fix：修改新增图表 每次的随机色都是一样的问题

nezha-fronted/src/components/chart/chart/chartBar.vue

@@ -80,7 +80,7 @@ export default {
     initChart (chartOption) {
       const self = this
       this.legends = []
-      chartOption.series = this.initPieData(this.chartInfo, chartOption.series[0], this.chartData) // 生成series和legends
+      chartOption.series = this.initBarData(this.chartInfo, chartOption.series[0], this.chartData) // 生成series和legends
       chartOption.xAxis.data = chartOption.series.data.map(item => item.name)
       chartOption.axisLabel = {
         margin: 8,

nezha-fronted/src/components/page/dashboard/panel.vue

@@ -361,6 +361,7 @@ export default {
     /* 图表相关操作--start */
     addChart () {
       this.chart = this.newChart()
+      this.chart.param.thresholds = [{ value: undefined, color: randomcolor() }]
       this.chart.panelId = this.showPanel.id
       this.chart.panelName = this.showPanel.name
     },