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/tsx/dist/cjs/api/index.mjs

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+import"../../get-pipe-path-BHW2eJdv.mjs";import{r as j}from"../../register-CFH5oNdT.mjs";import{t as l}from"../../require-DQxpCAr4.mjs";import"module";import"node:path";import"../../temporary-directory-CwHp0_NW.mjs";import"node:os";import"node:module";import"node:url";import"get-tsconfig";import"node:fs";import"../../index-7AaEi15b.mjs";import"esbuild";import"node:crypto";import"../../client-BQVF1NaW.mjs";import"node:net";import"node:util";import"../../index-gbaejti9.mjs";export{j as register,l as require};