fix: 退出登录时删除用户订阅并清理订阅缓存

- 事务内删除用户所有订阅记录
- 事务后清理订阅缓存、套餐缓存、节点缓存

internal/logic/public/user/unbindDeviceLogic.go

@@ -56,7 +56,10 @@ func (l *UnbindDeviceLogic) logoutUnbind(userInfo *user.User, device *user.Devic
 	// 2. 事务前收集受影响的家庭成员 ID（事务会改变家庭关系，之后查不到）
 	familyMemberIDs := l.collectFamilyMemberIDs(userInfo.Id)
 
-	// 3. 事务：解绑家庭组 + 解绑非 device 的登录方式
+	// 3. 事务前查出用户订阅，用于事务后清订阅缓存
+	userSubscribes, _ := l.svcCtx.UserModel.QueryUserSubscribe(l.ctx, userInfo.Id)
+
+	// 4. 事务：解绑家庭组 + 解绑非 device 的登录方式 + 删除订阅
 	err := l.svcCtx.DB.Transaction(func(tx *gorm.DB) error {
 		// 解绑家庭组（owner 解散整个家庭，member 退出家庭）
 		exitHelper := newFamilyExitHelper(l.ctx, l.svcCtx)
@@ -70,6 +73,12 @@ func (l *UnbindDeviceLogic) logoutUnbind(userInfo *user.User, device *user.Devic
 			return errors.Wrapf(xerr.NewErrCode(xerr.DatabaseDeletedError), "delete non-device auth methods failed")
 		}
 
+		// 删除该用户的所有订阅（解绑后不应保留原账号的订阅）
+		if err := tx.Where("user_id = ?", userInfo.Id).
+			Delete(&user.Subscribe{}).Error; err != nil {
+			return errors.Wrapf(xerr.NewErrCode(xerr.DatabaseUpdateError), "delete user subscribes failed")
+		}
+
 		return nil
 	})
 	if err != nil {
@@ -104,7 +113,44 @@ func (l *UnbindDeviceLogic) logoutUnbind(userInfo *user.User, device *user.Devic
 		)
 	}
 
-	// 8. 清理受影响的家庭成员缓存（家庭解散后成员需感知变化）
+	// 8. 清理订阅相关缓存
+	if len(userSubscribes) > 0 {
+		subscribeModels := make([]*user.Subscribe, 0, len(userSubscribes)+1)
+		subscribeModels = append(subscribeModels, &user.Subscribe{UserId: userInfo.Id})
+		subscribeIDSet := make(map[int64]struct{})
+		for _, sub := range userSubscribes {
+			subscribeModels = append(subscribeModels, &user.Subscribe{
+				Id:          sub.Id,
+				UserId:      sub.UserId,
+				SubscribeId: sub.SubscribeId,
+				Token:       sub.Token,
+			})
+			if sub.SubscribeId > 0 {
+				subscribeIDSet[sub.SubscribeId] = struct{}{}
+			}
+		}
+		if clearErr := l.svcCtx.UserModel.ClearSubscribeCache(l.ctx, subscribeModels...); clearErr != nil {
+			l.Errorw("clear subscribe cache failed",
+				logger.Field("user_id", userInfo.Id),
+				logger.Field("error", clearErr.Error()),
+			)
+		}
+		for subscribeID := range subscribeIDSet {
+			if clearErr := l.svcCtx.SubscribeModel.ClearCache(l.ctx, subscribeID); clearErr != nil {
+				l.Errorw("clear subscribe plan cache failed",
+					logger.Field("subscribe_id", subscribeID),
+					logger.Field("error", clearErr.Error()),
+				)
+			}
+		}
+		if clearErr := l.svcCtx.NodeModel.ClearServerAllCache(l.ctx); clearErr != nil {
+			l.Errorw("clear server cache failed",
+				logger.Field("error", clearErr.Error()),
+			)
+		}
+	}
+
+	// 9. 清理受影响的家庭成员缓存（家庭解散后成员需感知变化）
 	for _, memberID := range familyMemberIDs {
 		if memberUser, findErr := l.svcCtx.UserModel.FindOne(l.ctx, memberID); findErr == nil {
 			if clearErr := l.svcCtx.UserModel.ClearUserCache(l.ctx, memberUser); clearErr != nil {