fix(测试跟踪): 测试计划和评审用例上一页下一页显示数量不正确

--bug=1013774 --user=陈建星 【测试跟踪】github#14253 开始用例评审，评审页面用例条数分页时 会显示不正确 https://www.tapd.cn/55049933/s/1177230
--bug=1013306 --user=陈建星 【测试计划】执行功能用例页面用例数统计错误-偶发但经常遇到 https://www.tapd.cn/55049933/s/1177244

frontend/src/business/components/track/plan/view/comonents/functional/FunctionalTestCaseEdit.vue

@@ -366,6 +366,7 @@ export default {
         return;
       } else if (this.index === this.testCases.length - 1) {
         this.$emit('nextPage');
+        this.index = 0;
         return;
       }
       this.index++;
@@ -384,6 +385,7 @@ export default {
         return;
       } else if (this.index === 0) {
         this.$emit('prePage');
+        this.index = this.pageSize - 1;
         return;
       }
       this.index--;

frontend/src/business/components/track/review/view/components/TestReviewTestCaseEdit.vue

@@ -368,9 +368,12 @@ export default {
     },
     handleNext() {
       if (this.index === this.testCases.length - 1 && this.pageNum === this.pageTotal) {
+        // 最后一条不处理
         return;
       } else if (this.index === this.testCases.length - 1) {
+        // 到本页最后一条数据，则翻页
         this.$emit('nextPage');
+        this.index = 0;
         return;
       }
       this.index++;
@@ -381,6 +384,7 @@ export default {
         return;
       } else if (this.index === 0) {
         this.$emit('prePage');
+        this.index = this.pageSize - 1;
         return;
       }
       this.index--;

frontend/src/business/components/track/review/view/components/TestReviewTestCaseList.vue

@@ -372,7 +372,7 @@ export default {
           this.total = data.itemCount;
           this.tableData = data.listObject;
           this.getPreData();
-          if (callback && typeof callback === "function") {
+          if (callback && callback instanceof Function) {
             callback();
           }
           setTimeout(() => {