테마 설정 local storage 설정하도록 수정

frontend/src/components/ChartSlot.tsx

@@ -424,7 +424,6 @@ const ChartSlot = forwardRef<ChartSlotHandle, ChartSlotProps>(function ChartSlot
         symbol,
         timeframe,
         chartType: 'candlestick',
-        theme,
         mode: 'normal',
         logScale: false,
         drawingsLocked: false,
@@ -437,7 +436,7 @@ const ChartSlot = forwardRef<ChartSlotHandle, ChartSlotProps>(function ChartSlot
     }, 2000);
     return () => { if (saveTimerRef.current) clearTimeout(saveTimerRef.current); };
   // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [slotIndex, symbol, timeframe, theme, indicators, mainChartStyle]);
+  }, [slotIndex, symbol, timeframe, indicators, mainChartStyle]);
 
   // ── 동기화 콜백 refs (항상 최신 값을 참조하도록) ─────────────────────────
   const onVisibleRangeChangeRef  = useRef(onVisibleRangeChange);