f

internal/app/app.go

@@ -269,6 +269,9 @@ func (a *Application) autoMigrate(db *gorm.DB) error {
 		&subordinateEntities.SubordinateInvitation{},
 		&subordinateEntities.UserSubordinateLink{},
 		&subordinateEntities.SubordinateWalletAllocation{},
+		&subordinateEntities.SubordinateQuotaPurchase{},
+		&subordinateEntities.UserProductQuotaAccount{},
+		&subordinateEntities.UserProductQuotaLedger{},
 
 		// 任务域
 		&taskEntities.AsyncTask{},

internal/application/subordinate/dto/commands/subordinate_commands.go

@@ -53,3 +53,26 @@ type RemoveChildSubscriptionCommand struct {
 	ChildUserID     string `json:"child_user_id" binding:"required"`
 	SubscriptionID  string `json:"subscription_id" binding:"required"`
 }
+
+// PurchaseChildQuotaCommand 主账号为子账号购买调用额度
+type PurchaseChildQuotaCommand struct {
+	ParentUserID string
+	ChildUserID  string `json:"child_user_id" binding:"required"`
+	ProductID    string `json:"product_id" binding:"required"`
+	CallCount    int64  `json:"call_count" binding:"required,min=1"`
+	VerifyCode   string `json:"verify_code" binding:"required,len=6"`
+}
+
+// ListChildQuotaPurchasesCommand 下属额度购买记录查询
+type ListChildQuotaPurchasesCommand struct {
+	ParentUserID string
+	ChildUserID  string `json:"child_user_id" form:"child_user_id" binding:"required"`
+	Page         int    `json:"page" form:"page"`
+	PageSize     int    `json:"page_size" form:"page_size"`
+}
+
+// ListChildQuotaAccountsCommand 下属额度账户查询
+type ListChildQuotaAccountsCommand struct {
+	ParentUserID string
+	ChildUserID  string `json:"child_user_id" form:"child_user_id" binding:"required"`
+}

internal/application/subordinate/dto/responses/subordinate_responses.go

@@ -55,3 +55,28 @@ type ChildSubscriptionItem struct {
 	UIComponentPrice string    `json:"ui_component_price"`
 	CreatedAt        time.Time `json:"created_at"`
 }
+
+// ChildQuotaPurchaseItem 下属额度购买记录
+type ChildQuotaPurchaseItem struct {
+	ID          string    `json:"id"`
+	ProductID   string    `json:"product_id"`
+	CallCount   int64     `json:"call_count"`
+	UnitPrice   string    `json:"unit_price"`
+	TotalAmount string    `json:"total_amount"`
+	BusinessRef string    `json:"business_ref"`
+	CreatedAt   time.Time `json:"created_at"`
+}
+
+// ChildQuotaPurchaseListResponse 下属额度购买记录列表
+type ChildQuotaPurchaseListResponse struct {
+	Total int64                    `json:"total"`
+	Items []ChildQuotaPurchaseItem `json:"items"`
+}
+
+// ChildQuotaAccountItem 下属产品额度账户
+type ChildQuotaAccountItem struct {
+	ProductID      string `json:"product_id"`
+	TotalQuota     int64  `json:"total_quota"`
+	UsedQuota      int64  `json:"used_quota"`
+	AvailableQuota int64  `json:"available_quota"`
+}

internal/application/subordinate/subordinate_application_service.go

@@ -17,4 +17,8 @@ type SubordinateApplicationService interface {
 	AssignChildSubscription(ctx context.Context, cmd *commands.AssignChildSubscriptionCommand) error
 	ListChildSubscriptions(ctx context.Context, cmd *commands.ListChildSubscriptionsCommand) ([]responses.ChildSubscriptionItem, error)
 	RemoveChildSubscription(ctx context.Context, cmd *commands.RemoveChildSubscriptionCommand) error
+	PurchaseChildQuota(ctx context.Context, cmd *commands.PurchaseChildQuotaCommand) error
+	ListChildQuotaPurchases(ctx context.Context, cmd *commands.ListChildQuotaPurchasesCommand) (*responses.ChildQuotaPurchaseListResponse, error)
+	ListChildQuotaAccounts(ctx context.Context, cmd *commands.ListChildQuotaAccountsCommand) ([]responses.ChildQuotaAccountItem, error)
+	ListMyQuotaAccounts(ctx context.Context, userID string) ([]responses.ChildQuotaAccountItem, error)
 }

