feat: 移除NEW状态链接的过期时间设置，调整过期状态逻辑

src/main/java/com/gameplatform/server/service/link/LinkGenerationService.java

@@ -72,11 +72,11 @@ public class LinkGenerationService {
         // 从配置表获取每次副本的奖励点数
         int perTimeQuantity = systemConfigService.getDefaultQuantity();
         long needPoints = (long) times;  // 只扣times，不乘以perTimeQuantity
-        int expireHours = systemConfigService.getConfigValueAsInt("link.expire-hours", 2);
+        // 移除expireHours配置，因为NEW状态不设置过期时间
         
         if (log.isDebugEnabled()) {
-            log.debug("generateLinks operatorId={} operatorType={} times={} linkCount={} perTimeQuantity={} needPoints={} expireHours={}",
+            log.debug("generateLinks operatorId={} operatorType={} times={} linkCount={} perTimeQuantity={} needPoints={}",
-                    operatorId, operatorType, times, linkCount, perTimeQuantity, needPoints, expireHours);
+                    operatorId, operatorType, times, linkCount, perTimeQuantity, needPoints);
         }
         
         if (!isAdminOperator) {
@@ -94,7 +94,7 @@ public class LinkGenerationService {
         batch.setOperatorId(operatorId);
         linkBatchMapper.insert(batch);
 
-        LocalDateTime expireAt = LocalDateTime.now().plusHours(expireHours);
+        // NEW状态的链接不设置过期时间，只有激活使用时才设置过期时间
         List<LinkTask> tasks = new ArrayList<>();
         for (int i = 0; i < linkCount; i++) {  // 生成linkCount个链接
             LinkTask t = new LinkTask();
@@ -102,7 +102,7 @@ public class LinkGenerationService {
             t.setAgentId(operator.getId());
             t.setCodeNo(generateCodeNo());
             t.setTokenHash(DigestUtils.sha256Hex(generateToken()));
-            t.setExpireAt(expireAt);
+            t.setExpireAt(null);  // NEW状态不设置过期时间
             t.setStatus("NEW");
             linkTaskMapper.insert(t);
             tasks.add(t);
@@ -133,7 +133,7 @@ public class LinkGenerationService {
         GenerateResult result = new GenerateResult();
         result.setBatchId(batch.getId());
         result.setNeedPoints(needPoints);
-        result.setExpireAt(expireAt);
+        result.setExpireAt(null);  // NEW状态无过期时间
         result.setCodeNos(tasks.stream().map(LinkTask::getCodeNo).toList());
         return result;
     }

src/main/java/com/gameplatform/server/service/link/LinkListService.java

@@ -155,17 +155,22 @@ public class LinkListService {
         item.setUpdatedAt(task.getUpdatedAt());
         
         // 计算是否过期和剩余时间
+        // expire_at字段只在状态为EXPIRED时才有值，表示过期时间戳
         LocalDateTime now = LocalDateTime.now();
-        boolean isExpired = task.getExpireAt().isBefore(now);
+        boolean isExpired = "EXPIRED".equals(task.getStatus());
-        item.setIsExpired(isExpired);
+        long remainingSeconds = 0L;
         
+        // 根据不同状态计算剩余时间
         if (isExpired) {
-            item.setRemainingSeconds(0L);
+            remainingSeconds = 0L;
         } else {
-            long remainingSeconds = ChronoUnit.SECONDS.between(now, task.getExpireAt());
+            // 非过期状态显示为永不过期
-            item.setRemainingSeconds(Math.max(0, remainingSeconds));
+            remainingSeconds = Long.MAX_VALUE;
         }
         
+        item.setIsExpired(isExpired);
+        item.setRemainingSeconds(remainingSeconds);
+        
         // 从批次信息中获取任务详情
         if (batch != null) {
             item.setQuantity(batch.getQuantity());

src/main/java/com/gameplatform/server/service/link/LinkStatusService.java

@@ -464,8 +464,10 @@ public class LinkStatusService {
             // 2. 检查链接任务是否过期
             if (linkTask.getExpireAt() != null && linkTask.getExpireAt().isBefore(LocalDateTime.now())) {
                 log.warn("链接任务已过期: expireAt={}", linkTask.getExpireAt());
+                LocalDateTime now = LocalDateTime.now();
                 linkTask.setStatus("EXPIRED");
-                linkTask.setUpdatedAt(LocalDateTime.now());
+                linkTask.setExpireAt(now);  // 设置过期时间戳
+                linkTask.setUpdatedAt(now);
                 linkTaskMapper.update(linkTask);
                 
                 UserLinkStatusResponse response = new UserLinkStatusResponse();
@@ -479,8 +481,10 @@ public class LinkStatusService {
                 if (linkTask.getQrCreatedAt() != null && 
                     linkTask.getQrCreatedAt().isBefore(LocalDateTime.now().minusMinutes(10))) {
                     log.warn("选择设备已超过10分钟未登录，链接过期: qrCreatedAt={}", linkTask.getQrCreatedAt());
+                    LocalDateTime now = LocalDateTime.now();
                     linkTask.setStatus("EXPIRED");
-                    linkTask.setUpdatedAt(LocalDateTime.now());
+                    linkTask.setExpireAt(now);  // 设置过期时间戳
+                    linkTask.setUpdatedAt(now);
                     linkTaskMapper.update(linkTask);
                     
                     UserLinkStatusResponse response = new UserLinkStatusResponse();
@@ -633,6 +637,7 @@ public class LinkStatusService {
                     
                     // 将链接状态设置为过期
                     linkTask.setStatus("EXPIRED");
+                    linkTask.setExpireAt(now);  // 设置过期时间戳
                     linkTask.setUpdatedAt(now);
                     linkTaskMapper.updateById(linkTask);
                     log.info("链接状态已更新为EXPIRED: linkTaskId={}, 更新时间={}", linkTask.getId(), now);