feat(teacher): 添加老师置顶与取消置顶打卡的API接口

新增 TEACHER_PIN 和 TEACHER_UNPIN 两个API端点，并导出对应的 teacherPinCheckinAPI 和 teacherUnpinCheckinAPI 函数，以支持老师对打卡进行置顶操作。

 /*
  * @Date: 2025-06-23 11:46:21
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2026-01-23 16:26:14
+ * @LastEditTime: 2026-01-26 15:08:43
  * @FilePath: /mlaj/src/api/teacher.js
  * @Description: 文件描述
  */
@@ -18,6 +18,8 @@ const Api = {
   STUDENT_STAT: '/srv/?a=user&t=student_stat',
   STUDENT_CHECKIN_LIST: '/srv/?a=checkin&t=student_checkin_list',
   STUDENT_UPLOAD_LIST: '/srv/?a=checkin&t=student_upload_list',
+  TEACHER_PIN: '/srv/?a=checkin&t=teacher_pin',
+  TEACHER_UNPIN: '/srv/?a=checkin&t=teacher_unpin',
   STUDENT_CHECKIN_FEEDBACK_LIST: '/srv/?a=feedback&t=list',
   ADD_CHECKIN_FEEDBACK: '/srv/?a=feedback&t=add',
   DEL_CHECKIN_FEEDBACK: '/srv/?a=feedback&t=del',
@@ -146,6 +148,20 @@ export const getStudentCheckinListAPI = (params) => fn(fetch.get(Api.STUDENT_CHE
 export const getStudentUploadListAPI = (params) => fn(fetch.get(Api.STUDENT_UPLOAD_LIST, params))
 
 /**
+ * 老师置顶打卡
+ * @param {*} checkin_id 打卡ID
+ * @returns {Object} code 0=失败，1=成功, msg
+ */
+export const teacherPinCheckinAPI = (params) => fn(fetch.post(Api.TEACHER_PIN, params))
+
+/**
+ * 老师取消置顶打卡
+ * @param {*} checkin_id 打卡ID
+ * @returns {Object} code 0=失败，1=成功, msg
+ */
+export const teacherUnpinCheckinAPI = (params) => fn(fetch.post(Api.TEACHER_UNPIN, params))
+
+/**
  * 获取老师点评列表
  * @param {*} user_id 学员ID
  * @param {*} group_id 课程ID