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/workbox-build/build/lib/get-file-details.js

@@ -0,0 +1,54 @@
+"use strict";
+/*
+  Copyright 2021 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.getFileDetails = void 0;
+const glob_1 = require("glob");
+const upath_1 = __importDefault(require("upath"));
+const errors_1 = require("./errors");
+const get_file_size_1 = require("./get-file-size");
+const get_file_hash_1 = require("./get-file-hash");
+function getFileDetails({ globDirectory, globFollow, globIgnores, globPattern, }) {
+    let globbedFiles;
+    let warning = '';
+    try {
+        globbedFiles = (0, glob_1.globSync)(globPattern, {
+            cwd: globDirectory,
+            follow: globFollow,
+            ignore: globIgnores,
+        });
+    }
+    catch (err) {
+        throw new Error(errors_1.errors['unable-to-glob-files'] +
+            ` '${err instanceof Error && err.message ? err.message : ''}'`);
+    }
+    if (globbedFiles.length === 0) {
+        warning =
+            errors_1.errors['useless-glob-pattern'] +
+                ' ' +
+                JSON.stringify({ globDirectory, globPattern, globIgnores }, null, 2);
+    }
+    const globbedFileDetails = [];
+    for (const file of globbedFiles) {
+        const fullPath = upath_1.default.join(globDirectory, file);
+        const fileSize = (0, get_file_size_1.getFileSize)(fullPath);
+        if (fileSize !== null) {
+            const fileHash = (0, get_file_hash_1.getFileHash)(fullPath);
+            globbedFileDetails.push({
+                file: `${upath_1.default.relative(globDirectory, fullPath)}`,
+                hash: fileHash,
+                size: fileSize,
+            });
+        }
+    }
+    return { globbedFileDetails, warning };
+}
+exports.getFileDetails = getFileDetails;