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/api/firmware/route.ts

@@ -0,0 +1,13 @@
+import { NextResponse } from "next/server";
+import { discoverFirmware } from "@/lib/firmware";
+
+export const dynamic = "force-dynamic";
+
+export async function GET() {
+  const firmwares = discoverFirmware();
+  return NextResponse.json({
+    chipFamily: "ESP32",
+    count: firmwares.length,
+    firmwares,
+  });
+}