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/@rollup/plugin-babel/package.json

@@ -0,0 +1,91 @@
+{
+  "name": "@rollup/plugin-babel",
+  "version": "5.3.1",
+  "publishConfig": {
+    "access": "public"
+  },
+  "description": "Seamless integration between Rollup and Babel.",
+  "license": "MIT",
+  "repository": {
+    "url": "rollup/plugins",
+    "directory": "packages/babel"
+  },
+  "author": "Rich Harris",
+  "homepage": "https://github.com/rollup/plugins/tree/master/packages/babel#readme",
+  "bugs": "https://github.com/rollup/plugins/issues",
+  "main": "dist/index.js",
+  "module": "dist/index.es.js",
+  "engines": {
+    "node": ">= 10.0.0"
+  },
+  "scripts": {
+    "build": "rollup -c",
+    "ci:coverage": "nyc pnpm test && nyc report --reporter=text-lcov > coverage.lcov",
+    "ci:lint": "pnpm build && pnpm lint",
+    "ci:lint:commits": "commitlint --from=${CIRCLE_BRANCH} --to=${CIRCLE_SHA1}",
+    "ci:test": "pnpm test -- --verbose",
+    "prebuild": "del-cli dist",
+    "prerelease": "pnpm build",
+    "pretest": "pnpm build",
+    "release": "pnpm plugin:release --workspace-root -- --pkg $npm_package_name",
+    "test": "ava",
+    "test:ts": "tsc types/index.d.ts test/types.ts --noEmit"
+  },
+  "files": [
+    "dist",
+    "types",
+    "README.md",
+    "LICENSE"
+  ],
+  "keywords": [
+    "rollup",
+    "plugin",
+    "rollup-plugin",
+    "babel",
+    "es2015",
+    "es6"
+  ],
+  "peerDependencies": {
+    "@babel/core": "^7.0.0",
+    "@types/babel__core": "^7.1.9",
+    "rollup": "^1.20.0||^2.0.0"
+  },
+  "peerDependenciesMeta": {
+    "@types/babel__core": {
+      "optional": true
+    }
+  },
+  "dependencies": {
+    "@babel/helper-module-imports": "^7.10.4",
+    "@rollup/pluginutils": "^3.1.0"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.10.5",
+    "@babel/plugin-external-helpers": "^7.10.4",
+    "@babel/plugin-proposal-decorators": "^7.10.5",
+    "@babel/plugin-syntax-dynamic-import": "^7.8.3",
+    "@babel/plugin-transform-runtime": "^7.10.5",
+    "@babel/preset-env": "^7.10.4",
+    "@rollup/plugin-json": "^4.1.0",
+    "@rollup/plugin-node-resolve": "^10.0.0",
+    "@types/babel__core": "^7.1.9",
+    "rollup": "^2.67.3",
+    "source-map": "^0.7.3"
+  },
+  "types": "types/index.d.ts",
+  "ava": {
+    "babel": {
+      "compileEnhancements": false
+    },
+    "files": [
+      "!**/fixtures/**",
+      "!**/helpers/**",
+      "!**/recipes/**",
+      "!**/types.ts"
+    ]
+  },
+  "contributors": [
+    "Bogdan Chadkin <trysound@yandex.ru>",
+    "Mateusz Burzyński <mateuszburzynski@gmail.com> (https://github.com/Andarist)"
+  ]
+}