Show open/closed state in the order overview header

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/frontend/src/components/orders/ReadOnlyOrderOverviewCard.tsx

@@ -25,6 +25,7 @@ type Order = {
   created_at?: string | null;
   creator_user_id?: string | null;
   creator_email?: string | null;
+  closed?: boolean;
 };
 
 function formatTimestamp(value: string | null | undefined): string {
@@ -108,6 +109,7 @@ export default function ReadOnlyOrderOverviewCard({
           {order.title}
           <Typography.Text type="secondary" style={{ fontSize: 12, fontWeight: "normal" }}>
             by {creatorLabel} ({formatTimestamp(order.created_at)})
+            {order.closed !== undefined && ` · ${order.closed ? "Closed" : "Open"}`}
           </Typography.Text>
           
         </Flex>