin-utils");
+var _default = exports.default = (0, _helperPluginUtils.declare)(api => {
+  api.assertVersion(7);
+  const supportUnicodeId = !(0, _helperCompilationTargets.isRequired)("transform-unicode-escapes", api.targets());
+  return {
+    name: "transform-function-name",
+    visitor: {
+      FunctionExpression: {
+        exit(path) {
+          if (path.key !== "value" && !path.parentPath.isObjectProperty()) {
+            {
+              var _path$ensureFunctionN;
+              (_path$ensureFunctionN = path.ensureFunctionName) != null ? _path$ensureFunctionN : path.ensureFunctionName = require("@babel/traverse").NodePath.prototype.ensureFunctionName;
+            }
+            path.ensureFunctionName(supportUnicodeId);
+          }
+        }
+      },
+      ObjectProperty(path) {
+        const value = path.get("value");
+        if (value.isFunction()) {
+          {
+            var _value$ensureFunction;
+            (_value$ensureFunction = value.ensureFunctionName) != null ? _value$ensureFunction : value.ensureFunctionName = require("@babel/traverse").NodePath.prototype.ensureFunctionName;
+          }
+          value.ensureFunctionName(supportUnicodeId);
+        }
+      }
+    }
+  };
+});
+
+//# sourceMappingURL=index.js.map