feat(distribution): 支持分销上传来源追踪、主站审核展示与收售结算模式自动判定

backend/internal/modules/order/lifecycle.go

@@ -3,6 +3,8 @@ package order
 import (
 	"context"
 	"encoding/json"
+	"errors"
+	"fmt"
 	"time"
 
 	"hfb_sys/backend/internal/model"
@@ -146,13 +148,22 @@ func (r *Repository) Create(ctx context.Context, renterID uint64, req CreateRequ
 func orderAccountSourceSnapshot(tx *gorm.DB, listingID uint64) (string, string, error) {
 	var upload model.ListingUpload
 	err := tx.Where("listing_id = ?", listingID).Order("id DESC").First(&upload).Error
-	if err == gorm.ErrRecordNotFound {
-		return "internal", "", nil
+	if err == nil {
+		return "external", upload.SourceChannel, nil
 	}
-	if err != nil {
+	if !errors.Is(err, gorm.ErrRecordNotFound) {
 		return "", "", err
 	}
-	return "external", upload.SourceChannel, nil
+
+	var listing model.RentalListing
+	if err := tx.Select("distribution_site_id").First(&listing, listingID).Error; err == nil && listing.DistributionSiteID != nil {
+		var site model.DistributionSite
+		if err := tx.Select("site_code, site_name").First(&site, *listing.DistributionSiteID).Error; err == nil {
+			return "distribution", fmt.Sprintf("分销站 - %s (%s)", site.SiteName, site.SiteCode), nil
+		}
+	}
+
+	return "internal", "", nil
 }
 
 func listingHandoffMode(listing model.RentalListing) string {