internal/application/subordinate/subordinate_application_service_impl.go

@@ -391,3 +391,218 @@ func (s *SubordinateApplicationServiceImpl) RemoveChildSubscription(ctx context.
 	}
 	return s.productSub.CancelSubscription(ctx, cmd.SubscriptionID)
 }
+
+// PurchaseChildQuota 主账号为子账号购买调用额度（按子账号订阅价结算）
+func (s *SubordinateApplicationServiceImpl) PurchaseChildQuota(ctx context.Context, cmd *commands.PurchaseChildQuotaCommand) error {
+	if cmd.CallCount <= 0 {
+		return fmt.Errorf("购买次数必须大于0")
+	}
+
+	parentUser, err := s.userRepo.GetByID(ctx, cmd.ParentUserID)
+	if err != nil {
+		return fmt.Errorf("主账号信息获取失败")
+	}
+	if err := s.smsService.VerifyCode(ctx, parentUser.Phone, strings.TrimSpace(cmd.VerifyCode), user_entities.SMSSceneLogin); err != nil {
+		return fmt.Errorf("验证码错误或已过期")
+	}
+
+	lnk, err := s.subRepo.FindLinkByParentAndChild(ctx, cmd.ParentUserID, cmd.ChildUserID)
+	if err != nil {
+		return err
+	}
+	if lnk == nil || lnk.Status != subentities.LinkStatusActive {
+		return fmt.Errorf("该用户不是您的有效下属")
+	}
+
+	parentSub, err := s.productSub.GetUserSubscribedProduct(ctx, cmd.ParentUserID, cmd.ProductID)
+	if err != nil {
+		return err
+	}
+	if parentSub == nil {
+		return fmt.Errorf("主账号未订阅该产品，无法购买额度")
+	}
+	if !parentSub.Price.GreaterThan(decimal.Zero) {
+		return fmt.Errorf("主账号订阅价格异常，无法购买额度")
+	}
+
+	callCountDec := decimal.NewFromInt(cmd.CallCount)
+	totalAmount := parentSub.Price.Mul(callCountDec)
+	if !totalAmount.GreaterThan(decimal.Zero) {
+		return fmt.Errorf("购买金额必须大于0")
+	}
+
+	bizRef := uuid.New().String()
+	return s.txm.ExecuteInTx(ctx, func(txCtx context.Context) error {
+		// 购买额度前自动确保子账号存在该产品订阅，并统一为主账号订阅价
+		childSub, err := s.productSub.GetUserSubscribedProduct(txCtx, cmd.ChildUserID, cmd.ProductID)
+		if err != nil {
+			return err
+		}
+		if childSub == nil {
+			newSub := &productentities.Subscription{
+				UserID:           cmd.ChildUserID,
+				ProductID:        cmd.ProductID,
+				Price:            parentSub.Price,
+				UIComponentPrice: parentSub.UIComponentPrice,
+			}
+			if err := s.productSub.SaveSubscription(txCtx, newSub); err != nil {
+				return fmt.Errorf("为下属创建订阅失败: %w", err)
+			}
+		} else {
+			childSub.Price = parentSub.Price
+			childSub.UIComponentPrice = parentSub.UIComponentPrice
+			if err := s.productSub.SaveSubscription(txCtx, childSub); err != nil {
+				return fmt.Errorf("更新下属订阅失败: %w", err)
+			}
+		}
+
+		ok, err := s.walletRepo.UpdateBalanceByUserID(txCtx, cmd.ParentUserID, totalAmount, "subtract")
+		if err != nil {
+			return err
+		}
+		if !ok {
+			return fmt.Errorf("主账号扣款失败，请重试")
+		}
+
+		account, err := s.subRepo.FindQuotaAccount(txCtx, cmd.ChildUserID, cmd.ProductID)
+		if err != nil {
+			return err
+		}
+
+		var beforeAvailable int64
+		if account == nil {
+			account = &subentities.UserProductQuotaAccount{
+				UserID:         cmd.ChildUserID,
+				ProductID:      cmd.ProductID,
+				TotalQuota:     cmd.CallCount,
+				UsedQuota:      0,
+				AvailableQuota: cmd.CallCount,
+			}
+			beforeAvailable = 0
+			if err := s.subRepo.CreateQuotaAccount(txCtx, account); err != nil {
+				return err
+			}
+		} else {
+			beforeAvailable = account.AvailableQuota
+			account.TotalQuota += cmd.CallCount
+			account.AvailableQuota += cmd.CallCount
+			if err := s.subRepo.UpdateQuotaAccount(txCtx, account); err != nil {
+				return err
+			}
+		}
+
+		purchase := &subentities.SubordinateQuotaPurchase{
+			ParentUserID:   cmd.ParentUserID,
+			ChildUserID:    cmd.ChildUserID,
+			ProductID:      cmd.ProductID,
+			CallCount:      cmd.CallCount,
+			UnitPrice:      parentSub.Price,
