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-new-target/lib/index.js

@@ -0,0 +1,71 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _helperPluginUtils = require("@babel/helper-plugin-utils");
+var _core = require("@babel/core");
+var _default = exports.default = (0, _helperPluginUtils.declare)(api => {
+  api.assertVersion(7);
+  return {
+    name: "transform-new-target",
+    visitor: {
+      MetaProperty(path) {
+        const meta = path.get("meta");
+        const property = path.get("property");
+        const {
+          scope
+        } = path;
+        if (meta.isIdentifier({
+          name: "new"
+        }) && property.isIdentifier({
+          name: "target"
+        })) {
+          const func = path.findParent(path => {
+            if (path.isClass()) return true;
+            if (path.isFunction() && !path.isArrowFunctionExpression()) {
+              if (path.isClassMethod({
+                kind: "constructor"
+              })) {
+                return false;
+              }
+              return true;
+            }
+            return false;
+          });
+          if (!func) {
+            throw path.buildCodeFrameError("new.target must be under a (non-arrow) function or a class.");
+          }
+          const {
+            node
+          } = func;
+          if (_core.types.isMethod(node)) {
+            path.replaceWith(scope.buildUndefinedNode());
+            return;
+          }
+          const constructor = _core.types.memberExpression(_core.types.thisExpression(), _core.types.identifier("constructor"));
+          if (func.isClass()) {
+            path.replaceWith(constructor);
+            return;
+          }
+          if (!node.id) {
+            node.id = scope.generateUidIdentifier("target");
+          } else {
+            let scope = path.scope;
+            const name = node.id.name;
+            while (scope !== func.parentPath.scope) {
+              if (scope.hasOwnBinding(name) && !scope.bindingIdentifierEquals(name, node.id)) {
+                scope.rename(name);
+              }
+              scope = scope.parent;
+            }
+          }
+          path.replaceWith(_core.types.conditionalExpression(_core.types.binaryExpression("instanceof", _core.types.thisExpression(), _core.types.cloneNode(node.id)), constructor, scope.buildUndefinedNode()));
+        }
+      }
+    }
+  };
+});
+
+//# sourceMappingURL=index.js.map