feat(设备绑定): 添加用户数据迁移功能以支持设备重新绑定

在设备重新绑定到新用户时，自动迁移旧用户的订单、订阅和余额数据
移除游客订单特殊处理逻辑，统一所有订单处理流程
更新设备绑定文档说明新的静默登录机制

internal/logic/auth/bindDeviceLogic.go

@@ -167,6 +167,16 @@ func (l *BindDeviceLogic) rebindDeviceToNewUser(deviceInfo *user.Device, ip, use
 
 		// Only disable old user if they have no other auth methods
 		if nonDeviceAuthCount == 0 {
+			// Migrate user data from old user to new user before disabling
+			if err := l.migrateUserData(db, oldUserId, newUserId); err != nil {
+				l.Errorw("failed to migrate user data",
+					logger.Field("old_user_id", oldUserId),
+					logger.Field("new_user_id", newUserId),
+					logger.Field("error", err.Error()),
+				)
+				return errors.Wrapf(xerr.NewErrCode(xerr.DatabaseUpdateError), "migrate user data failed: %v", err)
+			}
+
 			falseVal := false
 			if err := db.Model(&user.User{}).Where("id = ?", oldUserId).Update("enable", &falseVal).Error; err != nil {
 				l.Errorw("failed to disable old user",
@@ -176,8 +186,9 @@ func (l *BindDeviceLogic) rebindDeviceToNewUser(deviceInfo *user.Device, ip, use
 				return errors.Wrapf(xerr.NewErrCode(xerr.DatabaseUpdateError), "disable old user failed: %v", err)
 			}
 
-			l.Infow("disabled old user (no other auth methods)",
+			l.Infow("disabled old user after data migration (no other auth methods)",
 				logger.Field("old_user_id", oldUserId),
+				logger.Field("new_user_id", newUserId),
 			)
 		} else {
 			l.Infow("old user has other auth methods, not disabling",
@@ -232,3 +243,72 @@ func (l *BindDeviceLogic) rebindDeviceToNewUser(deviceInfo *user.Device, ip, use
 
 	return nil
 }
+
+// migrateUserData migrates user data from old user to new user
+// This includes orders, subscriptions, balance, and other user-related data
+func (l *BindDeviceLogic) migrateUserData(db *gorm.DB, oldUserId, newUserId int64) error {
+	l.Infow("starting user data migration",
+		logger.Field("old_user_id", oldUserId),
+		logger.Field("new_user_id", newUserId),
+	)
+
+	// Migrate orders - using table name directly
+	if err := db.Table("order").Where("user_id = ?", oldUserId).Update("user_id", newUserId).Error; err != nil {
+		l.Errorw("failed to migrate orders",
+			logger.Field("old_user_id", oldUserId),
+			logger.Field("new_user_id", newUserId),
+			logger.Field("error", err.Error()),
+		)
+		return err
+	}
+
+	// Migrate user subscriptions - using Subscribe model
+	if err := db.Model(&user.Subscribe{}).Where("user_id = ?", oldUserId).Update("user_id", newUserId).Error; err != nil {
+		l.Errorw("failed to migrate user subscriptions",
+			logger.Field("old_user_id", oldUserId),
+			logger.Field("new_user_id", newUserId),
+			logger.Field("error", err.Error()),
+		)
+		return err
+	}
+
+	// Migrate user balance and gift amount
+	var oldUser user.User
+	if err := db.Where("id = ?", oldUserId).First(&oldUser).Error; err != nil {
+		l.Errorw("failed to get old user data",
+			logger.Field("old_user_id", oldUserId),
+			logger.Field("error", err.Error()),
+		)
+		return err
+	}
+
+	// Add old user's balance and gift to new user
+	if oldUser.Balance > 0 || oldUser.GiftAmount > 0 {
+		if err := db.Model(&user.User{}).Where("id = ?", newUserId).Updates(map[string]interface{}{
+			"balance":     gorm.Expr("balance + ?", oldUser.Balance),
+			"gift_amount": gorm.Expr("gift_amount + ?", oldUser.GiftAmount),
+		}).Error; err != nil {
+			l.Errorw("failed to migrate user balance and gift",
+				logger.Field("old_user_id", oldUserId),
+				logger.Field("new_user_id", newUserId),
+				logger.Field("old_balance", oldUser.Balance),
+				logger.Field("old_gift", oldUser.GiftAmount),
+				logger.Field("error", err.Error()),
+			)
+			return err
+		}
+	}
+
+	// Migrate other user-related tables if needed
+	// Note: We don't migrate auth methods as they are handled separately
+	// Note: Traffic usage (Upload/Download) is tracked at subscription level, not user level
+
+	l.Infow("user data migration completed",
+		logger.Field("old_user_id", oldUserId),
+		logger.Field("new_user_id", newUserId),
+		logger.Field("migrated_balance", oldUser.Balance),
+		logger.Field("migrated_gift", oldUser.GiftAmount),
+	)
+
+	return nil
+}

internal/logic/public/order/closeOrderLogic.go

@@ -61,18 +61,7 @@ func (l *CloseOrderLogic) CloseOrder(req *types.CloseOrderRequest) error {
 			)
 			return err
 		}
-		// If User ID is 0, it means that the order is a guest order and does not need to be refunded, the order can be deleted directly
-		if orderInfo.UserId == 0 {
-			err = tx.Model(&order.Order{}).Where("order_no = ?", req.OrderNo).Delete(&order.Order{}).Error
-			if err != nil {
-				l.Errorw("[CloseOrder] Delete order failed",
-					logger.Field("error", err.Error()),
-					logger.Field("orderNo", req.OrderNo),
-				)
-				return err
-			}
-			return nil
-		}
+		// All orders now have associated users, no special handling needed for guest orders
 		// refund deduction amount to user deduction balance
 		if orderInfo.GiftAmount > 0 {
 			userInfo, err := l.svcCtx.UserModel.FindOne(l.ctx, orderInfo.UserId)