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/tinypool/dist/utils-B--2TaWv.js

@@ -0,0 +1,38 @@
+import { pathToFileURL } from "node:url";
+
+//#region src/entry/utils.ts
+let importESMCached;
+function getImportESM() {
+	if (importESMCached === void 0) importESMCached = new Function("specifier", "return import(specifier)");
+	return importESMCached;
+}
+const handlerCache = new Map();
+async function getHandler(filename, name) {
+	let handler = handlerCache.get(`${filename}/${name}`);
+	if (handler !== void 0) return handler;
+	try {
+		const handlerModule = await import(filename);
+		handler = typeof handlerModule.default !== "function" && handlerModule.default || handlerModule;
+		if (typeof handler !== "function") handler = await handler[name];
+	} catch {}
+	if (typeof handler !== "function") {
+		handler = await getImportESM()(pathToFileURL(filename).href);
+		if (typeof handler !== "function") handler = await handler[name];
+	}
+	if (typeof handler !== "function") return null;
+	if (handlerCache.size > 1e3) {
+		const [handler$1] = handlerCache;
+		const key = handler$1[0];
+		handlerCache.delete(key);
+	}
+	handlerCache.set(`${filename}/${name}`, handler);
+	return handler;
+}
+function throwInNextTick(error) {
+	process.nextTick(() => {
+		throw error;
+	});
+}
+
+//#endregion
+export { getHandler, throwInNextTick };