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/utils.Cn0zI1t3.js

@@ -0,0 +1,68 @@
+import { parseRegexp } from '@vitest/utils';
+
+const REGEXP_WRAP_PREFIX = "$$vitest:";
+const processSend = process.send?.bind(process);
+const processOn = process.on?.bind(process);
+const processOff = process.off?.bind(process);
+const dispose = [];
+function createThreadsRpcOptions({
+  port
+}) {
+  return {
+    post: (v) => {
+      port.postMessage(v);
+    },
+    on: (fn) => {
+      port.addListener("message", fn);
+    }
+  };
+}
+function disposeInternalListeners() {
+  for (const fn of dispose) {
+    try {
+      fn();
+    } catch {
+    }
+  }
+  dispose.length = 0;
+}
+function createForksRpcOptions(nodeV8) {
+  return {
+    serialize: nodeV8.serialize,
+    deserialize: (v) => nodeV8.deserialize(Buffer.from(v)),
+    post(v) {
+      processSend(v);
+    },
+    on(fn) {
+      const handler = (message, ...extras) => {
+        if (message?.__tinypool_worker_message__) {
+          return;
+        }
+        return fn(message, ...extras);
+      };
+      processOn("message", handler);
+      dispose.push(() => processOff("message", handler));
+    }
+  };
+}
+function unwrapSerializableConfig(config) {
+  if (config.testNamePattern && typeof config.testNamePattern === "string") {
+    const testNamePattern = config.testNamePattern;
+    if (testNamePattern.startsWith(REGEXP_WRAP_PREFIX)) {
+      config.testNamePattern = parseRegexp(
+        testNamePattern.slice(REGEXP_WRAP_PREFIX.length)
+      );
+    }
+  }
+  if (config.defines && Array.isArray(config.defines.keys) && config.defines.original) {
+    const { keys, original } = config.defines;
+    const defines = {};
+    for (const key of keys) {
+      defines[key] = original[key];
+    }
+    config.defines = defines;
+  }
+  return config;
+}
+
+export { createThreadsRpcOptions as a, createForksRpcOptions as c, disposeInternalListeners as d, unwrapSerializableConfig as u };