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/object-inspect/test/element.js

@@ -0,0 +1,53 @@
+var inspect = require('../');
+var test = require('tape');
+
+test('element', function (t) {
+    t.plan(3);
+    var elem = {
+        nodeName: 'div',
+        attributes: [{ name: 'class', value: 'row' }],
+        getAttribute: function (key) { return key; },
+        childNodes: []
+    };
+    var obj = [1, elem, 3];
+    t.deepEqual(inspect(obj), '[ 1, <div class="row"></div>, 3 ]');
+    t.deepEqual(inspect(obj, { quoteStyle: 'single' }), "[ 1, <div class='row'></div>, 3 ]");
+    t.deepEqual(inspect(obj, { quoteStyle: 'double' }), '[ 1, <div class="row"></div>, 3 ]');
+});
+
+test('element no attr', function (t) {
+    t.plan(1);
+    var elem = {
+        nodeName: 'div',
+        getAttribute: function (key) { return key; },
+        childNodes: []
+    };
+    var obj = [1, elem, 3];
+    t.deepEqual(inspect(obj), '[ 1, <div></div>, 3 ]');
+});
+
+test('element with contents', function (t) {
+    t.plan(1);
+    var elem = {
+        nodeName: 'div',
+        getAttribute: function (key) { return key; },
+        childNodes: [{ nodeName: 'b' }]
+    };
+    var obj = [1, elem, 3];
+    t.deepEqual(inspect(obj), '[ 1, <div>...</div>, 3 ]');
+});
+
+test('element instance', function (t) {
+    t.plan(1);
+    var h = global.HTMLElement;
+    global.HTMLElement = function (name, attr) {
+        this.nodeName = name;
+        this.attributes = attr;
+    };
+    global.HTMLElement.prototype.getAttribute = function () {};
+
+    var elem = new global.HTMLElement('div', []);
+    var obj = [1, elem, 3];
+    t.deepEqual(inspect(obj), '[ 1, <div></div>, 3 ]');
+    global.HTMLElement = h;
+});