fix： 修改 valiue Mapping 不显示的问题

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

@@ -88,6 +88,9 @@ export default {
             gauge.value = getMetricTypeValue(data.values, chartInfo.param.statistics || 'last')
             gauge.max = getMetricTypeValue(data.values, 'max')
             gauge.min = getMetricTypeValue(data.values, 'min')
+            if (gauge.min === gauge.max) {
+              gauge.min = gauge.max / 2
+            }
             gauge.label = data.metric
             gauge.legend = this.handleLegend(chartInfo, data, expressionIndex, dataIndex, colorIndex).alias
             gauge.name = this.handleLegend(chartInfo, data, expressionIndex, dataIndex, colorIndex).name

nezha-fronted/src/components/common/rightBox/chart/chartConfig.vue

@@ -508,9 +508,9 @@
           ></el-switch>
         </div>
         <transition name="el-zoom-in-top">
-          <el-row v-if="chartConfig.param.enable.thresholds">
+          <el-row v-if="chartConfig.param.enable.valueMapping">
             <div
-              v-for="(item,index) in chartConfig.param.thresholds"
+              v-for="(item,index) in chartConfig.param.valueMapping"
               :key="index"
             >
               <div class="chart-title chart-title-config">

nezha-fronted/src/components/common/rightBox/chart/publicConfig.js

@@ -399,6 +399,17 @@ export default {
       this.chartConfig.param.tags = newTags
       this.chartConfig.param.indexs = newTags.map(item => item.text).join(',')
       this.change()
-    }
+    },
+    enableChange (type) {
+      switch (type) {
+        case 'valueMapping':
+          break;
+        case 'legend':
+          break;
+        case '':
+          break;
+      }
+      this.change()
+    },
   }
 }