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/scope/traverseForScope.js

@@ -0,0 +1,66 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = traverseForScope;
+var _t = require("@babel/types");
+var _index = require("../index.js");
+var _visitors = require("../visitors.js");
+var _context = require("../path/context.js");
+const {
+  VISITOR_KEYS
+} = _t;
+function traverseForScope(path, visitors, state) {
+  const exploded = (0, _visitors.explode)(visitors);
+  if (exploded.enter || exploded.exit) {
+    throw new Error("Should not be used with enter/exit visitors.");
+  }
+  _traverse(path.parentPath, path.parent, path.node, path.container, path.key, path.listKey, path.hub, path);
+  function _traverse(parentPath, parent, node, container, key, listKey, hub, inPath) {
+    if (!node) {
+      return;
+    }
+    const path = inPath || _index.NodePath.get({
+      hub,
+      parentPath,
+      parent,
+      container,
+      listKey,
+      key
+    });
+    _context._forceSetScope.call(path);
+    const visitor = exploded[node.type];
+    if (visitor != null && visitor.enter) {
+      for (const visit of visitor.enter) {
+        visit.call(state, path, state);
+      }
+    }
+    if (path.shouldSkip) {
+      return;
+    }
+    const keys = VISITOR_KEYS[node.type];
+    if (!(keys != null && keys.length)) {
+      return;
+    }
+    for (const key of keys) {
+      const prop = node[key];
+      if (!prop) continue;
+      if (Array.isArray(prop)) {
+        for (let i = 0; i < prop.length; i++) {
+          const value = prop[i];
+          _traverse(path, node, value, prop, i, key);
+        }
+      } else {
+        _traverse(path, node, prop, node, key, null);
+      }
+    }
+    if (visitor != null && visitor.exit) {
+      for (const visit of visitor.exit) {
+        visit.call(state, path, state);
+      }
+    }
+  }
+}
+
+//# sourceMappingURL=traverseForScope.js.map