拆分解耦

src/components/Button.tsx

@@ -0,0 +1,7 @@
+export default function Button({ label, onClick }: { label: string, onClick?: () => void }) {
+  return (
+    <button onClick={onClick} className="m-1 px-2 py-1 rounded bg-white shadow-2xs font-bold hover:bg-gray-300">
+      {label}
+    </button>
+  );
+}