feat(voucher): 优化券码领取接口返回结果

- 添加success和message字段到VoucherCodeResp响应类
- 修改券码领取逻辑，失败时不抛出异常而是返回失败结果
- 实现券码状态、用户权限和批次验证的统一响应格式
- 成功领取时设置success为true并返回成功消息
- 失败时设置success为false并返回具体失败原因
- 保持券码基础信息在失败情况下仍然返回给前端

src/main/java/com/ycwl/basic/pricing/dto/resp/VoucherCodeResp.java

@@ -7,6 +7,15 @@ import java.util.Date;
 
 @Data
 public class VoucherCodeResp {
+    /**
+     * 领取是否成功
+     */
+    private Boolean success;
+    /**
+     * 结果描述（失败时为原因说明）
+     */
+    private String message;
+
     private Long id;
     private Long batchId;
     private String batchName;

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

@@ -80,7 +80,7 @@ public VoucherCodeResp claimVoucher(VoucherClaimReq req) {
 
     Long userId = Long.valueOf(BaseContextHandler.getUserId());
 
-    // 验证券码是否存在且未被领取
+    // 查询券码
     LambdaQueryWrapper<PriceVoucherCode> wrapper = new LambdaQueryWrapper<>();
     wrapper.eq(PriceVoucherCode::getCode, req.getCode())
             .eq(PriceVoucherCode::getDeleted, 0);
@@ -90,18 +90,29 @@ public VoucherCodeResp claimVoucher(VoucherClaimReq req) {
         throw new BizException(400, "券码不存在");
     }
 
+    // 查询批次信息，用于构建响应
+    PriceVoucherBatchConfig batch = voucherBatchMapper.selectById(voucherCode.getBatchId());
+
+    // 券码已找到，后续校验失败时仍返回 scenicId 等信息
     if (!Objects.equals(voucherCode.getStatus(), VoucherCodeStatus.UNCLAIMED.getCode())) {
-        throw new BizException(400, "券码已被领取或已使用");
+        VoucherCodeResp resp = convertToResp(voucherCode, batch);
+        resp.setSuccess(false);
+        resp.setMessage("券码已被领取或已使用");
+        return resp;
     }
 
     if (!canClaimVoucher(userId, voucherCode.getScenicId())) {
-        throw new BizException(400, "该用户在此景区已领取过券码");
+        VoucherCodeResp resp = convertToResp(voucherCode, batch);
+        resp.setSuccess(false);
+        resp.setMessage("该用户在此景区已领取过券码");
+        return resp;
     }
 
-    // 获取券码所属批次
-    PriceVoucherBatchConfig batch = voucherBatchMapper.selectById(voucherCode.getBatchId());
     if (batch == null || batch.getDeleted() == 1) {
-        throw new BizException(400, "券码批次不存在");
+        VoucherCodeResp resp = convertToResp(voucherCode, batch);
+        resp.setSuccess(false);
+        resp.setMessage("券码批次不存在");
+        return resp;
     }
 
     // 更新券码状态
@@ -117,7 +128,10 @@ public VoucherCodeResp claimVoucher(VoucherClaimReq req) {
 
     voucherBatchService.updateBatchClaimedCount(batch.getId());
 
-    return convertToResp(voucherCode, batch);
+    VoucherCodeResp resp = convertToResp(voucherCode, batch);
+    resp.setSuccess(true);
+    resp.setMessage("领取成功");
+    return resp;
 }
     
     @Override