docs(coupon): 更新优惠券接口的注释文档

更新getPointRangesAPI和getCouponListAPI的JSDoc注释，简化积分范围描述并添加优惠券列表的详细字段说明

 /*
  * @Date: 2024-01-01 00:00:00
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-09-05 16:26:31
- * @FilePath: /lls_program/src/api/reward.js
+ * @LastEditTime: 2025-09-08 12:10:33
+ * @FilePath: /lls_program/src/api/coupon.js
  * @Description: 优惠券相关接口
  */
 import { fn, fetch } from './fn';
@@ -39,9 +39,7 @@ export const getCouponHomeAPI = (params) => fn(fetch.get(Api.COUPON_HOME, params
  * @returns {Object} response - 响应对象
  * @returns {number} response.code - 响应状态码
  * @returns {string} response.msg - 响应消息
- * @returns {Array} response.data[] - 响应数据
- * @returns {string} response.data[].id - id
- * @returns {string} response.data[].points - 积分范围，例如：100-200
+ * @returns {Array} response.data[] - 响应数据 积分范围，例如：100-200
  */
 export const getPointRangesAPI = (params) => fn(fetch.get(Api.POINT_RANGES, params));
 
@@ -57,7 +55,12 @@ export const getPointRangesAPI = (params) => fn(fetch.get(Api.POINT_RANGES, para
  * @returns {Object} response - 响应对象
  * @returns {number} response.code - 响应状态码
  * @returns {string} response.msg - 响应消息
- * @returns {Object} response.data - 响应数据
+ * @returns {Object} response.data[] - 响应数据
+ * @returns {string} response.data[].id - 优惠券ID
+ * @returns {string} response.data[].title - 优惠券标题
+ * @returns {string} response.data[].thumbnail - 优惠券缩略图
+ * @returns {string} response.data[].points_cost - 需要多少积分兑换
+ * @returns {Boolean} response.data[].can_redeem - 是否可以兑换：true=可以，false=不可以
  */
 export const getCouponListAPI = (params = {}) => fn(fetch.get(Api.COUPON_LIST, params));