전략 시간봉 오류 수정

frontend/src/utils/ChartManager.ts

@@ -147,11 +147,20 @@ function shouldShowBbBandFill(config: IndicatorConfig): boolean {
 }
 
 function attachBbBandFill(entry: IndicatorEntry, config: IndicatorConfig): void {
+  if (!shouldShowBbBandFill(config)) {
+    detachBbBandFill(entry);
+    return;
+  }
   const basis = seriesByPlotId(entry, 'plot0');
   const upper = seriesByPlotId(entry, 'plot1');
   const lower = seriesByPlotId(entry, 'plot2');
-  if (!basis || !upper || !lower || !shouldShowBbBandFill(config)) return;
+  if (!basis || !upper || !lower) return;
   const bg = resolveBbBandBackground(config.bandBackground);
+  if (entry.bbFillPrimitive) {
+    entry.bbFillPrimitive.updateBackground(bg);
+    entry.bbFillPrimitive.requestRefresh();
+    return;
+  }
   entry.bbFillPrimitive = new BollingerBandFillPrimitive(upper, lower, bg);
   basis.attachPrimitive(entry.bbFillPrimitive);
 }