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/vite-plugin-pwa/dist/generator-EZTYL4FH.js

@@ -0,0 +1,244 @@
+import {
+  extractIcons,
+  mapLink
+} from "./chunk-SF7B43FO.js";
+import {
+  cyan,
+  red
+} from "./chunk-UB6OAFZF.js";
+
+// src/pwa-assets/config.ts
+import { basename, dirname, relative, resolve } from "node:path";
+import { readFile } from "node:fs/promises";
+import { loadConfig } from "@vite-pwa/assets-generator/config";
+import { instructions } from "@vite-pwa/assets-generator/api/instructions";
+async function loadAssetsGeneratorContext(ctx, assetsGeneratorContext) {
+  const root = ctx.viteConfig.root ?? process.cwd();
+  const { config, sources } = await loadConfiguration(root, ctx);
+  if (!config.preset) {
+    console.error([
+      "",
+      cyan(`PWA v${ctx.version}`),
+      red("ERROR: No preset for assets generator found")
+    ].join("\n"));
+    return;
+  }
+  const {
+    preset,
+    images,
+    headLinkOptions: userHeadLinkOptions
+  } = config;
+  if (!images) {
+    console.error([
+      "",
+      cyan(`PWA v${ctx.version}`),
+      red("ERROR: No image provided for assets generator")
+    ].join("\n"));
+    return;
+  }
+  if (Array.isArray(images)) {
+    if (!images.length) {
+      console.error([
+        "",
+        cyan(`PWA v${ctx.version}`),
+        red("ERROR: No image provided for assets generator")
+      ].join("\n"));
+      return;
+    }
+    if (images.length > 1) {
+      console.error([
+        "",
+        cyan(`PWA v${ctx.version}`),
+        red("ERROR: Only one image is supported for assets generator")
+      ].join("\n"));
+      return;
+    }
+  }
+  const pwaAssets = ctx.options.pwaAssets;
+  const useImage = Array.isArray(images) ? images[0] : images;
+  const imageFile = resolve(root, useImage);
+  const publicDir = pwaAssets.integration?.publicDir ?? resolve(root, ctx.viteConfig.publicDir || "public");
+  const outDir = pwaAssets.integration?.outDir ?? resolve(root, ctx.viteConfig.build?.outDir || "dist");
+  const imageName = relative(publicDir, imageFile);
+  const imageOutDir = dirname(resolve(outDir, imageName));
+  const xhtml = userHeadLinkOptions?.xhtml === true;
+  const includeId = userHeadLinkOptions?.includeId === true;
+  const assetsInstructions = await instructions({
+    imageResolver: () => readFile(imageFile),
+    imageName,
+    preset,
+    faviconPreset: userHeadLinkOptions?.preset ?? pwaAssets.htmlPreset,
+    htmlLinks: { xhtml, includeId },
+    basePath: pwaAssets.integration?.baseUrl || ctx.viteConfig.base || "/",
+    resolveSvgName: userHeadLinkOptions?.resolveSvgName ?? ((name) => basename(name))
+  });
+  const {
+    includeHtmlHeadLinks = true,
+    overrideManifestIcons: useOverrideManifestIcons,
+    injectThemeColor = false
+  } = pwaAssets;
+  const overrideManifestIcons = ctx.options.manifest === false || !ctx.options.manifest ? false : "icons" in ctx.options.manifest ? useOverrideManifestIcons : true;
+  if (assetsGeneratorContext === void 0) {
+    return {
+      lastModified: Date.now(),
+      assetsInstructions,
+      cache: /* @__PURE__ */ new Map(),
+      useImage,
+      imageFile,
+      publicDir,
+      outDir,
+      imageName,
+      imageOutDir,
+      xhtml,
+      includeId,
+      // normalize sources
+      sources: sources.map((source) => source.replace(/\\/g, "/")),
+      injectThemeColor,
+      includeHtmlHeadLinks,
+      overrideManifestIcons
+    };
+  }
+  assetsGeneratorContext.lastModified = Date.now();
+  assetsGeneratorContext.assetsInstructions = assetsInstructions;
+  assetsGeneratorContext.useImage = useImage;
+  assetsGeneratorContext.imageFile = imageFile;
+  assetsGeneratorContext.outDir = outDir;
+  assetsGeneratorContext.imageName = imageName;
+  assetsGeneratorContext.imageOutDir = imageOutDir;
+  assetsGeneratorContext.xhtml = xhtml;
+  assetsGeneratorContext.includeId = includeId;
+  assetsGeneratorContext.injectThemeColor = injectThemeColor;
+  assetsGeneratorContext.includeHtmlHeadLinks = includeHtmlHeadLinks;
+  assetsGeneratorContext.overrideManifestIcons = overrideManifestIcons;
+  assetsGeneratorContext.cache.clear();
+}
+async function loadConfiguration(root, ctx) {
+  const pwaAssets = ctx.options.pwaAssets;
+  if (pwaAssets.config === false) {
+    return await loadConfig(root, {
+      config: false,
+      preset: pwaAssets.preset,
+      images: pwaAssets.images,
+      logLevel: "silent"
+    });
+  }
+  return await loadConfig(
+    root,
+    typeof pwaAssets.config === "boolean" ? root : { config: pwaAssets.config }