+			TotalAmount:    totalAmount,
+			BusinessRef:    bizRef,
+			OperatorUserID: cmd.ParentUserID,
+		}
+		if err := s.subRepo.CreateQuotaPurchase(txCtx, purchase); err != nil {
+			return err
+		}
+
+		ledger := &subentities.UserProductQuotaLedger{
+			UserID:      cmd.ChildUserID,
+			ProductID:   cmd.ProductID,
+			ChangeType:  subentities.QuotaLedgerChangeTypePurchaseForSub,
+			DeltaQuota:  cmd.CallCount,
+			BeforeQuota: beforeAvailable,
+			AfterQuota:  beforeAvailable + cmd.CallCount,
+			SourceID:    purchase.ID,
+			OperatorID:  cmd.ParentUserID,
+			Remark:      "主账号为子账号购买额度",
+		}
+		return s.subRepo.CreateQuotaLedger(txCtx, ledger)
+	})
+}
+
+// ListChildQuotaPurchases 下属额度购买记录
+func (s *SubordinateApplicationServiceImpl) ListChildQuotaPurchases(ctx context.Context, cmd *commands.ListChildQuotaPurchasesCommand) (*responses.ChildQuotaPurchaseListResponse, error) {
+	lnk, err := s.subRepo.FindLinkByParentAndChild(ctx, cmd.ParentUserID, cmd.ChildUserID)
+	if err != nil {
+		return nil, err
+	}
+	if lnk == nil || lnk.Status != subentities.LinkStatusActive {
+		return nil, fmt.Errorf("该用户不是您的有效下属")
+	}
+
+	page := cmd.Page
+	pageSize := cmd.PageSize
+	if page < 1 {
+		page = 1
+	}
+	if pageSize < 1 || pageSize > 100 {
+		pageSize = 20
+	}
+	offset := (page - 1) * pageSize
+	rows, total, err := s.subRepo.ListQuotaPurchasesByParentAndChild(ctx, cmd.ParentUserID, cmd.ChildUserID, pageSize, offset)
+	if err != nil {
+		return nil, err
+	}
+
+	items := make([]responses.ChildQuotaPurchaseItem, 0, len(rows))
+	for _, row := range rows {
+		items = append(items, responses.ChildQuotaPurchaseItem{
+			ID:          row.ID,
+			ProductID:   row.ProductID,
+			CallCount:   row.CallCount,
+			UnitPrice:   row.UnitPrice.StringFixed(2),
+			TotalAmount: row.TotalAmount.StringFixed(2),
+			BusinessRef: row.BusinessRef,
+			CreatedAt:   row.CreatedAt,
+		})
+	}
+
+	return &responses.ChildQuotaPurchaseListResponse{
+		Total: total,
+		Items: items,
+	}, nil
+}
+
+// ListChildQuotaAccounts 下属额度账户
+func (s *SubordinateApplicationServiceImpl) ListChildQuotaAccounts(ctx context.Context, cmd *commands.ListChildQuotaAccountsCommand) ([]responses.ChildQuotaAccountItem, error) {
+	lnk, err := s.subRepo.FindLinkByParentAndChild(ctx, cmd.ParentUserID, cmd.ChildUserID)
+	if err != nil {
+		return nil, err
+	}
+	if lnk == nil || lnk.Status != subentities.LinkStatusActive {
+		return nil, fmt.Errorf("该用户不是您的有效下属")
+	}
+
+	accounts, err := s.subRepo.ListQuotaAccountsByUser(ctx, cmd.ChildUserID)
+	if err != nil {
+		return nil, err
+	}
+	items := make([]responses.ChildQuotaAccountItem, 0, len(accounts))
+	for _, account := range accounts {
+		items = append(items, responses.ChildQuotaAccountItem{
+			ProductID:      account.ProductID,
+			TotalQuota:     account.TotalQuota,
+			UsedQuota:      account.UsedQuota,
+			AvailableQuota: account.AvailableQuota,
+		})
+	}
+	return items, nil
+}
+
+// ListMyQuotaAccounts 查询当前用户额度账户（通用能力，适配所有用户）
+func (s *SubordinateApplicationServiceImpl) ListMyQuotaAccounts(ctx context.Context, userID string) ([]responses.ChildQuotaAccountItem, error) {
+	accounts, err := s.subRepo.ListQuotaAccountsByUser(ctx, userID)
+	if err != nil {
+		return nil, err
+	}
+	items := make([]responses.ChildQuotaAccountItem, 0, len(accounts))
+	for _, account := range accounts {
+		items = append(items, responses.ChildQuotaAccountItem{
+			ProductID:      account.ProductID,
+			TotalQuota:     account.TotalQuota,
+			UsedQuota:      account.UsedQuota,
+			AvailableQuota: account.AvailableQuota,
+		})
+	}
+	return items, nil
+}

