回调优化为单地址 upsert 配置并支持重置密钥

- 回调订阅改为单记录 upsert：保存即覆盖（URL/事件/状态），自动停用其他订阅，无新增/删除
- 新增重置密钥：保存时传 rotate_secret=true 重新生成密钥并返回一次，解决密钥丢失无法找回
- 删除不再使用的 PATCH /callbacks/:id/status 路由及对应 handler/service 死代码
- 前端回调页改为内联表单（URL/事件/状态），新增重置密钥按钮（确认后展示新密钥一次）
- 补充单地址复用、disabled 不投递、密钥轮换测试

backend/internal/handler/merchant.go

@@ -313,30 +313,34 @@ func (h *MerchantHandler) DeleteAPIClient(c *gin.Context) {
 }
 
 func (h *MerchantHandler) ListCallbacks(c *gin.Context) {
-	list, err := h.callbackSvc.ListSubscriptions(middleware.GetMerchantID(c))
+	subscription, err := h.callbackSvc.GetSubscription(middleware.GetMerchantID(c))
 	if err != nil {
 		response.ServerError(c, err.Error())
 		return
 	}
-	response.OK(c, list)
+	response.OK(c, subscription)
 }
 
 type callbackReq struct {
-	Name   string `json:"name" binding:"required"`
-	URL    string `json:"url" binding:"required"`
-	Events string `json:"events" binding:"required"`
+	Name        string `json:"name"`
+	URL         string `json:"url" binding:"required"`
+	Events      string `json:"events" binding:"required"`
+	Status      string `json:"status"`
+	RotateSecret bool   `json:"rotate_secret"`
 }
 
 func (h *MerchantHandler) CreateCallback(c *gin.Context) {
 	var req callbackReq
 	if err := c.ShouldBindJSON(&req); err != nil {
-		response.BadRequest(c, "参数错误：name、url、events 必填")
+		response.BadRequest(c, "参数错误：url、events 必填")
 		return
 	}
 	credential, err := h.callbackSvc.CreateSubscription(middleware.GetMerchantID(c), service.CreateCallbackInput{
-		Name:   req.Name,
-		URL:    req.URL,
-		Events: req.Events,
+		Name:        req.Name,
+		URL:         req.URL,
+		Events:      req.Events,
+		Status:      req.Status,
+		RotateSecret: req.RotateSecret,
 	}, middleware.GetUserID(c))
 	if err != nil {
 		response.BadRequest(c, err.Error())
@@ -345,20 +349,6 @@ func (h *MerchantHandler) CreateCallback(c *gin.Context) {
 	response.OK(c, credential)
 }
 
-func (h *MerchantHandler) UpdateCallbackStatus(c *gin.Context) {
-	var req statusReq
-	if err := c.ShouldBindJSON(&req); err != nil {
-		response.BadRequest(c, "参数错误")
-		return
-	}
-	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
-	if err := h.callbackSvc.UpdateSubscriptionStatus(middleware.GetMerchantID(c), uint(id), req.Status, middleware.GetUserID(c)); err != nil {
-		response.BadRequest(c, err.Error())
-		return
-	}
-	response.OK(c, nil)
-}
-
 func (h *MerchantHandler) ListMembers(c *gin.Context) {
 	members, err := h.merchantSvc.ListMembers(middleware.GetMerchantID(c))
 	if err != nil {

backend/internal/router/router.go

@@ -119,7 +119,6 @@ func Setup(h *Handlers) *gin.Engine {
 				merchant.DELETE("/api-clients/:id", middleware.RequireMerchantFeature(h.OpenDB, model.MerchantFeatureAPI), middleware.RequireMerchantRole(model.MemberRoleOwner, model.MemberRoleOperator), h.Merchant.DeleteAPIClient)
 				merchant.GET("/callbacks", middleware.RequireMerchantFeature(h.OpenDB, model.MerchantFeatureCallbacks), middleware.RequireMerchantRole(model.MemberRoleOwner, model.MemberRoleOperator), h.Merchant.ListCallbacks)
 				merchant.POST("/callbacks", middleware.RequireMerchantFeature(h.OpenDB, model.MerchantFeatureCallbacks), middleware.RequireMerchantRole(model.MemberRoleOwner, model.MemberRoleOperator), h.Merchant.CreateCallback)
-				merchant.PATCH("/callbacks/:id/status", middleware.RequireMerchantFeature(h.OpenDB, model.MerchantFeatureCallbacks), middleware.RequireMerchantRole(model.MemberRoleOwner, model.MemberRoleOperator), h.Merchant.UpdateCallbackStatus)
 				merchant.GET("/members", middleware.RequireMerchantRole(model.MemberRoleOwner, model.MemberRoleOperator), h.Merchant.ListMembers)
 				merchant.POST("/members", middleware.RequireMerchantRole(model.MemberRoleOwner), h.Merchant.AddCurrentMerchantMember)
 			}

backend/internal/service/callback.go

@@ -21,27 +21,28 @@ import (
 
 	"github.com/google/uuid"
 	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
 )
 
