feat(coupon): 添加优惠券领取后有效期功能

- 在 PriceCouponClaimRecord 实体中添加过期时间字段
- 在 PriceCouponConfig 实体中添加领取后有效天数配置
- 更新查询可用优惠券的 SQL 条件以过滤过期券
- 修改插入领用记录的 SQL 语句以包含过期时间
- 实现领取时根据配置计算过期时间的逻辑

src/main/java/com/ycwl/basic/pricing/entity/PriceCouponClaimRecord.java

@@ -33,7 +33,13 @@ public class PriceCouponClaimRecord {
      * 领取时间
      */
     private Date claimTime;
-    
+
+    /**
+     * 过期时间（根据领取时间+领取后有效期计算）
+     */
+    @TableField("expire_time")
+    private Date expireTime;
+
     /**
      * 使用时间
      */

src/main/java/com/ycwl/basic/pricing/entity/PriceCouponConfig.java

@@ -85,7 +85,12 @@ public class PriceCouponConfig {
      * 失效时间
      */
     private Date validUntil;
-    
+
+    /**
+     * 领取后有效天数（NULL表示不限制，仅使用全局有效期）
+     */
+    private Integer validDaysAfterClaim;
+
     /**
      * 是否启用
      */

src/main/java/com/ycwl/basic/pricing/mapper/PriceCouponClaimRecordMapper.java

@@ -25,7 +25,8 @@ public interface PriceCouponClaimRecordMapper extends BaseMapper<PriceCouponClai
             "FROM price_coupon_claim_record r " +
             "JOIN price_coupon_config c ON r.coupon_id = c.id " +
             "WHERE r.user_id = #{userId} AND r.status = 'CLAIMED' " +
-            "AND c.is_active = 1 AND c.valid_from <= NOW() AND c.valid_until > NOW()")
+            "AND c.is_active = 1 AND c.valid_from <= NOW() AND c.valid_until > NOW() " +
+            "AND (r.expire_time IS NULL OR r.expire_time > NOW())")
     List<PriceCouponClaimRecord> selectUserAvailableCoupons(Long userId);
     
     /**
@@ -58,8 +59,8 @@ public interface PriceCouponClaimRecordMapper extends BaseMapper<PriceCouponClai
     /**
      * 插入优惠券领用记录
      */
-    @Insert("INSERT INTO price_coupon_claim_record (coupon_id, user_id, claim_time, status, scenic_id, create_time, update_time) " +
+    @Insert("INSERT INTO price_coupon_claim_record (coupon_id, user_id, claim_time, expire_time, status, scenic_id, create_time, update_time) " +
-            "VALUES (#{couponId}, #{userId}, NOW(), #{status}, #{scenicId}, NOW(), NOW())")
+            "VALUES (#{couponId}, #{userId}, NOW(), #{expireTime}, #{status}, #{scenicId}, NOW(), NOW())")
     int insertClaimRecord(PriceCouponClaimRecord record);
     
     /**

src/main/java/com/ycwl/basic/pricing/service/impl/CouponServiceImpl.java

@@ -358,6 +358,15 @@ public class CouponServiceImpl implements ICouponService {
             claimRecord.setCouponId(request.getCouponId());
             claimRecord.setUserId(request.getUserId());
             claimRecord.setClaimTime(claimTime);
+
+            // 如果配置了领取后有效天数，计算过期时间
+            if (coupon.getValidDaysAfterClaim() != null && coupon.getValidDaysAfterClaim() > 0) {
+                java.util.Calendar calendar = java.util.Calendar.getInstance();
+                calendar.setTime(claimTime);
+                calendar.add(java.util.Calendar.DAY_OF_MONTH, coupon.getValidDaysAfterClaim());
+                claimRecord.setExpireTime(calendar.getTime());
+            }
+
             claimRecord.setStatus(CouponStatus.CLAIMED);
             claimRecord.setScenicId(request.getScenicId());
             claimRecord.setCreateTime(claimTime);