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/dist/chunks/git.B5SDxu-n.js

@@ -0,0 +1,69 @@
+import { resolve } from 'pathe';
+import { x } from 'tinyexec';
+
+class VitestGit {
+  constructor(cwd) {
+    this.cwd = cwd;
+  }
+  root;
+  async resolveFilesWithGitCommand(args) {
+    let result;
+    try {
+      result = await x("git", args, { nodeOptions: { cwd: this.root } });
+    } catch (e) {
+      e.message = e.stderr;
+      throw e;
+    }
+    return result.stdout.split("\n").filter((s) => s !== "").map((changedPath) => resolve(this.root, changedPath));
+  }
+  async findChangedFiles(options) {
+    const root = await this.getRoot(this.cwd);
+    if (!root) {
+      return null;
+    }
+    this.root = root;
+    const changedSince = options.changedSince;
+    if (typeof changedSince === "string") {
+      const [committed, staged2, unstaged2] = await Promise.all([
+        this.getFilesSince(changedSince),
+        this.getStagedFiles(),
+        this.getUnstagedFiles()
+      ]);
+      return [...committed, ...staged2, ...unstaged2];
+    }
+    const [staged, unstaged] = await Promise.all([
+      this.getStagedFiles(),
+      this.getUnstagedFiles()
+    ]);
+    return [...staged, ...unstaged];
+  }
+  getFilesSince(hash) {
+    return this.resolveFilesWithGitCommand([
+      "diff",
+      "--name-only",
+      `${hash}...HEAD`
+    ]);
+  }
+  getStagedFiles() {
+    return this.resolveFilesWithGitCommand(["diff", "--cached", "--name-only"]);
+  }
+  getUnstagedFiles() {
+    return this.resolveFilesWithGitCommand([
+      "ls-files",
+      "--other",
+      "--modified",
+      "--exclude-standard"
+    ]);
+  }
+  async getRoot(cwd) {
+    const args = ["rev-parse", "--show-cdup"];
+    try {
+      const result = await x("git", args, { nodeOptions: { cwd } });
+      return resolve(cwd, result.stdout.trim());
+    } catch {
+      return null;
+    }
+  }
+}
+
+export { VitestGit };