429 에러 수정

frontend/src/App.tsx

@@ -128,7 +128,7 @@ import { useVirtualLiveStrategy } from './hooks/useVirtualLiveStrategy';
 import type { ChartRealtimeSource } from './hooks/useChartRealtimeData';
 import { VIRTUAL_SESSION_CHANGED_EVENT } from './utils/virtualTradingStorage';
 import { notifyPaperTradesChanged } from './utils/paperTradeEvents';
-import { useIsMobile } from './hooks/useMediaQuery';
+import { useIsMobile, useIsCompactDevice } from './hooks/useMediaQuery';
 import MobileChartDock from './components/MobileChartDock';
 import LoginModal from './components/LoginModal';
 import AppDownloadModal from './components/AppDownloadModal';
@@ -240,15 +240,16 @@ function App() {
   }, [menuPage]);
   const chartVisible = menuPage === 'chart';
   const isMobile = useIsMobile();
+  const isCompactDevice = useIsCompactDevice();
 
   const priorityMarketsRef = useRef<string[]>([symbol]);
   const getPriorityMarkets = useCallback(() => priorityMarketsRef.current, []);
-  /** lite=모바일(청크 REST 금지). loadFull=마켓 패널 열림 시 백엔드 일괄 ticker */
+  /** lite=모바일·태블릿(Upbit 직접 REST 최소). loadFull=마켓 패널 열림 시 백엔드 일괄 */
   const marketTickerOpts = useMemo(() => ({
-    lite: isMobile,
+    lite: isCompactDevice,
     loadFull: showMarketPanel,
     getPriorityMarkets,
-  }), [isMobile, showMarketPanel, getPriorityMarkets]);
+  }), [isCompactDevice, showMarketPanel, getPriorityMarkets]);
   const { tickers: marketTickers, loading: marketLoading, usdRate } = useMarketTicker(marketTickerOpts);
 
   // ── 레이아웃 상태 ─────────────────────────────────────────────────────