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>

components/ui/badge.tsx

@@ -0,0 +1,26 @@
+import * as React from "react";
+import { cva, type VariantProps } from "class-variance-authority";
+import { cn } from "@/lib/utils";
+
+const badgeVariants = cva(
+  "inline-flex items-center rounded-md px-2 py-0.5 text-xs font-medium",
+  {
+    variants: {
+      variant: {
+        default: "bg-[rgba(240,197,10,0.12)] text-[var(--accent-hot)]",
+        muted: "bg-[rgba(0,0,0,0.25)] text-[var(--muted)]",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  }
+);
+
+export function Badge({
+  className,
+  variant,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement> & VariantProps<typeof badgeVariants>) {
+  return <div className={cn(badgeVariants({ variant }), className)} {...props} />;
+}