perf: 增加chart预览{{name}}映射、修改提示语

nezha-fronted/src/components/charts/chartPreview.vue

@@ -596,7 +596,7 @@
                         if(this.mapping&&!this.mapping.color){
                           this.mapping.color={bac:'#fff',text:'#000'}
                         }
-                        this.serieSingleStat = mapping?mapping.text.replace('{{value}}', singleStatTmp):chartDataFormat.getUnit(chartItem.unit?chartItem.unit:2).compute(singleStatTmp,null,2);
+                        this.serieSingleStat = mapping?mapping.text.replace('{{value}}', singleStatTmp).replace('{{name}}', chartItem.elements[0].legend):chartDataFormat.getUnit(chartItem.unit?chartItem.unit:2).compute(singleStatTmp,null,2);
                       }else{
                         this.serieSingleStat = chartDataFormat.getUnit(chartItem.unit?chartItem.unit:2).compute(singleStatTmp,null,2);
                       }
@@ -1198,7 +1198,7 @@
             }
             this.mapping=mapping;
             item.mapping=mapping;
-            item.value = mapping?mapping.text.replace('{{value}}', item.value):this.unit.compute(value,null,2);
+            item.value = mapping?mapping.text.replace('{{value}}', item.value).replace('{{name}}', item.element.alias):this.unit.compute(value,null,2);
           }
           return item;
         })

nezha-fronted/src/components/common/language/cn.js

@@ -189,7 +189,7 @@ const cn = {
         unit: "单位",
         legend: "图例",
         legendTip: "使用名称或表达式控制时间序列的名称。例如{{hostname}将替换为标签主机名的标签值。",
-        valueMappingTip: '使用{{value}}可以显示原值\n'+
+        valueMappingTip: '使用{{name}}和{{value}}显示原名和原值\n'+
           '例如：total alive: {{value}}\n'+
           '结果为：total alive: 100',
         option: "操作",

nezha-fronted/src/components/common/language/en.js

@@ -147,7 +147,7 @@ const en = {
         legend:'Legend',
         statistics:'Statistics',
         legendTip:'Controls the name of the time series, using name or pattern. For example {{hostname}} will be replaced with label value for the label hostname.',
-        valueMappingTip: 'Use {{value}} to display the original value\n'+
+        valueMappingTip: 'Use {{name}} and {{value}} to display the original name and value\n'+
           'For example: Total Alive: {{value}}\n'+
           'The result is: Total Alive: 100',
         sync: 'Sync to assets',