feat(ticket): restaurar tarjeta Descripción del lateral

frontend/src/app/(app)/tickets/[id]/page.tsx

@@ -950,6 +950,14 @@ export default function TicketDetailPage() {
               <span className="value">{formatDateTime(ticket.updatedAt)}</span>
             </div>
           </div>
+
+          {/* Description */}
+          <div className="ticket-info-card">
+            <h6>Descripción</h6>
+            <p style={{ fontSize: "0.875rem", lineHeight: 1.6, marginBottom: 0 }}>
+              {ticket.description || "Sin descripción"}
+            </p>
+          </div>
         </div>
       </div>