 // 回调推送策略（参考微信/支付宝通知机制）：
 // 首次推送失败后按固定序列退避重试，默认共 16 次尝试，之后标记 failed 不再推送。
 // 序列与总次数均可通过环境变量覆盖（CALLBACK_RETRY_SCHEDULE / CALLBACK_MAX_ATTEMPTS）。
 var defaultCallbackRetrySchedule = []time.Duration{
-	15 * time.Second,  // 第 2 次
-	15 * time.Second,  // 第 3 次
-	30 * time.Second,  // 第 4 次
-	3 * time.Minute,   // 第 5 次
-	10 * time.Minute,  // 第 6 次
-	20 * time.Minute,  // 第 7 次
-	30 * time.Minute,  // 第 8 次
-	30 * time.Minute,  // 第 9 次
-	30 * time.Minute,  // 第 10 次
-	60 * time.Minute,  // 第 11 次
-	3 * time.Hour,     // 第 12 次
-	3 * time.Hour,     // 第 13 次
-	3 * time.Hour,     // 第 14 次
-	6 * time.Hour,     // 第 15 次
-	6 * time.Hour,     // 第 16 次
+	15 * time.Second, // 第 2 次
+	15 * time.Second, // 第 3 次
+	30 * time.Second, // 第 4 次
+	3 * time.Minute,  // 第 5 次
+	10 * time.Minute, // 第 6 次
+	20 * time.Minute, // 第 7 次
+	30 * time.Minute, // 第 8 次
+	30 * time.Minute, // 第 9 次
+	30 * time.Minute, // 第 10 次
+	60 * time.Minute, // 第 11 次
+	3 * time.Hour,    // 第 12 次
+	3 * time.Hour,    // 第 13 次
+	3 * time.Hour,    // 第 14 次
+	6 * time.Hour,    // 第 15 次
+	6 * time.Hour,    // 第 16 次
 }
 
 // CallbackConfig 回调推送策略配置。
@@ -54,10 +55,10 @@ type CallbackConfig struct {
 
 // CallbackService 以数据库 outbox 方式管理回调，进程重启不会丢失待发送事件。
 type CallbackService struct {
-	db         *gorm.DB
-	codec      *SecretCodec
-	httpClient *http.Client
-	maxAttempts int
+	db            *gorm.DB
+	codec         *SecretCodec
+	httpClient    *http.Client
+	maxAttempts   int
 	retrySchedule []time.Duration
 }
 
@@ -103,6 +104,9 @@ type CreateCallbackInput struct {
 	Name   string
 	URL    string
 	Events string
+	Status string
+	// RotateSecret 重置回调密钥：重新生成 secret（旧密钥立即失效），返回新 secret 仅此一次。
+	RotateSecret bool
 }
 
 type CallbackCredential struct {
@@ -114,7 +118,7 @@ func (s *CallbackService) CreateSubscription(merchantID uint, in CreateCallbackI
 	in.Name = strings.TrimSpace(in.Name)
 	in.URL = strings.TrimSpace(in.URL)
 	if in.Name == "" {
-		return nil, errors.New("回调名称不能为空")
+		in.Name = "默认回调"
 	}
 	if err := validateCallbackURL(in.URL); err != nil {
 		return nil, err
@@ -123,41 +127,69 @@ func (s *CallbackService) CreateSubscription(merchantID uint, in CreateCallbackI
 	if len(events) == 0 {
 		return nil, errors.New("至少订阅一个事件")
 	}
-	// 每个商户仅允许一个回调地址：存在 active 订阅时拒绝创建，先停用旧的再新建。
-	var activeCount int64
-	if err := s.db.Model(&model.CallbackSubscription{}).
-		Where("merchant_id = ? AND status = ?", merchantID, model.CallbackStatusActive).
-		Count(&activeCount).Error; err != nil {
-		return nil, err
+	if in.Status == "" {
+		in.Status = model.CallbackStatusActive
 	}
-	if activeCount > 0 {
-		return nil, errors.New("每个商户仅支持一个回调地址，请先停用当前订阅再创建")
+	if in.Status != model.CallbackStatusActive && in.Status != model.CallbackStatusDisabled {
+		return nil, errors.New("无效的回调状态")
 	}
-	secret, err := randomToken("cb_", 32)
-	if err != nil {
-		return nil, err
-	}
-	ciphertext, err := s.codec.Encrypt(secret)
-	if err != nil {
-		return nil, err
-	}
-	subscription := &model.CallbackSubscription{
-		MerchantID:       merchantID,
-		Name:             in.Name,
-		URL:              in.URL,
-		Events:           strings.Join(events, ","),
-		SecretCiphertext: ciphertext,
-		Status:           model.CallbackStatusActive,
-	}
-	err = s.db.Transaction(func(tx *gorm.DB) error {
+
+	subscription := &model.CallbackSubscription{}
+	secret := ""
+	err := s.db.Transaction(func(tx *gorm.DB) error {
 		var merchant model.Merchant
-		if err := tx.Where("id = ? AND status = ?", merchantID, model.MerchantStatusActive).First(&merchant).Error; err != nil {
+		if err := tx.Clauses(clause.Locking{Strength: "UPDATE"}).
+			Where("id = ? AND status = ?", merchantID, model.MerchantStatusActive).
+			First(&merchant).Error; err != nil {
 			return errors.New("商户不存在或已禁用")
 		}
-		if err := tx.Create(subscription).Error; err != nil {
+
+		err := tx.Where("merchant_id = ?", merchantID).Order("id DESC").First(subscription).Error
+		if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
 			return err
 		}
-		return writeAudit(tx, &merchantID, &actorUserID, nil, "callback_subscription.create", "callback_subscription", fmt.Sprint(subscription.ID), map[string]string{"url": subscription.URL})
+		action := "callback_subscription.update"
+		rotate := in.RotateSecret
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			rotate = true // 新建时必然生成新密钥
+			action = "callback_subscription.create"
+		}
+		if rotate {
+			var tokenErr error
+			secret, tokenErr = randomToken("cb_", 32)
+			if tokenErr != nil {
+				return tokenErr
+			}
+			ciphertext, encryptErr := s.codec.Encrypt(secret)
+			if encryptErr != nil {
+				return encryptErr
+			}
+			if subscription.ID == 0 {
+				*subscription = model.CallbackSubscription{
+					MerchantID:       merchantID,
+					SecretCiphertext: ciphertext,
+				}
+			} else {
+				subscription.SecretCiphertext = ciphertext
+			}
+		}
+		subscription.Name = in.Name
+		subscription.URL = in.URL
+		subscription.Events = strings.Join(events, ",")
+		subscription.Status = in.Status
+		if subscription.ID == 0 {
+			if err := tx.Create(subscription).Error; err != nil {
+				return err
+			}
+		} else if err := tx.Save(subscription).Error; err != nil {
+			return err
+		}
+		if err := tx.Model(&model.CallbackSubscription{}).
+			Where("merchant_id = ? AND id <> ? AND status = ?", merchantID, subscription.ID, model.CallbackStatusActive).
+			Update("status", model.CallbackStatusDisabled).Error; err != nil {
+			return err
+		}
+		return writeAudit(tx, &merchantID, &actorUserID, nil, action, "callback_subscription", fmt.Sprint(subscription.ID), map[string]string{"url": subscription.URL, "status": subscription.Status})
 	})
 	if err != nil {
 		return nil, err
@@ -165,65 +197,57 @@ func (s *CallbackService) CreateSubscription(merchantID uint, in CreateCallbackI
 	return &CallbackCredential{Subscription: subscription, Secret: secret}, nil
 }
 
