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/lodash/templateSettings.js

@@ -0,0 +1,67 @@
+var escape = require('./escape'),
+    reEscape = require('./_reEscape'),
+    reEvaluate = require('./_reEvaluate'),
+    reInterpolate = require('./_reInterpolate');
+
+/**
+ * By default, the template delimiters used by lodash are like those in
+ * embedded Ruby (ERB) as well as ES2015 template strings. Change the
+ * following template settings to use alternative delimiters.
+ *
+ * @static
+ * @memberOf _
+ * @type {Object}
+ */
+var templateSettings = {
+
+  /**
+   * Used to detect `data` property values to be HTML-escaped.
+   *
+   * @memberOf _.templateSettings
+   * @type {RegExp}
+   */
+  'escape': reEscape,
+
+  /**
+   * Used to detect code to be evaluated.
+   *
+   * @memberOf _.templateSettings
+   * @type {RegExp}
+   */
+  'evaluate': reEvaluate,
+
+  /**
+   * Used to detect `data` property values to inject.
+   *
+   * @memberOf _.templateSettings
+   * @type {RegExp}
+   */
+  'interpolate': reInterpolate,
+
+  /**
+   * Used to reference the data object in the template text.
+   *
+   * @memberOf _.templateSettings
+   * @type {string}
+   */
+  'variable': '',
+
+  /**
+   * Used to import variables into the compiled template.
+   *
+   * @memberOf _.templateSettings
+   * @type {Object}
+   */
+  'imports': {
+
+    /**
+     * A reference to the `lodash` function.
+     *
+     * @memberOf _.templateSettings.imports
+     * @type {Function}
+     */
+    '_': { 'escape': escape }
+  }
+};
+
+module.exports = templateSettings;