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-parameters/lib/shadow-utils.js

@@ -0,0 +1,64 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.buildScopeIIFE = buildScopeIIFE;
+exports.collectShadowedParamsNames = collectShadowedParamsNames;
+exports.iifeVisitor = void 0;
+var _core = require("@babel/core");
+const iifeVisitor = exports.iifeVisitor = {
+  "ReferencedIdentifier|BindingIdentifier"(path, state) {
+    const {
+      scope,
+      node
+    } = path;
+    const {
+      name
+    } = node;
+    if (name === "eval" || scope.getBinding(name) === state.scope.parent.getBinding(name) && state.scope.hasOwnBinding(name)) {
+      state.needsOuterBinding = true;
+      path.stop();
+    }
+  },
+  "TypeAnnotation|TSTypeAnnotation|TypeParameterDeclaration|TSTypeParameterDeclaration": path => path.skip()
+};
+function collectShadowedParamsNames(param, functionScope, shadowedParams) {
+  for (const name of Object.keys(param.getBindingIdentifiers())) {
+    var _functionScope$bindin;
+    const constantViolations = (_functionScope$bindin = functionScope.bindings[name]) == null ? void 0 : _functionScope$bindin.constantViolations;
+    if (constantViolations) {
+      for (const redeclarator of constantViolations) {
+        const node = redeclarator.node;
+        switch (node.type) {
+          case "VariableDeclarator":
+            {
+              if (node.init === null) {
+                const declaration = redeclarator.parentPath;
+                if (!declaration.parentPath.isFor() || declaration.parentPath.get("body") === declaration) {
+                  redeclarator.remove();
+                  break;
+                }
+              }
+              shadowedParams.add(name);
+              break;
+            }
+          case "FunctionDeclaration":
+            shadowedParams.add(name);
+            break;
+        }
+      }
+    }
+  }
+}
+function buildScopeIIFE(shadowedParams, body) {
+  const args = [];
+  const params = [];
+  for (const name of shadowedParams) {
+    args.push(_core.types.identifier(name));
+    params.push(_core.types.identifier(name));
+  }
+  return _core.types.returnStatement(_core.types.callExpression(_core.types.arrowFunctionExpression(params, body), args));
+}
+
+//# sourceMappingURL=shadow-utils.js.map