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/@babel/plugin-transform-regenerator/package.json

@@ -0,0 +1,44 @@
+{
+  "name": "@babel/plugin-transform-regenerator",
+  "author": "The Babel Team (https://babel.dev/team)",
+  "description": "Explode async and generator functions into a state machine.",
+  "version": "7.29.0",
+  "homepage": "https://babel.dev/docs/en/next/babel-plugin-transform-regenerator",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/babel/babel.git",
+    "directory": "packages/babel-plugin-transform-regenerator"
+  },
+  "main": "./lib/index.js",
+  "dependencies": {
+    "@babel/helper-plugin-utils": "^7.28.6"
+  },
+  "license": "MIT",
+  "publishConfig": {
+    "access": "public"
+  },
+  "peerDependencies": {
+    "@babel/core": "^7.0.0-0"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.29.0",
+    "@babel/helper-check-duplicate-nodes": "^7.28.6",
+    "@babel/helper-plugin-test-runner": "^7.27.1",
+    "@babel/plugin-proposal-function-sent": "^7.27.1",
+    "@babel/plugin-transform-arrow-functions": "^7.27.1",
+    "@babel/plugin-transform-block-scoping": "^7.28.6",
+    "@babel/plugin-transform-classes": "^7.28.6",
+    "@babel/plugin-transform-for-of": "^7.27.1",
+    "@babel/plugin-transform-modules-commonjs": "^7.28.6",
+    "@babel/plugin-transform-parameters": "^7.27.7",
+    "@babel/plugin-transform-runtime": "^7.29.0",
+    "babel-plugin-polyfill-regenerator": "^0.6.6",
+    "mocha": "^10.0.0",
+    "recast": "^0.23.3",
+    "uglify-js": "^3.14.0"
+  },
+  "engines": {
+    "node": ">=6.9.0"
+  },
+  "type": "commonjs"
+}