-func (s *CallbackService) ListSubscriptions(merchantID uint) ([]model.CallbackSubscription, error) {
-	var subscriptions []model.CallbackSubscription
-	err := s.db.Where("merchant_id = ?", merchantID).Order("id DESC").Find(&subscriptions).Error
-	return subscriptions, err
-}
-
-func (s *CallbackService) UpdateSubscriptionStatus(merchantID, id uint, status string, actorUserID uint) error {
-	if status != model.CallbackStatusActive && status != model.CallbackStatusDisabled {
-		return errors.New("无效的回调状态")
+func (s *CallbackService) GetSubscription(merchantID uint) (*model.CallbackSubscription, error) {
+	var subscription model.CallbackSubscription
+	err := s.db.Where("merchant_id = ?", merchantID).Order("id DESC").First(&subscription).Error
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return nil, nil
 	}
-	return s.db.Transaction(func(tx *gorm.DB) error {
-		result := tx.Model(&model.CallbackSubscription{}).
-			Where("id = ? AND merchant_id = ?", id, merchantID).
-			Update("status", status)
-		if result.Error != nil {
-			return result.Error
-		}
-		if result.RowsAffected == 0 {
-			return errors.New("回调订阅不存在")
-		}
-		return writeAudit(tx, &merchantID, &actorUserID, nil, "callback_subscription.status.update", "callback_subscription", fmt.Sprint(id), map[string]string{"status": status})
-	})
+	if err != nil {
+		return nil, err
+	}
+	return &subscription, nil
 }
 
 // Enqueue 在调用方事务中写入回调 outbox，只有订单事务成功才会发送事件。
 func (s *CallbackService) Enqueue(tx *gorm.DB, merchantID uint, event string, data interface{}) error {
-	var subscriptions []model.CallbackSubscription
-	if err := tx.Where("merchant_id = ? AND status = ?", merchantID, model.CallbackStatusActive).Find(&subscriptions).Error; err != nil {
+	var subscription model.CallbackSubscription
+	err := tx.Where("merchant_id = ?", merchantID).
+		Order("id DESC").
+		First(&subscription).Error
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return nil
+	}
+	if err != nil {
 		return err
 	}
-	now := time.Now()
-	for _, subscription := range subscriptions {
-		if !subscribesTo(subscription.Events, event) {
-			continue
-		}
-		eventID := uuid.NewString()
-		payload, err := json.Marshal(map[string]interface{}{
-			"event_id":    eventID,
-			"event":       event,
-			"occurred_at": timeutil.FormatAPITime(now),
-			"data":        data,
-		})
-		if err != nil {
-			return err
-		}
-		delivery := model.CallbackDelivery{
-			MerchantID:             merchantID,
-			CallbackSubscriptionID: subscription.ID,
-			EventID:                eventID,
-			Event:                  event,
-			Payload:                string(payload),
-			Status:                 model.CallbackDeliveryPending,
-			NextAttemptAt:          now,
-		}
-		if err := tx.Create(&delivery).Error; err != nil {
-			return err
-		}
+	if subscription.Status != model.CallbackStatusActive {
+		return nil
 	}
-	return nil
+	if !subscribesTo(subscription.Events, event) {
+		return nil
+	}
+	now := time.Now()
+	eventID := uuid.NewString()
+	payload, err := json.Marshal(map[string]interface{}{
+		"event_id":    eventID,
+		"event":       event,
+		"occurred_at": timeutil.FormatAPITime(now),
+		"data":        data,
+	})
+	if err != nil {
+		return err
+	}
+	delivery := model.CallbackDelivery{
+		MerchantID:             merchantID,
+		CallbackSubscriptionID: subscription.ID,
+		EventID:                eventID,
+		Event:                  event,
+		Payload:                string(payload),
+		Status:                 model.CallbackDeliveryPending,
+		NextAttemptAt:          now,
+	}
+	return tx.Create(&delivery).Error
 }
 
