fix(coupon): 修复优惠券重复领取和状态检查逻辑

- 修改数据库查询方法返回类型为List以支持多条记录查询
- 更新AutoCouponServiceImpl中的重复领取检查逻辑
- 在CouponServiceImpl中实现可用优惠券筛选功能
- 优化优惠券状态验证逻辑并改进错误信息提示
- 修复使用优惠券时的状态判断条件

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

@@ -33,7 +33,7 @@ public interface PriceCouponClaimRecordMapper extends BaseMapper<PriceCouponClai
      */
     @Select("SELECT * FROM price_coupon_claim_record " +
             "WHERE user_id = #{userId} AND coupon_id = #{couponId}")
-    PriceCouponClaimRecord selectUserCouponRecord(@Param("userId") Long userId,
+    List<PriceCouponClaimRecord> selectUserCouponRecords(@Param("userId") Long userId,
                                                   @Param("couponId") Long couponId);
 
     /**

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

@@ -54,12 +54,14 @@ public class AutoCouponServiceImpl implements IAutoCouponService {
             for (Long couponId : couponIds) {
                 try {
                     // 检查用户是否已领取过该券（领券即消耗首次资格）
-                    PriceCouponClaimRecord existingRecord = couponClaimRecordMapper.selectUserCouponRecord(
+                    List<PriceCouponClaimRecord> existingRecords = couponClaimRecordMapper.selectUserCouponRecords(
                             memberId,
                             couponId
                     );
 
-                    if (existingRecord != null) {
+                    if (existingRecords != null && !existingRecords.isEmpty()) {
+                        // 只要有记录（无论状态），都算已领取过
+                        PriceCouponClaimRecord existingRecord = existingRecords.get(0);
                         log.debug("用户已领取过优惠券，跳过: memberId={}, couponId={}, claimTime={}",
                                 memberId, couponId, existingRecord.getClaimTime());
                         skipCount++;

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

@@ -223,15 +223,23 @@ public class CouponServiceImpl implements ICouponService {
     @Override
     @Transactional
     public CouponUseResult useCoupon(CouponUseRequest request) {
-        PriceCouponClaimRecord record = couponClaimRecordMapper.selectUserCouponRecord(
+        List<PriceCouponClaimRecord> records = couponClaimRecordMapper.selectUserCouponRecords(
                 request.getUserId(), request.getCouponId());
         
-        if (record == null) {
+        if (records == null || records.isEmpty()) {
             throw new CouponInvalidException("用户未拥有该优惠券");
         }
+
+        // 查找一张可用的优惠券(状态为CLAIMED)
+        PriceCouponClaimRecord record = records.stream()
+                .filter(r -> r.getStatus() == CouponStatus.CLAIMED)
+                .findFirst()
+                .orElse(null);
         
-        if (record.getStatus() != CouponStatus.CLAIMED) {
-            throw new CouponInvalidException("优惠券状态无效: " + record.getStatus());
+        if (record == null) {
+            // 如果没有可用的，抛出异常。为了错误信息准确，可以检查最后一张的状态
+            CouponStatus lastStatus = records.getFirst().getStatus();
+            throw new CouponInvalidException("优惠券状态无效: " + lastStatus);
         }
         
         int updateCount = couponConfigMapper.incrementUsedQuantity(request.getCouponId());