feat: 修复切换也会下载图片的问题

packages/extend-components/EC_HistoryView/src/SingleChart.js

@@ -84,9 +84,10 @@ const SingleChart = memo((props) => {
             a.href = chart.getDataURL('image/png');
             a.download = '曲线图片.png'
             a.click();
-            a.remove()
+            a.remove();
+            exportCanvas.setExportFlag(null);
         }
-    }, [exportCanvas]);
+    }, [exportCanvas.exportFlag]);
     useEffect(() => {
         chartRef.current?.resize?.();
         const chart = chartRef.current?.getEchartsInstance?.();

packages/extend-components/EC_HistoryView/src/index.js

@@ -1395,7 +1395,7 @@ const HistoryView = (props) => {
                             />
                         ) : (
                             <SingleChart
-                                exportCanvas={exportFlag}
+                                exportCanvas={{exportFlag, setExportFlag}}
                                 emptyOrError={emptyOrError.current}
                                 dateRange={dateRange}
                                 showBoxOption={showBoxOption}