+  );
+}
+
+// src/pwa-assets/build.ts
+import { mkdir } from "node:fs/promises";
+import { generateAssets } from "@vite-pwa/assets-generator/api/generate-assets";
+async function generate(assetsGeneratorContext) {
+  await mkdir(assetsGeneratorContext.imageOutDir, { recursive: true });
+  await generateAssets(assetsGeneratorContext.assetsInstructions, true, assetsGeneratorContext.imageOutDir);
+}
+
+// src/pwa-assets/dev.ts
+async function findIconAsset(path, { assetsInstructions, cache, lastModified }) {
+  let resolved = cache.get(path);
+  if (resolved) {
+    resolved.age = Date.now() - lastModified;
+    return resolved;
+  }
+  const iconAsset = assetsInstructions.transparent[path] ?? assetsInstructions.maskable[path] ?? assetsInstructions.apple[path] ?? assetsInstructions.favicon[path] ?? assetsInstructions.appleSplashScreen[path];
+  if (!iconAsset)
+    return;
+  if (iconAsset) {
+    resolved = {
+      path,
+      mimeType: iconAsset.mimeType,
+      buffer: iconAsset.buffer(),
+      lastModified: Date.now(),
+      age: 0
+    };
+    cache.set(path, resolved);
+    return resolved;
+  }
+}
+async function checkHotUpdate(file, ctx, assetsGeneratorContext) {
+  const result = assetsGeneratorContext.sources.includes(file);
+  if (result)
+    await loadAssetsGeneratorContext(ctx, assetsGeneratorContext);
+  return result;
+}
+
+// src/pwa-assets/html.ts
+import { generateHtmlMarkup } from "@vite-pwa/assets-generator/api/generate-html-markup";
+function transformIndexHtml(html, ctx, assetsGeneratorContext) {
+  if (assetsGeneratorContext.injectThemeColor) {
+    const manifest = ctx.options.manifest;
+    if (manifest && "theme_color" in manifest && manifest.theme_color) {
+      html = html.replace(
+        "</head>",
+        `
+<meta name="theme-color" content="${manifest.theme_color}"></head>`
+      );
+    }
+  }
+  if (assetsGeneratorContext.includeHtmlHeadLinks) {
+    const link = generateHtmlMarkup(assetsGeneratorContext.assetsInstructions);
+    if (link.length)
+      html = html.replace("</head>", `
+${link.join("\n")}</head>`);
+  }
+  return html;
+}
+function resolveHtmlAssets(ctx, assetsGeneratorContext) {
+  const header = {
+    links: [],
+    themeColor: void 0
+  };
+  if (assetsGeneratorContext.injectThemeColor) {
+    const manifest = ctx.options.manifest;
+    if (manifest && "theme_color" in manifest && manifest.theme_color)
+      header.themeColor = { name: "theme-color", content: manifest.theme_color };
+  }
+  if (assetsGeneratorContext.includeHtmlHeadLinks) {
+    const includeId = assetsGeneratorContext.includeId;
+    const instruction = assetsGeneratorContext.assetsInstructions;
+    const favicon = Array.from(Object.values(instruction.favicon));
+    const apple = Array.from(Object.values(instruction.apple));
+    const appleSplashScreen = Array.from(Object.values(instruction.appleSplashScreen));
+    favicon.forEach((icon) => icon.linkObject && header.links.push(mapLink(includeId, icon.linkObject)));
+    apple.forEach((icon) => icon.linkObject && header.links.push(mapLink(includeId, icon.linkObject)));
+    appleSplashScreen.forEach((icon) => icon.linkObject && header.links.push(mapLink(includeId, icon.linkObject)));
+  }
+  return header;
+}
+
+// src/pwa-assets/manifest.ts
+import { generateManifestIconsEntry } from "@vite-pwa/assets-generator/api/generate-manifest-icons-entry";
+function injectManifestIcons(ctx, assetsGeneratorContext) {
+  if (!assetsGeneratorContext.overrideManifestIcons)
+    return;
+  const manifest = ctx.options.manifest;
+  if (manifest) {
+    manifest.icons = generateManifestIconsEntry(
+      "object",
+      assetsGeneratorContext.assetsInstructions
+    ).icons;
+  }
+}
+
+// src/pwa-assets/generator.ts
+async function loadInstructions(ctx) {
+  const assetsGeneratorContext = await loadAssetsGeneratorContext(ctx);
+  if (!assetsGeneratorContext)
+    return;
+  return {
+    generate: () => generate(assetsGeneratorContext),
+    findIconAsset: (path) => findIconAsset(path, assetsGeneratorContext),
+    resolveHtmlAssets: () => resolveHtmlAssets(ctx, assetsGeneratorContext),
+    transformIndexHtml: (html) => transformIndexHtml(html, ctx, assetsGeneratorContext),
+    injectManifestIcons: () => injectManifestIcons(ctx, assetsGeneratorContext),
+    instructions: () => assetsGeneratorContext.assetsInstructions,
+    icons: () => extractIcons(assetsGeneratorContext.assetsInstructions),
+    checkHotUpdate: (file) => checkHotUpdate(file, ctx, assetsGeneratorContext)
+  };
+}
+export {
+  loadInstructions
+};