add name volume and update error handling

src/app/api/magikarp/route.ts

@@ -72,6 +72,6 @@ export async function GET(req: NextRequest) {
         { status: 200 }
       );
     }
-    return Response.json({ error: 'Failed to fetch cards' }, { status: 500 });
+    return Response.json({ error: `Failed to fetch cards: ${err}` }, { status: 500 });
   }
 }

src/app/page.tsx

@@ -96,7 +96,7 @@ export default function Page() {
     setError(null);
     try {
       const res = await fetch('/api/magikarp?pageSize=250&refresh=1', { cache: 'no-store' });
-      if (!res.ok) throw new Error('Failed to refresh');
+      if (!res.ok) throw new Error(`Failed to refresh: ${res.body}`);
       const json = await res.json();
       const list: TcgCard[] = json.data || [];
       list.sort((a, b) => {