update：test_plan增加4个字段：planned_start_time、planned_end_time、actual_start_time、actual_end_time

frontend/src/i18n/zh-CN.js

@@ -730,6 +730,10 @@ export default {
       plan_status_prepare: "未开始",
       plan_status_running: "进行中",
       plan_status_completed: "已完成",
+      planned_start_time: "计划开始",
+      planned_end_time: "计划结束",
+      actual_start_time: "实际开始",
+      actual_end_time: "实际结束",
       plan_delete_confirm: "将删除该测试计划下所有用例，确认删除测试计划: ",
       plan_delete: "删除计划",
     },