Fix markdown mention chips

Co-Authored-By: Paperclip <noreply@paperclip.ing>

ui/src/components/NewIssueDialog.tsx

@@ -376,6 +376,8 @@ export function NewIssueDialog() {
         id: `agent:${agent.id}`,
         name: agent.name,
         kind: "agent",
+        agentId: agent.id,
+        agentIcon: agent.icon,
       });
     }
     for (const project of orderedProjects) {