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/binding.js

@@ -0,0 +1,84 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+class Binding {
+  constructor({
+    identifier,
+    scope,
+    path,
+    kind
+  }) {
+    this.identifier = void 0;
+    this.scope = void 0;
+    this.path = void 0;
+    this.kind = void 0;
+    this.constantViolations = [];
+    this.constant = true;
+    this.referencePaths = [];
+    this.referenced = false;
+    this.references = 0;
+    this.identifier = identifier;
+    this.scope = scope;
+    this.path = path;
+    this.kind = kind;
+    if ((kind === "var" || kind === "hoisted") && isInitInLoop(path)) {
+      this.reassign(path);
+    }
+    this.clearValue();
+  }
+  deoptValue() {
+    this.clearValue();
+    this.hasDeoptedValue = true;
+  }
+  setValue(value) {
+    if (this.hasDeoptedValue) return;
+    this.hasValue = true;
+    this.value = value;
+  }
+  clearValue() {
+    this.hasDeoptedValue = false;
+    this.hasValue = false;
+    this.value = null;
+  }
+  reassign(path) {
+    this.constant = false;
+    if (this.constantViolations.includes(path)) {
+      return;
+    }
+    this.constantViolations.push(path);
+  }
+  reference(path) {
+    if (this.referencePaths.includes(path)) {
+      return;
+    }
+    this.referenced = true;
+    this.references++;
+    this.referencePaths.push(path);
+  }
+  dereference() {
+    this.references--;
+    this.referenced = !!this.references;
+  }
+}
+exports.default = Binding;
+function isInitInLoop(path) {
+  const isFunctionDeclarationOrHasInit = !path.isVariableDeclarator() || path.node.init;
+  for (let {
+    parentPath,
+    key
+  } = path; parentPath; {
+    parentPath,
+    key
+  } = parentPath) {
+    if (parentPath.isFunctionParent()) return false;
+    if (key === "left" && parentPath.isForXStatement() || isFunctionDeclarationOrHasInit && key === "body" && parentPath.isLoop()) {
+      return true;
+    }
+  }
+  return false;
+}
+
+//# sourceMappingURL=binding.js.map