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/traverse/lib/index.js

@@ -0,0 +1,87 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+Object.defineProperty(exports, "Hub", {
+  enumerable: true,
+  get: function () {
+    return _hub.default;
+  }
+});
+Object.defineProperty(exports, "NodePath", {
+  enumerable: true,
+  get: function () {
+    return _index.default;
+  }
+});
+Object.defineProperty(exports, "Scope", {
+  enumerable: true,
+  get: function () {
+    return _index2.default;
+  }
+});
+exports.visitors = exports.default = void 0;
+require("./path/context.js");
+var visitors = require("./visitors.js");
+exports.visitors = visitors;
+var _t = require("@babel/types");
+var cache = require("./cache.js");
+var _traverseNode = require("./traverse-node.js");
+var _index = require("./path/index.js");
+var _index2 = require("./scope/index.js");
+var _hub = require("./hub.js");
+const {
+  VISITOR_KEYS,
+  removeProperties,
+  traverseFast
+} = _t;
+function traverse(parent, opts = {}, scope, state, parentPath, visitSelf) {
+  if (!parent) return;
+  if (!opts.noScope && !scope) {
+    if (parent.type !== "Program" && parent.type !== "File") {
+      throw new Error("You must pass a scope and parentPath unless traversing a Program/File. " + `Instead of that you tried to traverse a ${parent.type} node without ` + "passing scope and parentPath.");
+    }
+  }
+  if (!parentPath && visitSelf) {
+    throw new Error("visitSelf can only be used when providing a NodePath.");
+  }
+  if (!VISITOR_KEYS[parent.type]) {
+    return;
+  }
+  visitors.explode(opts);
+  (0, _traverseNode.traverseNode)(parent, opts, scope, state, parentPath, undefined, visitSelf);
+}
+var _default = exports.default = traverse;
+traverse.visitors = visitors;
+traverse.verify = visitors.verify;
+traverse.explode = visitors.explode;
+traverse.cheap = function (node, enter) {
+  traverseFast(node, enter);
+  return;
+};
+traverse.node = function (node, opts, scope, state, path, skipKeys) {
+  (0, _traverseNode.traverseNode)(node, opts, scope, state, path, skipKeys);
+};
+traverse.clearNode = function (node, opts) {
+  removeProperties(node, opts);
+};
+traverse.removeProperties = function (tree, opts) {
+  traverseFast(tree, traverse.clearNode, opts);
+  return tree;
+};
+traverse.hasType = function (tree, type, denylistTypes) {
+  if (denylistTypes != null && denylistTypes.includes(tree.type)) return false;
+  if (tree.type === type) return true;
+  return traverseFast(tree, function (node) {
+    if (denylistTypes != null && denylistTypes.includes(node.type)) {
+      return traverseFast.skip;
+    }
+    if (node.type === type) {
+      return traverseFast.stop;
+    }
+  });
+};
+traverse.cache = cache;
+
+//# sourceMappingURL=index.js.map