feat: 归档佣金计算触发和快照变更，同步规范文档

- 归档 OpenSpec 变更到 archive 目录
- 创建 2 个新的主规范文件：commission-trigger 和 order-commission-snapshot
- 实现订单佣金快照字段和支付自动触发
- 确保事务一致性，所有佣金操作在同一事务内完成
- 提取成本价计算为公共工具函数

internal/service/order/service.go

@@ -12,6 +12,10 @@ import (
 	"github.com/break/junhong_cmp_fiber/pkg/constants"
 	"github.com/break/junhong_cmp_fiber/pkg/errors"
 	"github.com/break/junhong_cmp_fiber/pkg/middleware"
+	"github.com/break/junhong_cmp_fiber/pkg/queue"
+	"github.com/break/junhong_cmp_fiber/pkg/utils"
+	"github.com/bytedance/sonic"
+	"go.uber.org/zap"
 	"gorm.io/gorm"
 )
 
@@ -22,6 +26,8 @@ type Service struct {
 	walletStore               *postgres.WalletStore
 	purchaseValidationService *purchase_validation.Service
 	allocationConfigStore     *postgres.ShopSeriesAllocationConfigStore
+	queueClient               *queue.Client
+	logger                    *zap.Logger
 }
 
 func New(
@@ -31,6 +37,8 @@ func New(
 	walletStore *postgres.WalletStore,
 	purchaseValidationService *purchase_validation.Service,
 	allocationConfigStore *postgres.ShopSeriesAllocationConfigStore,
+	queueClient *queue.Client,
+	logger *zap.Logger,
 ) *Service {
 	return &Service{
 		db:                        db,
@@ -39,6 +47,8 @@ func New(
 		walletStore:               walletStore,
 		purchaseValidationService: purchaseValidationService,
 		allocationConfigStore:     allocationConfigStore,
+		queueClient:               queueClient,
+		logger:                    logger,
 	}
 }
 
@@ -67,6 +77,16 @@ func (s *Service) Create(ctx context.Context, req *dto.CreateOrderRequest, buyer
 	userID := middleware.GetUserIDFromContext(ctx)
 	configVersion := s.snapshotCommissionConfig(ctx, validationResult.Allocation.ID)
 
+	var seriesID *uint
+	var sellerShopID *uint
+	var sellerCostPrice int64
+
+	if validationResult.Allocation != nil {
+		seriesID = &validationResult.Allocation.SeriesID
+		sellerShopID = &validationResult.Allocation.ShopID
+		sellerCostPrice = utils.CalculateCostPrice(validationResult.Allocation, validationResult.TotalPrice)
+	}
+
 	order := &model.Order{
 		BaseModel: model.BaseModel{
 			Creator: userID,
@@ -82,6 +102,9 @@ func (s *Service) Create(ctx context.Context, req *dto.CreateOrderRequest, buyer
 		PaymentStatus:           model.PaymentStatusPending,
 		CommissionStatus:        model.CommissionStatusPending,
 		CommissionConfigVersion: configVersion,
+		SeriesID:                seriesID,
+		SellerShopID:            sellerShopID,
+		SellerCostPrice:         sellerCostPrice,
 	}
 
 	var items []*model.OrderItem
@@ -264,7 +287,7 @@ func (s *Service) WalletPay(ctx context.Context, orderID uint, buyerType string,
 	}
 
 	now := time.Now()
-	return s.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+	err = s.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
 		result := tx.Model(&model.Wallet{}).
 			Where("id = ? AND balance >= ? AND version = ?", wallet.ID, order.TotalAmount, wallet.Version).
 			Updates(map[string]any{
@@ -288,6 +311,13 @@ func (s *Service) WalletPay(ctx context.Context, orderID uint, buyerType string,
 
 		return s.activatePackage(ctx, tx, order)
 	})
+
+	if err != nil {
+		return err
+	}
+
+	s.enqueueCommissionCalculation(ctx, orderID)
+	return nil
 }
 
 func (s *Service) HandlePaymentCallback(ctx context.Context, orderNo string, paymentMethod string) error {
@@ -308,7 +338,7 @@ func (s *Service) HandlePaymentCallback(ctx context.Context, orderNo string, pay
 	}
 
 	now := time.Now()
-	return s.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+	err = s.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
 		if err := tx.Model(&model.Order{}).Where("id = ?", order.ID).Updates(map[string]any{
 			"payment_status": model.PaymentStatusPaid,
 			"payment_method": paymentMethod,
@@ -319,6 +349,13 @@ func (s *Service) HandlePaymentCallback(ctx context.Context, orderNo string, pay
 
 		return s.activatePackage(ctx, tx, order)
 	})
+
+	if err != nil {
+		return err
+	}
+
+	s.enqueueCommissionCalculation(ctx, order.ID)
+	return nil
 }
 
 func (s *Service) activatePackage(ctx context.Context, tx *gorm.DB, order *model.Order) error {
@@ -373,6 +410,37 @@ func (s *Service) snapshotCommissionConfig(ctx context.Context, allocationID uin
 	return config.Version
 }
 
+func (s *Service) enqueueCommissionCalculation(ctx context.Context, orderID uint) {
+	if s.queueClient == nil {
+		s.logger.Warn("队列客户端未初始化，跳过佣金计算任务入队", zap.Uint("order_id", orderID))
+		return
+	}
+
+	payload := map[string]interface{}{
+		"order_id": orderID,
+	}
+
+	payloadBytes, err := sonic.Marshal(payload)
+	if err != nil {
+		s.logger.Error("佣金计算任务载荷序列化失败",
+			zap.Uint("order_id", orderID),
+			zap.Error(err))
+		return
+	}
+
+	if err := s.queueClient.EnqueueTask(ctx, constants.TaskTypeCommission, payloadBytes); err != nil {
+		s.logger.Error("佣金计算任务入队失败",
+			zap.Uint("order_id", orderID),
+			zap.Error(err),
+			zap.String("task_type", constants.TaskTypeCommission))
+		return
+	}
+
+	s.logger.Info("佣金计算任务已入队",
+		zap.Uint("order_id", orderID),
+		zap.String("task_type", constants.TaskTypeCommission))
+}
+
 func (s *Service) buildOrderResponse(order *model.Order, items []*model.OrderItem) *dto.OrderResponse {
 	var itemResponses []*dto.OrderItemResponse
 	for _, item := range items {