refactor(distribution): 重写分销迁移并落地利润百分比分成与货架比例

将 000064-000078 合并为 064/065/066，默认规则改为收号 35%、卖出 40%、服务费 25%。
货架调价改为增加分站 1 元兑换哈夫币比例。sql-guard 仅保护 main 已发布迁移。

backend/internal/modules/listing/public_query.go

@@ -237,11 +237,11 @@ func (r *Repository) FindPublic(ctx context.Context, id uint64, siteCode string)
 		return nil, err
 	}
 	applyPublicListingURLs(dto)
-	markups, err := r.shelfMarkupByListingID(ctx, siteCode, []uint64{dto.ID})
-	if err != nil {
+	items := []ListingDTO{*dto}
+	if err := r.applyShelfMarkup(ctx, siteCode, items); err != nil {
 		return nil, err
 	}
-	dto.PriceCent += markups[dto.ID]
+	*dto = items[0]
 	return dto, nil
 }
 
@@ -253,36 +253,40 @@ func (r *Repository) applyShelfMarkup(ctx context.Context, siteCode string, item
 	for _, item := range items {
 		ids = append(ids, item.ID)
 	}
-	markups, err := r.shelfMarkupByListingID(ctx, siteCode, ids)
+	deltas, err := r.shelfRatioDeltaByListingID(ctx, siteCode, ids)
 	if err != nil {
 		return err
 	}
 	for i := range items {
-		items[i].PriceCent += markups[items[i].ID]
+		delta := deltas[items[i].ID]
+		if delta == 0 {
+			continue
+		}
+		items[i].PriceCent, _, _ = ApplyShelfRatio(items[i].HafCoinAmount, items[i].PriceCent, delta)
 	}
 	return nil
 }
 
-func (r *Repository) shelfMarkupByListingID(ctx context.Context, siteCode string, listingIDs []uint64) (map[uint64]int64, error) {
-	result := make(map[uint64]int64, len(listingIDs))
+func (r *Repository) shelfRatioDeltaByListingID(ctx context.Context, siteCode string, listingIDs []uint64) (map[uint64]float64, error) {
+	result := make(map[uint64]float64, len(listingIDs))
 	if siteCode == "" || len(listingIDs) == 0 {
 		return result, nil
 	}
-	type markupRow struct {
-		ListingID        uint64 `gorm:"column:listing_id"`
-		MarkupAmountCent int64  `gorm:"column:markup_amount_cent"`
+	type ratioRow struct {
+		ListingID       uint64  `gorm:"column:listing_id"`
+		ShelfRatioDelta float64 `gorm:"column:shelf_ratio_delta"`
 	}
-	var rows []markupRow
+	var rows []ratioRow
 	if err := r.db.WithContext(ctx).Table("distribution_site_accounts AS dsa").
-		Select("dsa.listing_id, COALESCE(dsa.markup_amount_cent, 0) AS markup_amount_cent").
+		Select("dsa.listing_id, COALESCE(dsa.shelf_ratio_delta, 0) AS shelf_ratio_delta").
 		Joins("INNER JOIN distribution_sites AS ds ON ds.id = dsa.site_id AND ds.site_code = ? AND ds.status = 'active'", siteCode).
 		Where("dsa.display_status = 'enabled' AND dsa.listing_id IN ?", listingIDs).
 		Scan(&rows).Error; err != nil {
 		return nil, err
 	}
 	for _, row := range rows {
-		if row.MarkupAmountCent > 0 {
-			result[row.ListingID] = row.MarkupAmountCent
+		if row.ShelfRatioDelta > 0 {
+			result[row.ListingID] = row.ShelfRatioDelta
 		}
 	}
 	return result, nil