feat: 注销账号时级联删除用户记录

- 注销账号时删除用户的所有测算记录
- 添加@Transactional注解确保事务一致性

src/main/java/xuan/service/UserInfoService.java

@@ -2,6 +2,7 @@ package xuan.service;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 import xuan.entity.UserInfo;
 import xuan.repository.UserInfoRepository;
 
@@ -13,6 +14,9 @@ public class UserInfoService {
     @Autowired
     private UserInfoRepository userInfoRepository;
     
+    @Autowired
+    private DeductRecordService deductRecordService;
+    
     public UserInfo loginOrRegister(String openId, String nickname, String avatarUrl) {
         UserInfo user = userInfoRepository.findByOpenId(openId);
         if (user != null) {
@@ -109,9 +113,11 @@ public class UserInfoService {
         return null;
     }
     
+    @Transactional
     public boolean deleteAccount(String userId) {
         UserInfo user = userInfoRepository.findByUserId(userId);
         if (user != null) {
+            deductRecordService.deleteByUserId(userId);
             userInfoRepository.delete(user);
             return true;
         }