 // DispatchDue 执行一批可发送的 outbox 记录。返回成功/失败尝试数，便于日志监控。

backend/internal/service/callback_test.go

@@ -0,0 +1,145 @@
+package service
+
+import (
+	"testing"
+
+	"affiliate_dash/internal/model"
+
+	"gorm.io/gorm"
+)
+
+func TestCallbackSubscriptionSaveReusesSingleConfigAndControlsDelivery(t *testing.T) {
+	db := newServiceTestDB(t)
+	merchantID, _ := seedFulfillmentMerchant(t, db, "callback-single-config", 1000, 1, 100)
+	codec, err := NewSecretCodec("test-master-key")
+	if err != nil {
+		t.Fatalf("codec: %v", err)
+	}
+	svc := NewCallbackService(db, codec)
+
+	first, err := svc.CreateSubscription(merchantID, CreateCallbackInput{
+		URL:    "https://example.com/old-callback",
+		Events: "order.shipping.updated",
+		Status: model.CallbackStatusActive,
+	}, 7)
+	if err != nil {
+		t.Fatalf("create callback: %v", err)
+	}
+	if first.Secret == "" {
+		t.Fatalf("new callback should return secret once")
+	}
+
+	second, err := svc.CreateSubscription(merchantID, CreateCallbackInput{
+		URL:    "https://example.com/new-callback",
+		Events: "order.shipping.updated",
+		Status: model.CallbackStatusDisabled,
+	}, 7)
+	if err != nil {
+		t.Fatalf("update callback: %v", err)
+	}
+	if second.Subscription.ID != first.Subscription.ID {
+		t.Fatalf("callback should reuse one row, first=%d second=%d", first.Subscription.ID, second.Subscription.ID)
+	}
+	if second.Secret != "" {
+		t.Fatalf("updated callback should not rotate or reveal secret")
+	}
+
+	var subscriptionCount int64
+	if err := db.Model(&model.CallbackSubscription{}).Where("merchant_id = ?", merchantID).Count(&subscriptionCount).Error; err != nil {
+		t.Fatalf("count subscriptions: %v", err)
+	}
+	if subscriptionCount != 1 {
+		t.Fatalf("expected one callback subscription, got %d", subscriptionCount)
+	}
+
+	if err := db.Transaction(func(tx *gorm.DB) error {
+		return svc.Enqueue(tx, merchantID, "order.shipping.updated", map[string]string{"source": "test"})
+	}); err != nil {
+		t.Fatalf("enqueue disabled callback: %v", err)
+	}
+	var deliveryCount int64
+	if err := db.Model(&model.CallbackDelivery{}).Where("merchant_id = ?", merchantID).Count(&deliveryCount).Error; err != nil {
+		t.Fatalf("count deliveries: %v", err)
+	}
+	if deliveryCount != 0 {
+		t.Fatalf("disabled callback should not enqueue delivery, got %d", deliveryCount)
+	}
+
+	third, err := svc.CreateSubscription(merchantID, CreateCallbackInput{
+		URL:    "https://example.com/new-callback",
+		Events: "order.shipping.updated",
+		Status: model.CallbackStatusActive,
+	}, 7)
+	if err != nil {
+		t.Fatalf("enable callback: %v", err)
+	}
+	if third.Subscription.ID != first.Subscription.ID {
+		t.Fatalf("enabled callback should still reuse one row")
+	}
+	if err := db.Transaction(func(tx *gorm.DB) error {
+		return svc.Enqueue(tx, merchantID, "order.shipping.updated", map[string]string{"source": "test"})
+	}); err != nil {
+		t.Fatalf("enqueue active callback: %v", err)
+	}
+	if err := db.Model(&model.CallbackDelivery{}).Where("merchant_id = ?", merchantID).Count(&deliveryCount).Error; err != nil {
+		t.Fatalf("count deliveries after enable: %v", err)
+	}
+	if deliveryCount != 1 {
+		t.Fatalf("active callback should enqueue one delivery, got %d", deliveryCount)
+	}
+}
+
+func TestCallbackSubscriptionRotateSecret(t *testing.T) {
+	db := newServiceTestDB(t)
+	merchantID, _ := seedFulfillmentMerchant(t, db, "callback-rotate-secret", 1000, 1, 100)
+	codec, err := NewSecretCodec("test-master-key")
+	if err != nil {
+		t.Fatalf("codec: %v", err)
+	}
+	svc := NewCallbackService(db, codec)
+
+	first, err := svc.CreateSubscription(merchantID, CreateCallbackInput{
+		URL:    "https://example.com/cb",
+		Events: "order.shipping.updated",
+		Status: model.CallbackStatusActive,
+	}, 7)
+	if err != nil {
+		t.Fatalf("create callback: %v", err)
+	}
+	if first.Secret == "" {
+		t.Fatalf("new callback should return secret")
+	}
+
+	// 普通更新不轮换密钥
+	updated, err := svc.CreateSubscription(merchantID, CreateCallbackInput{
+		URL:    "https://example.com/cb",
+		Events: "order.shipping.updated",
+		Status: model.CallbackStatusActive,
+	}, 7)
+	if err != nil {
+		t.Fatalf("update callback: %v", err)
+	}
+	if updated.Secret != "" {
+		t.Fatalf("plain update should not rotate secret")
+	}
+
+	// 显式重置密钥：返回新 secret，且与旧 secret 不同
+	rotated, err := svc.CreateSubscription(merchantID, CreateCallbackInput{
+		URL:         "https://example.com/cb",
+		Events:      "order.shipping.updated",
+		Status:      model.CallbackStatusActive,
+		RotateSecret: true,
+	}, 7)
+	if err != nil {
+		t.Fatalf("rotate callback: %v", err)
+	}
+	if rotated.Secret == "" {
+		t.Fatalf("rotate should return new secret")
+	}
+	if rotated.Secret == first.Secret {
+		t.Fatalf("rotated secret should differ from old secret")
+	}
+	if rotated.Subscription.ID != first.Subscription.ID {
+		t.Fatalf("rotate should keep same subscription row")
+	}
+}

