refactor: extract UserDisplay helper to reduce duplication in Provenance card

Co-authored-by: tomvothecoder <25624127+tomvothecoder@users.noreply.github.com>

Author: Copilot

frontend/src/features/simulations/components/SimulationDetailsView.tsx

@@ -63,7 +63,6 @@ const DiffCell = ({ value, className }: { value: unknown; className?: string })
     </div>
   );
 };
-
 // -------------------- View Component --------------------
 export const SimulationDetailsView = ({
   simulation,