가상투자 로직 변경

frontend/src/components/VirtualTradingPage.tsx

@@ -28,7 +28,7 @@ import {
 } from './virtual/VirtualGridUnifiedHeader';
 import type { VirtualCardDisplayMode } from './virtual/VirtualTargetCard';
 import { useVirtualIndicatorSnapshots } from '../hooks/useVirtualIndicatorSnapshots';
-import { useVirtualBackendTradeSignals } from '../hooks/useVirtualBackendTradeSignals';
+import { PAPER_TRADES_CHANGED_EVENT } from '../utils/paperTradeEvents';
 import { useVirtualTargetLiveStatus } from '../hooks/useVirtualTargetLiveStatus';
 import type { ChartRealtimeSource } from '../hooks/useChartRealtimeData';
 import {
@@ -195,15 +195,17 @@ const VirtualTradingPage: React.FC<Props> = ({
     session.running,
   );
 
-  useVirtualBackendTradeSignals({
-    enabled: paperTradingEnabled && paperAutoTradeEnabled,
-    session,
-    targets,
-    tickers,
-    paperAutoTradeBudgetPct,
-    positions: summary?.positions,
-    onFilled: () => void refreshPaperData({ focusHistory: true }),
-  });
+  /** 백엔드 자동 체결 후 UI 갱신(프론트는 주문 실행 안 함) */
+  useEffect(() => {
+    if (!session.running) return;
+    const onTradesChanged = () => { void refreshPaperData(); };
+    window.addEventListener(PAPER_TRADES_CHANGED_EVENT, onTradesChanged);
+    const pollId = window.setInterval(onTradesChanged, 20_000);
+    return () => {
+      window.removeEventListener(PAPER_TRADES_CHANGED_EVENT, onTradesChanged);
+      window.clearInterval(pollId);
+    };
+  }, [session.running, refreshPaperData]);
 
   const mergedLiveStatus = useMemo(() => {
     if (!session.running) return liveStatusByMarket;