Add CYD browser flasher with Next.js, i18n, and Web Serial install.

Replace the starter app with a public/local flasher that discovers sibling firmwares, supports en/zh, and documents HTTPS deploy.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/sitemap.ts

@@ -0,0 +1,17 @@
+import type { MetadataRoute } from "next";
+import { routing } from "@/i18n/routing";
+
+export default function sitemap(): MetadataRoute.Sitemap {
+  const base = process.env.NEXT_PUBLIC_SITE_URL || "http://localhost:3000";
+  return routing.locales.map((locale) => ({
+    url: `${base}/${locale}`,
+    lastModified: new Date(),
+    changeFrequency: "weekly",
+    priority: 1,
+    alternates: {
+      languages: Object.fromEntries(
+        routing.locales.map((l) => [l, `${base}/${l}`])
+      ),
+    },
+  }));
+}