backend/internal/service/fulfillment.go

@@ -240,9 +240,9 @@ func (s *FulfillmentService) CreateTestOrder(in CreateTestOrderInput) (*model.Fu
 		in.OrderStatus = model.OrderStatusPaid
 	}
 	switch in.OrderStatus {
-	case model.OrderStatusPaid, model.OrderStatusShipFailed:
+	case model.OrderStatusPaid, model.OrderStatusShipFailed, model.OrderStatusCancelled:
 	default:
-		return nil, errors.New("测试订单仅支持已支付待发货或发货失败状态")
+		return nil, errors.New("测试订单仅支持已支付待发货、发货失败或已取消状态")
 	}
 
 	requestData := map[string]interface{}{
@@ -301,13 +301,18 @@ func (s *FulfillmentService) CreateTestOrder(in CreateTestOrderInput) (*model.Fu
 		if in.OrderStatus == model.OrderStatusShipFailed {
 			order.FailureReason = fallbackName(in.Note, "联调测试订单初始化为发货失败，可重新发货")
 		}
+		if in.OrderStatus == model.OrderStatusCancelled {
+			now := time.Now()
+			order.CancelledAt = &now
+		}
 		if err := tx.Create(order).Error; err != nil {
 			return err
 		}
+		canShip, _ := CanFulfill(order)
 		if err := writeAudit(tx, &in.MerchantID, &in.ActorUserID, nil, "merchant_test_order.create", "fulfillment_order", order.OrderNo, map[string]interface{}{
 			"sku":          in.SKU,
 			"order_status": in.OrderStatus,
-			"can_ship":     true,
+			"can_ship":     canShip,
 		}); err != nil {
 			return err
 		}
@@ -798,15 +803,15 @@ type DashboardStats struct {
 	UserCount                 int64  `json:"user_count"`
 	OrderCount                int64  `json:"order_count"`
 	TodayOrderCount           int64  `json:"today_order_count"`
-	TotalSales                int64                 `json:"total_sales"`
-	TodaySales                int64                 `json:"today_sales"`
-	TotalFees                 int64                 `json:"total_fees"`
-	TodayFees                 int64                 `json:"today_fees"`
-	PaidOrderCount            int64                 `json:"paid_order_count"`
-	DeliveringOrderCount      int64                 `json:"delivering_order_count"`
-	DeliveredOrderCount       int64                 `json:"delivered_order_count"`
-	ShipFailedOrderCount      int64                 `json:"ship_failed_order_count"`
-	CancelledOrderCount       int64                 `json:"cancelled_order_count"`
+	TotalSales                int64  `json:"total_sales"`
+	TodaySales                int64  `json:"today_sales"`
+	TotalFees                 int64  `json:"total_fees"`
+	TodayFees                 int64  `json:"today_fees"`
+	PaidOrderCount            int64  `json:"paid_order_count"`
+	DeliveringOrderCount      int64  `json:"delivering_order_count"`
+	DeliveredOrderCount       int64  `json:"delivered_order_count"`
+	ShipFailedOrderCount      int64  `json:"ship_failed_order_count"`
+	CancelledOrderCount       int64  `json:"cancelled_order_count"`
 	WalletAvailableBalance    int64  `json:"wallet_available_balance"`
 	WalletFrozenBalance       int64  `json:"wallet_frozen_balance"`
 	APIClientCount            int64  `json:"api_client_count"`

backend/internal/service/fulfillment_test.go

@@ -559,7 +559,7 @@ func TestMarkProcessingTimeoutDistinguishesUpstreamSubmission(t *testing.T) {
 		t.Fatalf("create submitted order: %v", err)
 	}
 	if _, err := svc.UpdateFulfillment(FulfillmentUpdateInput{
-		MerchantID: merchantID,
+		MerchantID:  merchantID,
 		APIClientID: 13,
 		OrderNo:     submittedOrder.Order.OrderNo,
 		Status:      model.OrderStatusDelivering,
@@ -582,7 +582,7 @@ func TestMarkProcessingTimeoutDistinguishesUpstreamSubmission(t *testing.T) {
 		t.Fatalf("create interrupted order: %v", err)
 	}
 	if _, err := svc.UpdateFulfillment(FulfillmentUpdateInput{
-		MerchantID: merchantID,
+		MerchantID:  merchantID,
 		APIClientID: 13,
 		OrderNo:     interruptedOrder.Order.OrderNo,
 		Status:      model.OrderStatusDelivering,
@@ -805,6 +805,31 @@ func TestCreateTestOrderSupportsFailedFulfillableStatus(t *testing.T) {
 	}
 }
 
