fix: 修复未对无数据情况做处理，导致单侧实例报错的问题

src/views/charts2/charts/linkMonitor/localComponents/LinkTrafficDrillDownList.vue

@@ -148,6 +148,10 @@ export default {
         if (response.status === 200) {
           this.showError = false
           this.isNoData = res.data.result.length === 0
+          if (this.isNoData) {
+            this.linkTrafficListData = {}
+            this.linkTrafficListData.npmScore = '-'
+          } else {
             const data = {
               establishLatencyMs: _.get(res.data.result[0], 'establishLatencyMs', null),
               httpResponseLatency: _.get(res.data.result[0], 'httpResponseLatency', null),
@@ -157,6 +161,7 @@ export default {
             }
             this.linkTrafficListData = res.data.result[0]
             this.linkTrafficListData.npmScore = computeScore(data)
+          }
         } else {
           this.showError = true
           this.errorMsg = res.message

test/views/charts2/charts/npm/NpmAppCategoryScore.test.js

@@ -125,7 +125,7 @@ describe('views/charts2/charts/npm/NpmAppCategoryScore.vue测试', () => {
 
       expect(textNode0.text()).toBe('6')
       expect(textNode1.text()).toBe('6')
-      expect(textNode2.text()).toBe('-')
+      expect(textNode2.text()).toBe('6')
       // expect(textNode3.text()).toBe('-')
       expect(textNode4.text()).toBe('5')
       expect(textNode5.text()).toBe('3')