fix(测试跟踪): 修复功能用例，有的用例不修改信息，点关闭也有保存提示的缺陷

--bug=1010434 --user=王孝刚 【测试跟踪】功能用例，有的用例不修改信息，点关闭也有保存提示
https://www.tapd.cn/55049933/s/1109488

frontend/src/business/components/track/common/minder/TestCaseMinder.vue

@@ -354,7 +354,7 @@ name: "TestCaseMinder",
         nodeId: nodeId,
         nodePath: getNodePath(nodeId, this.moduleOptions),
         type: data.type ? data.type : 'functional',
-        method: data.method ? data.method: 'manual',
+        method: data.method ? data.method : 'manual',
         maintainer: this.testCaseDefaultValue['责任人'] ? this.testCaseDefaultValue['责任人'] : data.maintainer,
         priority: priorityDefaultValue,
         prerequisite: "",
@@ -362,7 +362,13 @@ name: "TestCaseMinder",
         stepDescription: "",
         expectedResult: "",
         status: this.testCaseDefaultValue['用例状态'],
-        steps: "[]"
+        steps: [{
+          num: 1,
+          desc: '',
+          result: ''
+        }],
+        tags: "[]",
+        stepModel: "STEP"
       };
       if (data.changed) isChange = true;
       let steps = [];