internal/domains/subordinate/entities/quota.go

@@ -0,0 +1,96 @@
+package entities
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/shopspring/decimal"
+	"gorm.io/gorm"
+)
+
+const (
+	// QuotaLedgerChangeTypePurchaseForSub 主账号为子账号购买额度
+	QuotaLedgerChangeTypePurchaseForSub = "purchase_for_sub"
+)
+
+// SubordinateQuotaPurchase 主账号为子账号购买额度记录
+type SubordinateQuotaPurchase struct {
+	ID             string          `gorm:"primaryKey;type:varchar(36)" json:"id"`
+	ParentUserID   string          `gorm:"type:varchar(36);not null;index" json:"parent_user_id"`
+	ChildUserID    string          `gorm:"type:varchar(36);not null;index" json:"child_user_id"`
+	ProductID      string          `gorm:"type:varchar(36);not null;index" json:"product_id"`
+	CallCount      int64           `gorm:"type:bigint;not null" json:"call_count"`
+	UnitPrice      decimal.Decimal `gorm:"type:decimal(20,8);not null" json:"unit_price"`
+	TotalAmount    decimal.Decimal `gorm:"type:decimal(20,8);not null" json:"total_amount"`
+	BusinessRef    string          `gorm:"type:varchar(64);not null;uniqueIndex" json:"business_ref"`
+	OperatorUserID string          `gorm:"type:varchar(36);not null" json:"operator_user_id"`
+
+	CreatedAt time.Time      `gorm:"autoCreateTime" json:"created_at"`
+	UpdatedAt time.Time      `gorm:"autoUpdateTime" json:"updated_at"`
+	DeletedAt gorm.DeletedAt `gorm:"index" json:"-"`
+}
+
+func (SubordinateQuotaPurchase) TableName() string {
+	return "subordinate_quota_purchases"
+}
+
+func (q *SubordinateQuotaPurchase) BeforeCreate(tx *gorm.DB) error {
+	if q.ID == "" {
+		q.ID = uuid.New().String()
+	}
+	return nil
+}
+
+// UserProductQuotaAccount 用户产品额度账户（通用模型，适配所有用户）
+type UserProductQuotaAccount struct {
+	ID             string `gorm:"primaryKey;type:varchar(36)" json:"id"`
+	UserID         string `gorm:"type:varchar(36);not null;index:idx_user_product,unique" json:"user_id"`
+	ProductID      string `gorm:"type:varchar(36);not null;index:idx_user_product,unique" json:"product_id"`
+	TotalQuota     int64  `gorm:"type:bigint;not null;default:0" json:"total_quota"`
+	UsedQuota      int64  `gorm:"type:bigint;not null;default:0" json:"used_quota"`
+	AvailableQuota int64  `gorm:"type:bigint;not null;default:0" json:"available_quota"`
+
+	CreatedAt time.Time      `gorm:"autoCreateTime" json:"created_at"`
+	UpdatedAt time.Time      `gorm:"autoUpdateTime" json:"updated_at"`
+	DeletedAt gorm.DeletedAt `gorm:"index" json:"-"`
+}
+
+func (UserProductQuotaAccount) TableName() string {
+	return "user_product_quota_accounts"
+}
+
+func (a *UserProductQuotaAccount) BeforeCreate(tx *gorm.DB) error {
