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/vitest/dist/chunks/benchmark.Cdu9hjj4.js

@@ -0,0 +1,40 @@
+import { getCurrentSuite } from '@vitest/runner';
+import { createChainable } from '@vitest/runner/utils';
+import { noop } from '@vitest/utils';
+import { g as getWorkerState } from './utils.C8RiOc4B.js';
+
+const benchFns = /* @__PURE__ */ new WeakMap();
+const benchOptsMap = /* @__PURE__ */ new WeakMap();
+function getBenchOptions(key) {
+  return benchOptsMap.get(key);
+}
+function getBenchFn(key) {
+  return benchFns.get(key);
+}
+const bench = createBenchmark(function(name, fn = noop, options = {}) {
+  if (getWorkerState().config.mode !== "benchmark") {
+    throw new Error("`bench()` is only available in benchmark mode.");
+  }
+  const task = getCurrentSuite().task(formatName(name), {
+    ...this,
+    meta: {
+      benchmark: true
+    }
+  });
+  benchFns.set(task, fn);
+  benchOptsMap.set(task, options);
+});
+function createBenchmark(fn) {
+  const benchmark = createChainable(
+    ["skip", "only", "todo"],
+    fn
+  );
+  benchmark.skipIf = (condition) => condition ? benchmark.skip : benchmark;
+  benchmark.runIf = (condition) => condition ? benchmark : benchmark.skip;
+  return benchmark;
+}
+function formatName(name) {
+  return typeof name === "string" ? name : name instanceof Function ? name.name || "<anonymous>" : String(name);
+}
+
+export { getBenchOptions as a, bench as b, getBenchFn as g };