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/plant.js

@@ -0,0 +1,48 @@
+var baseLodash = require('./_baseLodash'),
+    wrapperClone = require('./_wrapperClone');
+
+/**
+ * Creates a clone of the chain sequence planting `value` as the wrapped value.
+ *
+ * @name plant
+ * @memberOf _
+ * @since 3.2.0
+ * @category Seq
+ * @param {*} value The value to plant.
+ * @returns {Object} Returns the new `lodash` wrapper instance.
+ * @example
+ *
+ * function square(n) {
+ *   return n * n;
+ * }
+ *
+ * var wrapped = _([1, 2]).map(square);
+ * var other = wrapped.plant([3, 4]);
+ *
+ * other.value();
+ * // => [9, 16]
+ *
+ * wrapped.value();
+ * // => [1, 4]
+ */
+function wrapperPlant(value) {
+  var result,
+      parent = this;
+
+  while (parent instanceof baseLodash) {
+    var clone = wrapperClone(parent);
+    clone.__index__ = 0;
+    clone.__values__ = undefined;
+    if (result) {
+      previous.__wrapped__ = clone;
+    } else {
+      result = clone;
+    }
+    var previous = clone;
+    parent = parent.__wrapped__;
+  }
+  previous.__wrapped__ = value;
+  return result;
+}
+
+module.exports = wrapperPlant;