NEZ-309 feat:alert rule相关页面增加 operator，threshold，unit字段 & singlestat chart添加no data & asset model 同步添加确认提示框

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

@@ -357,9 +357,10 @@ const en = {
     testSuccess:'Test success',
     downloadSuccess : 'Download success',
     uploadSuccess: 'Upload success',
-    pressEnterToAdd: 'Press enter to add new line',
+    pressEnterToAdd: 'Press enter to add new此操作可能造成原有数据或图表被覆盖，确认同步吗？ line',
     resetSuccess:'Reset success',
-    syncSuccess:'Synchronize success'
+    syncSuccess:'Synchronize success',
+    syncTip:'This operation may cause the original data or chart to be overwritten. Are you sure to synchronize?',
   },
   asset:{
     asset: 'Asset',
@@ -792,7 +793,10 @@ const en = {
         project: 'Project',//'系统'
         module: 'Module',//'组件'
         asset: 'Device'//'设备'
-      }
+      },
+      operator:'Operator',
+      threshold:'Threshold',
+      unit:'Unit'
     }
   },
   project: {