Fix Prisma query by excluding problematic designImageDimensions field

Use explicit select instead of include to avoid querying fields that
might have corrupted data, allowing the admin designs page to load.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/app/admin/designs/page.tsx

@@ -4,7 +4,13 @@ import AdminNav from '@/components/AdminNav';
 
 export default async function DesignsPage() {
   const designs = await prisma.designApproval.findMany({
-    include: {
+    select: {
+      id: true,
+      customerName: true,
+      customerEmail: true,
+      designPreviewUrl: true,
+      status: true,
+      createdAt: true,
       product: true,
       messages: { orderBy: { createdAt: 'desc' }, take: 1 },
     },