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/workbox-google-analytics/utils/constants.d.ts

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+import '../_version.js';
+export declare const QUEUE_NAME = "workbox-google-analytics";
+export declare const MAX_RETENTION_TIME: number;
+export declare const GOOGLE_ANALYTICS_HOST = "www.google-analytics.com";
+export declare const GTM_HOST = "www.googletagmanager.com";
+export declare const ANALYTICS_JS_PATH = "/analytics.js";
+export declare const GTAG_JS_PATH = "/gtag/js";
+export declare const GTM_JS_PATH = "/gtm.js";
+export declare const COLLECT_DEFAULT_PATH = "/collect";
+export declare const COLLECT_PATHS_REGEX: RegExp;

pwa/node_modules/workbox-google-analytics/utils/constants.js

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+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+import '../_version.js';
+export const QUEUE_NAME = 'workbox-google-analytics';
+export const MAX_RETENTION_TIME = 60 * 48; // Two days in minutes
+export const GOOGLE_ANALYTICS_HOST = 'www.google-analytics.com';
+export const GTM_HOST = 'www.googletagmanager.com';
+export const ANALYTICS_JS_PATH = '/analytics.js';
+export const GTAG_JS_PATH = '/gtag/js';
+export const GTM_JS_PATH = '/gtm.js';
+export const COLLECT_DEFAULT_PATH = '/collect';
+// This RegExp matches all known Measurement Protocol single-hit collect
+// endpoints. Most of the time the default path (/collect) is used, but
+// occasionally an experimental endpoint is used when testing new features,
+// (e.g. /r/collect or /j/collect)
+export const COLLECT_PATHS_REGEX = /^\/(\w+\/)?collect/;

pwa/node_modules/workbox-google-analytics/utils/constants.mjs

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+export * from './constants.js';