perf(views): 优化“设备工况”模块参数的历史数据曲线，默认不显示 symbol

src/views/device-work-status/DevWorkParamData.vue

@@ -132,6 +132,7 @@ const option = computed<EChartsOption>(() => {
     type: 'line',
     seriesLayoutBy: 'column',
     name,
+    showSymbol: false,
   })) as LineSeriesOption;
 
   return {