list위젯 카드 기능 재구현

frontend/components/admin/dashboard/WidgetConfigSidebar.tsx

@@ -579,30 +579,16 @@ export function WidgetConfigSidebar({ element, isOpen, onClose, onApply }: Widge
                   refreshInterval={element.chartConfig?.refreshInterval || 5}
                   markerType={element.chartConfig?.markerType || "circle"}
                   onRefreshIntervalChange={(interval) => {
-                    setElement((prev) =>
-                      prev
-                        ? {
-                            ...prev,
-                            chartConfig: {
-                              ...prev.chartConfig,
-                              refreshInterval: interval,
-                            },
-                          }
-                        : prev
-                    );
+                    setChartConfig((prev) => ({
+                      ...prev,
+                      refreshInterval: interval,
+                    }));
                   }}
                   onMarkerTypeChange={(type) => {
-                    setElement((prev) =>
-                      prev
-                        ? {
-                            ...prev,
-                            chartConfig: {
-                              ...prev.chartConfig,
-                              markerType: type,
-                            },
-                          }
-                        : prev
-                    );
+                    setChartConfig((prev) => ({
+                      ...prev,
+                      markerType: type,
+                    }));
                   }}
                 />
               )}