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/@vitest/snapshot/dist/manager.js

@@ -0,0 +1,76 @@
+import { join, dirname, basename, isAbsolute, resolve } from 'pathe';
+
+class SnapshotManager {
+  constructor(options) {
+    this.options = options;
+    this.clear();
+  }
+  summary = void 0;
+  extension = ".snap";
+  clear() {
+    this.summary = emptySummary(this.options);
+  }
+  add(result) {
+    addSnapshotResult(this.summary, result);
+  }
+  resolvePath(testPath) {
+    const resolver = this.options.resolveSnapshotPath || (() => {
+      return join(
+        join(dirname(testPath), "__snapshots__"),
+        `${basename(testPath)}${this.extension}`
+      );
+    });
+    const path = resolver(testPath, this.extension);
+    return path;
+  }
+  resolveRawPath(testPath, rawPath) {
+    return isAbsolute(rawPath) ? rawPath : resolve(dirname(testPath), rawPath);
+  }
+}
+function emptySummary(options) {
+  const summary = {
+    added: 0,
+    failure: false,
+    filesAdded: 0,
+    filesRemoved: 0,
+    filesRemovedList: [],
+    filesUnmatched: 0,
+    filesUpdated: 0,
+    matched: 0,
+    total: 0,
+    unchecked: 0,
+    uncheckedKeysByFile: [],
+    unmatched: 0,
+    updated: 0,
+    didUpdate: options.updateSnapshot === "all"
+  };
+  return summary;
+}
+function addSnapshotResult(summary, result) {
+  if (result.added) {
+    summary.filesAdded++;
+  }
+  if (result.fileDeleted) {
+    summary.filesRemoved++;
+  }
+  if (result.unmatched) {
+    summary.filesUnmatched++;
+  }
+  if (result.updated) {
+    summary.filesUpdated++;
+  }
+  summary.added += result.added;
+  summary.matched += result.matched;
+  summary.unchecked += result.unchecked;
+  if (result.uncheckedKeys && result.uncheckedKeys.length > 0) {
+    summary.uncheckedKeysByFile.push({
+      filePath: result.filepath,
+      keys: result.uncheckedKeys
+    });
+  }
+  summary.unmatched += result.unmatched;
+  summary.updated += result.updated;
+  summary.total += result.added + result.matched + result.unmatched + result.updated;
+}
+
+export { SnapshotManager, addSnapshotResult, emptySummary };