+func TestCreateTestOrderSupportsCancelledUnfulfillableStatus(t *testing.T) {
+	db := newServiceTestDB(t)
+	merchantID, product := seedFulfillmentMerchant(t, db, "merchant-test-cancelled", 0, -1, 100)
+	svc := NewFulfillmentService(db, nil)
+
+	order, err := svc.CreateTestOrder(CreateTestOrderInput{
+		MerchantID:  merchantID,
+		SKU:         product.SKU,
+		OrderStatus: model.OrderStatusCancelled,
+	})
+	if err != nil {
+		t.Fatalf("create cancelled test order: %v", err)
+	}
+	if order.OrderStatus != model.OrderStatusCancelled || order.CancelledAt == nil {
+		t.Fatalf("unexpected cancelled test order: %+v", order)
+	}
+	openOrder, err := svc.QueryOpenOrder(order.OrderNo)
+	if err != nil {
+		t.Fatalf("query open cancelled order: %v", err)
+	}
+	if openOrder.CanShip || openOrder.Status != "cancelled" || !strings.Contains(openOrder.CannotShipReason, "已取消") {
+		t.Fatalf("cancelled test order should be unfulfillable, got %+v", openOrder)
+	}
+}
+
 func TestHandleShipNotifyUpdatesOrderAndEnqueuesMerchantCallback(t *testing.T) {
 	db := newServiceTestDB(t)
 	merchantID, product := seedFulfillmentMerchant(t, db, "merchant-source-notify", 1000, 2, 100)

frontend/src/api/index.ts

@@ -67,7 +67,7 @@ export const merchantApi = {
     sku: string
     buyer_reference?: string
     note?: string
-    order_status?: 'paid' | 'ship_failed'
+    order_status?: 'paid' | 'ship_failed' | 'cancelled'
   }) => request.post('/merchant/orders/test', data).then((r) => r.data.data as CreateTestOrderResult),
   getDeliveryLink: (orderNo: string) =>
     request.get(`/merchant/orders/${encodeURIComponent(orderNo)}/delivery-link`).then((r) => r.data.data as DeliveryLinkResult),
@@ -94,11 +94,9 @@ export const merchantApi = {
   deleteApiClient: (id: number) =>
     request.delete(`/merchant/api-clients/${id}`).then((r) => r.data.data),
   callbacks: () =>
-    request.get('/merchant/callbacks').then((r) => r.data.data as CallbackSubscription[]),
-  createCallback: (data: { name: string; url: string; events: string }) =>
+    request.get('/merchant/callbacks').then((r) => r.data.data as CallbackSubscription | null),
+  saveCallback: (data: { url: string; events: string; status: CallbackSubscription['status']; rotate_secret?: boolean }) =>
     request.post('/merchant/callbacks', data).then((r) => r.data.data as CallbackCredential),
-  updateCallbackStatus: (id: number, status: CallbackSubscription['status']) =>
-    request.patch(`/merchant/callbacks/${id}/status`, { status }).then((r) => r.data.data),
   members: () =>
     request.get('/merchant/members').then((r) => r.data.data as MerchantMember[]),
   addMember: (data: { user_id: number; role: MerchantMember['role']; is_default?: boolean }) =>

frontend/src/pages/MerchantCenter.tsx

@@ -77,6 +77,7 @@ const eventOptions = [
 const testOrderStatusOptions = [
   { value: 'paid', label: '已支付，可发货' },
   { value: 'ship_failed', label: '发货失败，可重试' },
+  { value: 'cancelled', label: '已取消，不可发货' },
 ]
 
 type MerchantCenterTab = 'products' | 'orders' | 'wallet' | 'api' | 'callbacks' | 'members'
@@ -97,7 +98,7 @@ export default function MerchantCenter({ fixedTab, title = '商户中心' }: Mer
   const [ledger, setLedger] = useState<PageResult<WalletLedgerEntry>>({ list: [], total: 0, page: 1, size: 10 })
   const [wallet, setWallet] = useState<WalletAccount | null>(null)
   const [apiClients, setApiClients] = useState<ApiClient[]>([])
-  const [callbacks, setCallbacks] = useState<CallbackSubscription[]>([])
+  const [callback, setCallback] = useState<CallbackSubscription | null>(null)
   const [members, setMembers] = useState<MerchantMember[]>([])
   const [loading, setLoading] = useState(false)
   const [productOpen, setProductOpen] = useState(false)
@@ -105,7 +106,6 @@ export default function MerchantCenter({ fixedTab, title = '商户中心' }: Mer
   const [walletOpen, setWalletOpen] = useState(false)
   const [apiClientOpen, setApiClientOpen] = useState(false)
   const [apiCredential, setApiCredential] = useState<ApiCredential | null>(null)
-  const [callbackOpen, setCallbackOpen] = useState(false)
   const [callbackCredential, setCallbackCredential] = useState<CallbackCredential | null>(null)
   const [memberOpen, setMemberOpen] = useState(false)
   const [testOrderOpen, setTestOrderOpen] = useState(false)
@@ -214,12 +214,18 @@ export default function MerchantCenter({ fixedTab, title = '商户中心' }: Mer
 
