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/fast-uri/test/equal.test.js

@@ -0,0 +1,108 @@
+'use strict'
+
+const test = require('tape')
+const fastURI = require('..')
+
+const fn = fastURI.equal
+const runTest = (t, suite) => {
+  suite.forEach(s => {
+    const operator = s.result ? '==' : '!='
+    t.equal(fn(s.pair[0], s.pair[1]), s.result, `${s.pair[0]} ${operator} ${s.pair[1]}`)
+    t.equal(fn(s.pair[1], s.pair[0]), s.result, `${s.pair[1]} ${operator} ${s.pair[0]}`)
+  })
+}
+
+test('URI Equals', (t) => {
+  const suite = [
+    { pair: ['example://a/b/c/%7Bfoo%7D', 'eXAMPLE://a/./b/../b/%63/%7bfoo%7d'], result: true }, // test from RFC 3986
+    { pair: ['http://example.org/~user', 'http://example.org/%7euser'], result: true } // test from RFC 3987
+  ]
+  runTest(t, suite)
+  t.end()
+})
+
+//   test('IRI Equals', (t) => {
+//     // example from RFC 3987
+//     t.equal(URI.equal('example://a/b/c/%7Bfoo%7D/ros\xE9', 'eXAMPLE://a/./b/../b/%63/%7bfoo%7d/ros%C3%A9', IRI_OPTION), true)
+//     t.end()
+//   })
+
+test('HTTP Equals', (t) => {
+  const suite = [
+    // test from RFC 2616
+    { pair: ['http://abc.com:80/~smith/home.html', 'http://abc.com/~smith/home.html'], result: true },
+    { pair: [{ scheme: 'http', host: 'abc.com', port: 80, path: '/~smith/home.html' }, 'http://abc.com/~smith/home.html'], result: true },
+    { pair: ['http://ABC.com/%7Esmith/home.html', 'http://abc.com/~smith/home.html'], result: true },
+    { pair: ['http://ABC.com:/%7esmith/home.html', 'http://abc.com/~smith/home.html'], result: true },
+    { pair: ['HTTP://ABC.COM', 'http://abc.com/'], result: true },
+    // test from RFC 3986
+    { pair: ['http://example.com:/', 'http://example.com:80/'], result: true }
+  ]
+  runTest(t, suite)
+  t.end()
+})
+
+test('HTTPS Equals', (t) => {
+  const suite = [
+    { pair: ['https://example.com', 'https://example.com:443/'], result: true },
+    { pair: ['https://example.com:/', 'https://example.com:443/'], result: true }
+  ]
+  runTest(t, suite)
+  t.end()
+})
+
+test('URN Equals', (t) => {
+  const suite = [
+    // test from RFC 2141
+    { pair: ['urn:foo:a123,456', 'urn:foo:a123,456'], result: true },
+    { pair: ['urn:foo:a123,456', 'URN:foo:a123,456'], result: true },
+    { pair: ['urn:foo:a123,456', 'urn:FOO:a123,456'], result: true }
+  ]
+
+  // Disabling for now as the whole equal logic might need
+  // to be refactored
+  // t.equal(URI.equal('urn:foo:a123,456', 'urn:foo:A123,456'), false)
+  // t.equal(URI.equal('urn:foo:a123%2C456', 'URN:FOO:a123%2c456'), true)
+
+  runTest(t, suite)
+
+  t.throws(() => {
+    fn('urn:', 'urn:FOO:a123,456')
+  }, 'URN without nid cannot be serialized')
+
+  t.end()
+})
+
+test('UUID Equals', (t) => {
+  const suite = [
+    { pair: ['URN:UUID:F81D4FAE-7DEC-11D0-A765-00A0C91E6BF6', 'urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6'], result: true }
+  ]
+
+  runTest(t, suite)
+  t.end()
+})
+
+// test('Mailto Equals', (t) => {
+//   // tests from RFC 6068
+//   t.equal(URI.equal('mailto:addr1@an.example,addr2@an.example', 'mailto:?to=addr1@an.example,addr2@an.example'), true)
+//   t.equal(URI.equal('mailto:?to=addr1@an.example,addr2@an.example', 'mailto:addr1@an.example?to=addr2@an.example'), true)
+//   t.end()
+// })
+
+test('WS Equal', (t) => {
+  const suite = [
+    { pair: ['WS://ABC.COM:80/chat#one', 'ws://abc.com/chat'], result: true }
+  ]
+
+  runTest(t, suite)
+  t.end()
+})
+
+test('WSS Equal', (t) => {
+  const suite = [
+    { pair: ['WSS://ABC.COM:443/chat#one', 'wss://abc.com/chat'], result: true }
+  ]
+
+  runTest(t, suite)
+  t.end()
+})