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>

i18n/navigation.ts

@@ -0,0 +1,5 @@
+import { createNavigation } from "next-intl/navigation";
+import { routing } from "./routing";
+
+export const { Link, redirect, usePathname, useRouter, getPathname } =
+  createNavigation(routing);

i18n/request.ts

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+import { getRequestConfig } from "next-intl/server";
+import { hasLocale } from "next-intl";
+import { routing } from "./routing";
+
+export default getRequestConfig(async ({ requestLocale }) => {
+  const requested = await requestLocale;
+  const locale = hasLocale(routing.locales, requested)
+    ? requested
+    : routing.defaultLocale;
+
+  return {
+    locale,
+    messages: (await import(`../messages/${locale}.json`)).default,
+  };
+});

i18n/routing.ts

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+import { defineRouting } from "next-intl/routing";
+
+export const routing = defineRouting({
+  locales: ["en", "zh"],
+  defaultLocale: "en",
+  localePrefix: "always",
+});
+
+export type AppLocale = (typeof routing.locales)[number];