   const loadCallbacks = useCallback(async (role = merchantRole) => {
     if (role !== 'owner' && role !== 'operator') {
-      setCallbacks([])
+      setCallback(null)
+      callbackForm.resetFields()
       return
     }
     const callbackData = await merchantApi.callbacks()
-    setCallbacks(callbackData || [])
-  }, [merchantRole])
+    setCallback(callbackData || null)
+    callbackForm.setFieldsValue(callbackData ? {
+      url: callbackData.url,
+      events: eventsToValue(callbackData.events),
+      status: callbackData.status,
+    } : defaultCallbackFormValues())
+  }, [callbackForm, merchantRole])
 
   const loadMembers = useCallback(async (role = merchantRole) => {
     if (role !== 'owner' && role !== 'operator') {
@@ -414,17 +420,37 @@ export default function MerchantCenter({ fixedTab, title = '商户中心' }: Mer
   const submitCallback = async () => {
     const values = await callbackForm.validateFields()
     try {
-      const credential = await merchantApi.createCallback({
-        name: values.name,
+      const credential = await merchantApi.saveCallback({
         url: values.url,
         events: (values.events || []).join(','),
+        status: values.status,
       })
-      setCallbackCredential(credential)
-      setCallbackOpen(false)
-      message.success('回调已创建')
-      loadCallbacks()
+      setCallback(credential.subscription)
+      if (credential.secret) {
+        setCallbackCredential(credential)
+      }
+      message.success('回调配置已保存')
     } catch (e) {
-      message.error(e instanceof Error ? e.message : '创建失败')
+      message.error(e instanceof Error ? e.message : '保存失败')
+    }
+  }
+
+  const rotateCallbackSecret = async () => {
+    const values = await callbackForm.validateFields()
+    try {
+      const credential = await merchantApi.saveCallback({
+        url: values.url,
+        events: (values.events || []).join(','),
+        status: values.status,
+        rotate_secret: true,
+      })
+      setCallback(credential.subscription)
+      if (credential.secret) {
+        setCallbackCredential(credential)
+      }
+      message.success('回调密钥已重置，旧密钥立即失效')
+    } catch (e) {
+      message.error(e instanceof Error ? e.message : '重置失败')
     }
   }
 
@@ -464,16 +490,6 @@ export default function MerchantCenter({ fixedTab, title = '商户中心' }: Mer
     }
   }
 
-  const toggleCallback = async (record: CallbackSubscription) => {
-    try {
-      await merchantApi.updateCallbackStatus(record.id, record.status === 'active' ? 'disabled' : 'active')
-      message.success('状态已更新')
-      loadCallbacks()
-    } catch (e) {
-      message.error(e instanceof Error ? e.message : '更新失败')
-    }
-  }
-
   const productColumns: ColumnsType<MerchantProduct> = [
     { title: 'SKU', dataIndex: 'sku', width: 200, ellipsis: true, render: (v) => <Typography.Text code copyable={{ tooltips: false }} style={{ maxWidth: '100%' }} ellipsis>{v}</Typography.Text> },
     { title: '名称', dataIndex: 'display_name', width: 200, ellipsis: true, render: (_, r) => r.display_name || r.product?.name || '-' },
@@ -579,24 +595,6 @@ export default function MerchantCenter({ fixedTab, title = '商户中心' }: Mer
     },
   ]
 
-  const callbackColumns: ColumnsType<CallbackSubscription> = [
-    { title: '名称', dataIndex: 'name', width: 180, ellipsis: true },
-    { title: 'URL', dataIndex: 'url', ellipsis: true },
-    { title: '事件', dataIndex: 'events', width: 260, ellipsis: true },
-    { title: '状态', dataIndex: 'status', width: 90, render: activeStatusTag },
-    { title: '创建时间', dataIndex: 'created_at', width: 180, render: formatDateTime },
-    {
-      title: '操作',
-      key: 'action',
-      width: 90,
-      render: (_, record) => canManage ? (
-        <Button type="link" size="small" onClick={() => toggleCallback(record)}>
-          {record.status === 'active' ? '禁用' : '启用'}
-        </Button>
-      ) : '-',
-    },
-  ]
-
   const memberColumns: ColumnsType<MerchantMember> = [
     { title: '用户', dataIndex: ['user', 'username'], render: (_, r) => r.user?.username || `#${r.user_id}` },
     { title: '昵称', dataIndex: ['user', 'nickname'], render: (_, r) => r.user?.nickname || '-' },
@@ -729,17 +727,47 @@ export default function MerchantCenter({ fixedTab, title = '商户中心' }: Mer
 
