fix: statistic tooltips

web/src/echarts.js

@@ -10,6 +10,7 @@ import {
     GridComponent,
     DatasetComponent,
     TransformComponent,
+    LegendComponent,
 } from "echarts/components";
 
 // 标签自动布局，全局过渡动画等特性
@@ -28,6 +29,7 @@ echarts.use([
     PieChart,
     LabelLayout,
     UniversalTransition,
+    LegendComponent,
     CanvasRenderer,
     LineChart,
 ]);