fixed issue

frontend/src/pages/HoldingsTracker.tsx

@@ -130,7 +130,6 @@ export default function HoldingsTracker() {
   }, [tab]);
 
   const fmtC = (n: number, cur: string = 'USD') => formatCurrency(n, cur);
-  const fmt = (n: number) => n?.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 }) ?? '—';
   const fmtPct = (n: number) => `${n >= 0 ? '+' : ''}${n?.toFixed(2)}%`;
 
   // Group holdings by market