fix 领红包加锁

src/main/java/com/tailbet/controller/RedPacketController.java

@@ -7,6 +7,7 @@ import com.tailbet.model.entity.RedPacketRecv;
 import com.tailbet.model.vo.R;
 import com.tailbet.model.vo.UserContext;
 import com.tailbet.service.IRedPacketService;
+import com.tailbet.util.RedisLockUtil;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.*;
 
@@ -42,7 +43,12 @@ public class RedPacketController {
     public R<RedPacketRecv> receiveRp(@RequestBody ReceiveRpDTO dto) {
         try {
             Long userId = UserContext.getUserId();
-            var recv = redPacketService.receiveRp(dto.getRpId(), userId);
+            // 使用分布式锁防止多领
+            var recv = RedisLockUtil.lock("rp:receive:" + dto.getRpId(),
+                    () -> redPacketService.receiveRp(dto.getRpId(), userId));
+            if (recv == null) {
+                return R.fail("领取失败，请重试");
+            }
             return R.ok(recv);
         } catch (RuntimeException e) {
             return R.fail(e.getMessage());