mongo fix

app/api/books/route.ts

@@ -0,0 +1,7 @@
+import { NextResponse } from "next/server";
+import { prisma } from "@/lib/db";
+
+export async function GET() {
+  const metas = await prisma.bookMeta.findMany();
+  return NextResponse.json(metas.map((m) => ({ book: m.book, ...m.data as Record<string, unknown> })));
+}