first commit. working

components/SyncButton.tsx

@@ -0,0 +1,19 @@
+"use client";
+import React from 'react';
+
+export default function SyncButton() {
+  const handleSync = async () => {
+    const res = await fetch('/api/sync');
+    const json = await res.json();
+    alert(json.message);
+  };
+
+  return (
+    <button
+      onClick={handleSync}
+      className="mb-4 px-4 py-2 border rounded"
+    >
+      Sync
+    </button>
+  );
+}