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/setup-common.Dj6BZI3u.js

@@ -0,0 +1,70 @@
+import { addSerializer } from '@vitest/snapshot';
+import { setSafeTimers } from '@vitest/utils';
+import { r as resetRunOnceCounter } from './run-once.2ogXb3JV.js';
+
+let globalSetup = false;
+async function setupCommonEnv(config) {
+  resetRunOnceCounter();
+  setupDefines(config.defines);
+  setupEnv(config.env);
+  if (globalSetup) {
+    return;
+  }
+  globalSetup = true;
+  setSafeTimers();
+  if (config.globals) {
+    (await import('./globals.D8ZVAdXd.js')).registerApiGlobally();
+  }
+}
+function setupDefines(defines) {
+  for (const key in defines) {
+    globalThis[key] = defines[key];
+  }
+}
+function setupEnv(env) {
+  if (typeof process === "undefined") {
+    return;
+  }
+  const { PROD, DEV, ...restEnvs } = env;
+  process.env.PROD = PROD ? "1" : "";
+  process.env.DEV = DEV ? "1" : "";
+  for (const key in restEnvs) {
+    process.env[key] = env[key];
+  }
+}
+async function loadDiffConfig(config, executor) {
+  if (typeof config.diff !== "string") {
+    return;
+  }
+  const diffModule = await executor.executeId(config.diff);
+  if (diffModule && typeof diffModule.default === "object" && diffModule.default != null) {
+    return diffModule.default;
+  } else {
+    throw new Error(
+      `invalid diff config file ${config.diff}. Must have a default export with config object`
+    );
+  }
+}
+async function loadSnapshotSerializers(config, executor) {
+  const files = config.snapshotSerializers;
+  const snapshotSerializers = await Promise.all(
+    files.map(async (file) => {
+      const mo = await executor.executeId(file);
+      if (!mo || typeof mo.default !== "object" || mo.default === null) {
+        throw new Error(
+          `invalid snapshot serializer file ${file}. Must export a default object`
+        );
+      }
+      const config2 = mo.default;
+      if (typeof config2.test !== "function" || typeof config2.serialize !== "function" && typeof config2.print !== "function") {
+        throw new TypeError(
+          `invalid snapshot serializer in ${file}. Must have a 'test' method along with either a 'serialize' or 'print' method.`
+        );
+      }
+      return config2;
+    })
+  );
+  snapshotSerializers.forEach((serializer) => addSerializer(serializer));
+}
+
+export { loadSnapshotSerializers as a, loadDiffConfig as l, setupCommonEnv as s };