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/coverage.BoMDb1ip.js

@@ -0,0 +1,68 @@
+const CoverageProviderMap = {
+  v8: "@vitest/coverage-v8",
+  istanbul: "@vitest/coverage-istanbul"
+};
+async function resolveCoverageProviderModule(options, loader) {
+  if (!options?.enabled || !options.provider) {
+    return null;
+  }
+  const provider = options.provider;
+  if (provider === "v8" || provider === "istanbul") {
+    let builtInModule = CoverageProviderMap[provider];
+    if (provider === "v8" && loader.isBrowser) {
+      builtInModule += "/browser";
+    }
+    const { default: coverageModule } = await loader.executeId(builtInModule);
+    if (!coverageModule) {
+      throw new Error(
+        `Failed to load ${CoverageProviderMap[provider]}. Default export is missing.`
+      );
+    }
+    return coverageModule;
+  }
+  let customProviderModule;
+  try {
+    customProviderModule = await loader.executeId(options.customProviderModule);
+  } catch (error) {
+    throw new Error(
+      `Failed to load custom CoverageProviderModule from ${options.customProviderModule}`,
+      { cause: error }
+    );
+  }
+  if (customProviderModule.default == null) {
+    throw new Error(
+      `Custom CoverageProviderModule loaded from ${options.customProviderModule} was not the default export`
+    );
+  }
+  return customProviderModule.default;
+}
+async function getCoverageProvider(options, loader) {
+  const coverageModule = await resolveCoverageProviderModule(options, loader);
+  if (coverageModule) {
+    return coverageModule.getProvider();
+  }
+  return null;
+}
+async function startCoverageInsideWorker(options, loader) {
+  const coverageModule = await resolveCoverageProviderModule(options, loader);
+  if (coverageModule) {
+    return coverageModule.startCoverage?.();
+  }
+  return null;
+}
+async function takeCoverageInsideWorker(options, loader) {
+  const coverageModule = await resolveCoverageProviderModule(options, loader);
+  if (coverageModule) {
+    return coverageModule.takeCoverage?.();
+  }
+  return null;
+}
+async function stopCoverageInsideWorker(options, loader) {
+  const coverageModule = await resolveCoverageProviderModule(options, loader);
+  if (coverageModule) {
+    return coverageModule.stopCoverage?.();
+  }
+  return null;
+}
+
+export { CoverageProviderMap as C, stopCoverageInsideWorker as a, getCoverageProvider as g, startCoverageInsideWorker as s, takeCoverageInsideWorker as t };