+	if a.ID == "" {
+		a.ID = uuid.New().String()
+	}
+	return nil
+}
+
+// UserProductQuotaLedger 用户产品额度流水（通用模型，适配所有用户）
+type UserProductQuotaLedger struct {
+	ID          string `gorm:"primaryKey;type:varchar(36)" json:"id"`
+	UserID      string `gorm:"type:varchar(36);not null;index" json:"user_id"`
+	ProductID   string `gorm:"type:varchar(36);not null;index" json:"product_id"`
+	ChangeType  string `gorm:"type:varchar(50);not null;index" json:"change_type"`
+	DeltaQuota  int64  `gorm:"type:bigint;not null" json:"delta_quota"`
+	BeforeQuota int64  `gorm:"type:bigint;not null" json:"before_quota"`
+	AfterQuota  int64  `gorm:"type:bigint;not null" json:"after_quota"`
+	SourceID    string `gorm:"type:varchar(36);index" json:"source_id"`
+	OperatorID  string `gorm:"type:varchar(36);not null" json:"operator_id"`
+	Remark      string `gorm:"type:varchar(255)" json:"remark"`
+
+	CreatedAt time.Time      `gorm:"autoCreateTime" json:"created_at"`
+	UpdatedAt time.Time      `gorm:"autoUpdateTime" json:"updated_at"`
+	DeletedAt gorm.DeletedAt `gorm:"index" json:"-"`
+}
+
+func (UserProductQuotaLedger) TableName() string {
+	return "user_product_quota_ledgers"
+}
+
+func (l *UserProductQuotaLedger) BeforeCreate(tx *gorm.DB) error {
+	if l.ID == "" {
+		l.ID = uuid.New().String()
+	}
+	return nil
+}

internal/domains/subordinate/repositories/subordinate_repository_interface.go

@@ -28,4 +28,15 @@ type SubordinateRepository interface {
 	// 划拨
 	CreateWalletAllocation(ctx context.Context, a *entities.SubordinateWalletAllocation) error
 	ListWalletAllocationsByParentAndChild(ctx context.Context, parentUserID, childUserID string, limit, offset int) ([]*entities.SubordinateWalletAllocation, int64, error)
+
+	// 额度购买
+	CreateQuotaPurchase(ctx context.Context, p *entities.SubordinateQuotaPurchase) error
+	ListQuotaPurchasesByParentAndChild(ctx context.Context, parentUserID, childUserID string, limit, offset int) ([]*entities.SubordinateQuotaPurchase, int64, error)
+
+	// 额度账户
+	FindQuotaAccount(ctx context.Context, userID, productID string) (*entities.UserProductQuotaAccount, error)
+	CreateQuotaAccount(ctx context.Context, account *entities.UserProductQuotaAccount) error
+	UpdateQuotaAccount(ctx context.Context, account *entities.UserProductQuotaAccount) error
+	ListQuotaAccountsByUser(ctx context.Context, userID string) ([]*entities.UserProductQuotaAccount, error)
+	CreateQuotaLedger(ctx context.Context, ledger *entities.UserProductQuotaLedger) error
 }

internal/infrastructure/database/repositories/subordinate/gorm_subordinate_repository.go

