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/jake/package.json

@@ -0,0 +1,44 @@
+{
+  "name": "jake",
+  "description": "JavaScript build tool, similar to Make or Rake",
+  "keywords": [
+    "build",
+    "cli",
+    "make",
+    "rake"
+  ],
+  "version": "10.9.4",
+  "author": "Matthew Eernisse <mde@fleegix.org> (http://fleegix.org)",
+  "license": "Apache-2.0",
+  "bin": {
+    "jake": "./bin/cli.js"
+  },
+  "main": "./lib/jake.js",
+  "scripts": {
+    "lint": "eslint --format codeframe \"lib/**/*.js\" \"test/**/*.js\"",
+    "lint:fix": "eslint --fix \"lib/**/*.js\" \"test/**/*.js\"",
+    "test": "./bin/cli.js test",
+    "test:ci": "npm run lint && npm run test"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/jakejs/jake.git"
+  },
+  "preferGlobal": true,
+  "dependencies": {
+    "async": "^3.2.6",
+    "filelist": "^1.0.4",
+    "picocolors": "^1.1.1"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.16.0",
+    "eslint": "^9.16.0",
+    "eslint-formatter-codeframe": "^7.32.1",
+    "globals": "^15.13.0",
+    "mocha": "^11.0.1",
+    "q": "^1.5.1"
+  },
+  "engines": {
+    "node": ">=10"
+  }
+}