feat: 交易详情净收益总计加美元金额

frontend/src/App.jsx

@@ -458,6 +458,8 @@ function TradeDetailModal({ trade, orders, onClose }) {
   // Compute USD PnL per leg: AmountUSD * Pnl% / 100
   const longPnlUSD = trade.AmountUSD && trade.LongPnl != null ? trade.AmountUSD * trade.LongPnl / 100 : null
   const shortPnlUSD = trade.AmountUSD && trade.ShortPnl != null ? trade.AmountUSD * trade.ShortPnl / 100 : null
+  // Net PnL USD = total capital (both sides) * NetPnl% / 100
+  const netPnlUSD = trade.AmountUSD && trade.NetPnl != null ? 2 * trade.AmountUSD * trade.NetPnl / 100 : null
 
   return (
     <div className="modal-overlay" onClick={handleOverlayClick}>
@@ -511,7 +513,7 @@ function TradeDetailModal({ trade, orders, onClose }) {
               <h3>净收益</h3>
               <div className="detail-row" style={{ fontSize: 16 }}>
                 <span className="label">总计</span>
-                <span className={'value ' + pnlCls} style={{ fontWeight: 700 }}>{trade.NetPnl != null ? trade.NetPnl.toFixed(4) + '%' : '-'}</span>
+                <span className={'value ' + pnlCls} style={{ fontWeight: 700 }}>{trade.NetPnl != null ? trade.NetPnl.toFixed(4) + '%' : '-'} {netPnlUSD != null ? <span style={{fontSize:12,opacity:0.8}}>(${netPnlUSD.toFixed(4)})</span> : null}</span>
               </div>
             </div>
           </div>