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-object-super/lib/index.js

@@ -0,0 +1,67 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _helperPluginUtils = require("@babel/helper-plugin-utils");
+var _helperReplaceSupers = require("@babel/helper-replace-supers");
+var _core = require("@babel/core");
+function replacePropertySuper(path, getObjectRef, file) {
+  const replaceSupers = new _helperReplaceSupers.default({
+    getObjectRef: getObjectRef,
+    methodPath: path,
+    file: file
+  });
+  replaceSupers.replace();
+}
+var _default = exports.default = (0, _helperPluginUtils.declare)(api => {
+  api.assertVersion(7);
+  const newLets = new Set();
+  return {
+    name: "transform-object-super",
+    visitor: {
+      Loop: {
+        exit(path) {
+          newLets.forEach(v => {
+            if (v.scopePath === path) {
+              path.scope.push({
+                id: v.id,
+                kind: "let"
+              });
+              path.scope.crawl();
+              path.requeue();
+              newLets.delete(v);
+            }
+          });
+        }
+      },
+      ObjectExpression(path, state) {
+        let objectRef;
+        const getObjectRef = () => objectRef = objectRef || path.scope.generateUidIdentifier("obj");
+        path.get("properties").forEach(propPath => {
+          if (!propPath.isMethod()) return;
+          replacePropertySuper(propPath, getObjectRef, state.file);
+        });
+        if (objectRef) {
+          const scopePath = path.findParent(p => p.isFunction() || p.isProgram() || p.isLoop());
+          const useLet = scopePath.isLoop();
+          if (useLet) {
+            newLets.add({
+              scopePath,
+              id: _core.types.cloneNode(objectRef)
+            });
+          } else {
+            path.scope.push({
+              id: _core.types.cloneNode(objectRef),
+              kind: "var"
+            });
+          }
+          path.replaceWith(_core.types.assignmentExpression("=", _core.types.cloneNode(objectRef), path.node));
+        }
+      }
+    }
+  };
+});
+
+//# sourceMappingURL=index.js.map