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/test/integration/selfdep.js

@@ -0,0 +1,42 @@
+let assert = require('assert');
+let exec = require('child_process').execSync;
+
+const PROJECT_DIR = process.env.PROJECT_DIR;
+const JAKE_CMD = `${PROJECT_DIR}/bin/cli.js`;
+
+suite('selfDep', function () {
+
+  this.timeout(7000);
+
+  let origStderrWrite;
+
+  setup(function () {
+    origStderrWrite = process.stderr.write;
+    process.stderr.write = function () {};
+  });
+
+  teardown(function () {
+    process.stderr.write = origStderrWrite;
+  });
+
+  test('self dep const', function () {
+    try {
+      exec(`${JAKE_CMD} selfdepconst`);
+    }
+    catch(e) {
+      assert(e.message.indexOf('dependency of itself') > -1);
+    }
+  });
+
+  test('self dep dyn', function () {
+    try {
+      exec(`${JAKE_CMD} selfdepdyn`);
+    }
+    catch(e) {
+      assert(e.message.indexOf('dependency of itself') > -1);
+    }
+  });
+
+});
+
+