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/helper-compilation-targets/lib/pretty.js

@@ -0,0 +1,40 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.prettifyTargets = prettifyTargets;
+exports.prettifyVersion = prettifyVersion;
+var _semver = require("semver");
+var _targets = require("./targets.js");
+function prettifyVersion(version) {
+  if (typeof version !== "string") {
+    return version;
+  }
+  const {
+    major,
+    minor,
+    patch
+  } = _semver.parse(version);
+  const parts = [major];
+  if (minor || patch) {
+    parts.push(minor);
+  }
+  if (patch) {
+    parts.push(patch);
+  }
+  return parts.join(".");
+}
+function prettifyTargets(targets) {
+  return Object.keys(targets).reduce((results, target) => {
+    let value = targets[target];
+    const unreleasedLabel = _targets.unreleasedLabels[target];
+    if (typeof value === "string" && unreleasedLabel !== value) {
+      value = prettifyVersion(value);
+    }
+    results[target] = value;
+    return results;
+  }, {});
+}
+
+//# sourceMappingURL=pretty.js.map