   const callbackContent = (
     <Space direction="vertical" style={{ width: '100%' }} size="middle">
-      <Space style={{ width: '100%', justifyContent: 'space-between' }}>
-        <Typography.Text type="secondary">
-          回调事件通过 outbox 持久化推送，失败按固定间隔退避重试（最多 16 次）后标记失败。每个商户仅支持一个回调地址，变更地址请先停用当前订阅。
-        </Typography.Text>
-        {canManage && <Button type="primary" icon={<PlusOutlined />} onClick={() => {
-          callbackForm.resetFields()
-          callbackForm.setFieldsValue({ events: ['order.shipping.updated'] })
-          setCallbackOpen(true)
-        }}>新增回调</Button>}
-      </Space>
-      <Table rowKey="id" loading={loading} columns={callbackColumns} dataSource={callbacks} tableLayout="fixed" />
+      <Typography.Text type="secondary">
+        回调事件通过 outbox 持久化推送，失败按固定间隔退避重试（最多 16 次）后标记失败。每个商户只保留一份回调配置。
+      </Typography.Text>
+      <Card size="small" loading={loading}>
+        <Form
+          form={callbackForm}
+          layout="vertical"
+          disabled={!canManage}
+          onFinish={submitCallback}
+          initialValues={defaultCallbackFormValues()}
+        >
+          <Form.Item name="url" label="回调 URL" rules={[{ required: true, message: '请填写回调 URL' }]}>
+            <Input placeholder="https://example.com/callback" />
+          </Form.Item>
+          <Form.Item name="events" label="事件" rules={[{ required: true, message: '请选择回调事件' }]}>
+            <Select mode="multiple" options={eventOptions} />
+          </Form.Item>
+          <Form.Item name="status" label="状态" rules={[{ required: true }]}>
+            <Select options={[{ value: 'active', label: '启用' }, { value: 'disabled', label: '禁用' }]} />
+          </Form.Item>
+          <Space style={{ width: '100%', justifyContent: 'space-between' }}>
+            <Typography.Text type="secondary">
+              {callback?.updated_at ? `上次保存：${formatDateTime(callback.updated_at)}` : '尚未保存回调配置'}
+            </Typography.Text>
+            <Space>
+              {canManage && (
+                <Popconfirm
+                  title="重置回调密钥？"
+                  description="重置后旧密钥立即失效，平台将用新密钥签名推送，新密钥仅展示一次。"
+                  okText="重置"
+                  okButtonProps={{ danger: true }}
+                  onConfirm={rotateCallbackSecret}
+                >
+                  <Button>重置密钥</Button>
+                </Popconfirm>
+              )}
+              {canManage && <Button type="primary" htmlType="submit">保存配置</Button>}
+            </Space>
+          </Space>
+        </Form>
+      </Card>
     </Space>
   )
 
@@ -904,6 +932,11 @@ export default function MerchantCenter({ fixedTab, title = '商户中心' }: Mer
                 {testOrderResult.can_ship ? 'can_ship=true' : 'can_ship=false'}
               </Tag>
             </Descriptions.Item>
+            {!testOrderResult.can_ship && (
+              <Descriptions.Item label="不可发货原因">
+                <Typography.Text type="secondary">{testOrderResult.cannot_ship_reason || '-'}</Typography.Text>
+              </Descriptions.Item>
+            )}
             <Descriptions.Item label="链接有效期">
               {testOrderResult.order.delivery_link_revoked_at ? <Tag color="red">已作废</Tag> : formatDateTime(testOrderResult.order.delivery_link_expires_at)}
             </Descriptions.Item>
@@ -953,20 +986,6 @@ export default function MerchantCenter({ fixedTab, title = '商户中心' }: Mer
         {apiCredential && <SecretBlock appKey={apiCredential.client.app_key} secret={apiCredential.secret} />}
       </Modal>
 
-      <Modal title="新增回调" open={callbackOpen} onOk={submitCallback} onCancel={() => setCallbackOpen(false)} destroyOnClose>
-        <Form form={callbackForm} layout="vertical" style={{ marginTop: 16 }}>
-          <Form.Item name="name" label="名称" rules={[{ required: true }]}>
-            <Input />
-          </Form.Item>
-          <Form.Item name="url" label="回调 URL" rules={[{ required: true }]}>
-            <Input placeholder="https://example.com/callback" />
-          </Form.Item>
-          <Form.Item name="events" label="事件" rules={[{ required: true }]}>
-            <Select mode="multiple" options={eventOptions} />
-          </Form.Item>
-        </Form>
-      </Modal>
-
       <Modal title="回调密钥" open={!!callbackCredential} onCancel={() => setCallbackCredential(null)} footer={<Button type="primary" onClick={() => setCallbackCredential(null)}>我已保存</Button>}>
         {callbackCredential && <SecretBlock secret={callbackCredential.secret} />}
       </Modal>
@@ -1030,6 +1049,20 @@ function featuresToList(features?: string) {
   return list.length > 0 ? list : ['products', 'orders', 'wallet', 'api', 'callbacks']
 }
 
+function defaultCallbackFormValues() {
+  return {
+    events: ['order.shipping.updated'],
+    status: 'active',
+  }
+}
+
+function eventsToValue(events?: string) {
+  return (events || '')
+    .split(',')
+    .map((item) => item.trim())
+    .filter(Boolean)
+}
+
 function tabFromSearch(search: string): MerchantCenterTab | null {
   const tab = new URLSearchParams(search).get('tab')
   const allowedTabs: MerchantCenterTab[] = ['products', 'orders', 'wallet', 'api', 'callbacks', 'members']

frontend/src/types/index.ts

@@ -199,6 +199,7 @@ export interface CallbackSubscription {
   events: string
   status: 'active' | 'disabled'
   created_at: string
+  updated_at: string
 }
 
 export interface CallbackCredential {