@@ -199,3 +199,67 @@ func (r *GormSubordinateRepository) ListWalletAllocationsByParentAndChild(ctx co
 	}
 	return out, total, nil
 }
+
+// CreateQuotaPurchase 创建额度购买记录
+func (r *GormSubordinateRepository) CreateQuotaPurchase(ctx context.Context, p *entities.SubordinateQuotaPurchase) error {
+	return r.withCtx(ctx).Create(p).Error
+}
+
+// ListQuotaPurchasesByParentAndChild 查询主对子额度购买记录
+func (r *GormSubordinateRepository) ListQuotaPurchasesByParentAndChild(ctx context.Context, parentUserID, childUserID string, limit, offset int) ([]*entities.SubordinateQuotaPurchase, int64, error) {
+	var list []entities.SubordinateQuotaPurchase
+	var total int64
+	q := r.withCtx(ctx).Model(&entities.SubordinateQuotaPurchase{}).Where("parent_user_id = ? AND child_user_id = ?", parentUserID, childUserID)
+	if err := q.Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+	if err := q.Order("created_at DESC").Limit(limit).Offset(offset).Find(&list).Error; err != nil {
+		return nil, 0, err
+	}
+	out := make([]*entities.SubordinateQuotaPurchase, len(list))
+	for i := range list {
+		out[i] = &list[i]
+	}
+	return out, total, nil
+}
+
+// FindQuotaAccount 查询用户产品额度账户
+func (r *GormSubordinateRepository) FindQuotaAccount(ctx context.Context, userID, productID string) (*entities.UserProductQuotaAccount, error) {
+	var account entities.UserProductQuotaAccount
+	err := r.withCtx(ctx).Where("user_id = ? AND product_id = ?", userID, productID).First(&account).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, nil
+		}
+		return nil, err
+	}
+	return &account, nil
+}
+
+// CreateQuotaAccount 创建额度账户
+func (r *GormSubordinateRepository) CreateQuotaAccount(ctx context.Context, account *entities.UserProductQuotaAccount) error {
+	return r.withCtx(ctx).Create(account).Error
+}
+
+// UpdateQuotaAccount 更新额度账户
+func (r *GormSubordinateRepository) UpdateQuotaAccount(ctx context.Context, account *entities.UserProductQuotaAccount) error {
+	return r.withCtx(ctx).Save(account).Error
+}
+
+// ListQuotaAccountsByUser 查询用户全部额度账户
+func (r *GormSubordinateRepository) ListQuotaAccountsByUser(ctx context.Context, userID string) ([]*entities.UserProductQuotaAccount, error) {
+	var list []entities.UserProductQuotaAccount
+	if err := r.withCtx(ctx).Where("user_id = ?", userID).Order("updated_at DESC").Find(&list).Error; err != nil {
+		return nil, err
+	}
+	out := make([]*entities.UserProductQuotaAccount, len(list))
+	for i := range list {
+		out[i] = &list[i]
+	}
+	return out, nil
+}
+
+// CreateQuotaLedger 创建额度流水
+func (r *GormSubordinateRepository) CreateQuotaLedger(ctx context.Context, ledger *entities.UserProductQuotaLedger) error {
+	return r.withCtx(ctx).Create(ledger).Error
+}

internal/infrastructure/http/handlers/subordinate_handler.go

@@ -209,3 +209,91 @@ func (h *SubordinateHandler) RemoveChildSubscription(c *gin.Context) {
 	}
 	h.response.Success(c, nil, "删除成功")
 }
+
+// PurchaseQuota 为下属购买额度
+func (h *SubordinateHandler) PurchaseQuota(c *gin.Context) {
+	parentID := c.GetString("user_id")
+	if parentID == "" {
+		h.response.Unauthorized(c, "未登录")
+		return
+	}
+	var cmd commands.PurchaseChildQuotaCommand
+	if err := h.validator.BindAndValidate(c, &cmd); err != nil {
+		return
+	}
+	cmd.ParentUserID = parentID
+	if err := h.app.PurchaseChildQuota(c.Request.Context(), &cmd); err != nil {
+		h.logger.Error("为下属购买额度失败", zap.Error(err))
+		h.response.BadRequest(c, err.Error())
+		return
+	}
+	h.response.Success(c, nil, "购买额度成功")
+}
+
+// ListQuotaPurchases 下属额度购买记录
+func (h *SubordinateHandler) ListQuotaPurchases(c *gin.Context) {
+	parentID := c.GetString("user_id")
+	if parentID == "" {
+		h.response.Unauthorized(c, "未登录")
+		return
+	}
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	size, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
+	cmd := &commands.ListChildQuotaPurchasesCommand{
+		ParentUserID: parentID,
+		ChildUserID:  c.Query("child_user_id"),
+		Page:         page,
+		PageSize:     size,
+	}
+	if cmd.ChildUserID == "" {
+		h.response.BadRequest(c, "child_user_id 不能为空")
+		return
+	}
+	res, err := h.app.ListChildQuotaPurchases(c.Request.Context(), cmd)
+	if err != nil {
+		h.logger.Error("获取额度购买记录失败", zap.Error(err))
+		h.response.BadRequest(c, err.Error())
+		return
+	}
+	h.response.Success(c, res, "获取成功")
+}
+
+// ListChildQuotaAccounts 下属额度账户
+func (h *SubordinateHandler) ListChildQuotaAccounts(c *gin.Context) {
+	parentID := c.GetString("user_id")
+	if parentID == "" {
+		h.response.Unauthorized(c, "未登录")
+		return
+	}
+	childID := c.Query("child_user_id")
+	if childID == "" {
+		h.response.BadRequest(c, "child_user_id 不能为空")
+		return
+	}
+	res, err := h.app.ListChildQuotaAccounts(c.Request.Context(), &commands.ListChildQuotaAccountsCommand{
+		ParentUserID: parentID,
+		ChildUserID:  childID,
+	})
+	if err != nil {
+		h.logger.Error("获取下属额度账户失败", zap.Error(err))
+		h.response.BadRequest(c, err.Error())
+		return
+	}
+	h.response.Success(c, res, "获取成功")
+}
+
+// ListMyQuotaAccounts 当前登录用户额度账户
+func (h *SubordinateHandler) ListMyQuotaAccounts(c *gin.Context) {
+	userID := c.GetString("user_id")
+	if userID == "" {
+		h.response.Unauthorized(c, "未登录")
+		return
+	}
+	res, err := h.app.ListMyQuotaAccounts(c.Request.Context(), userID)
+	if err != nil {
+		h.logger.Error("获取我的额度账户失败", zap.Error(err))
+		h.response.BadRequest(c, err.Error())
+		return
+	}
+	h.response.Success(c, res, "获取成功")
+}

internal/infrastructure/http/routes/subordinate_routes.go

@@ -40,6 +40,10 @@ func (r *SubordinateRoutes) Register(router *sharedhttp.GinRouter) {
 		sub.POST("/assign-subscription", r.handler.AssignSubscription)
 		sub.GET("/child-subscriptions", r.handler.ListChildSubscriptions)
 		sub.DELETE("/child-subscriptions/:subscription_id", r.handler.RemoveChildSubscription)
+		sub.POST("/purchase-quota", r.handler.PurchaseQuota)
+		sub.GET("/quota-purchases", r.handler.ListQuotaPurchases)
+		sub.GET("/child-quotas", r.handler.ListChildQuotaAccounts)
+		sub.GET("/my-quotas", r.handler.ListMyQuotaAccounts)
 	}
 
 	r.logger.Info("下属账号路由注册完成")