优化后台高频查询性能

backend/internal/modules/listing/query.go

@@ -98,9 +98,9 @@ func (r *Repository) applyAdminListFilters(db *gorm.DB, query AdminListQuery) *g
 		like := "%" + keyword + "%"
 		if id, err := strconv.ParseUint(keyword, 10, 64); err == nil {
 			db = db.Where(
-				`(l.listing_no LIKE ? OR EXISTS (SELECT 1 FROM rental_orders AS o WHERE o.listing_id = l.id AND o.order_no LIKE ?) OR l.id = ? OR l.account_id = ? OR l.owner_id = ?)`,
-				like,
-				like,
+				`(l.listing_no = ? OR EXISTS (SELECT 1 FROM rental_orders AS o WHERE o.listing_id = l.id AND o.order_no = ?) OR l.id = ? OR l.account_id = ? OR l.owner_id = ?)`,
+				keyword,
+				keyword,
 				id,
 				id,
 				id,
@@ -204,22 +204,21 @@ func (r *Repository) findDTO(ctx context.Context, where string, args ...any) (*L
 }
 
 func (r *Repository) baseQuery(ctx context.Context) *gorm.DB {
-	uploadSource := r.db.WithContext(ctx).Table("listing_uploads").
-		Select("listing_id, MAX(id) AS upload_id, MAX(NULLIF(source_channel, '')) AS source_channel").
-		Where("listing_id IS NOT NULL").
-		Group("listing_id")
 	return r.db.WithContext(ctx).Table("rental_listings AS l").
 		Select(`l.*, a.title, a.description, a.game_name, a.server_region, a.login_platform, a.rank_level,
 			a.haf_coin_amount, a.asset_summary, a.screenshot_urls, COALESCE(u.phone, '') AS owner_phone, COALESCE(u.nickname, '') AS owner_nickname,
-			CASE WHEN lu.upload_id IS NULL THEN 0 ELSE 1 END AS is_external_upload,
+			CASE WHEN lu.id IS NULL THEN 0 ELSE 1 END AS is_external_upload,
 			CASE
-				WHEN lu.upload_id IS NULL THEN ?
+				WHEN lu.id IS NULL THEN ?
 				WHEN COALESCE(lu.source_channel, '') = '' THEN ?
 				ELSE lu.source_channel
 			END AS source_channel`, sourceChannelWebsite, sourceChannelExternalUnknown).
 		Joins("JOIN game_accounts AS a ON a.id = l.account_id").
 		Joins("LEFT JOIN users AS u ON u.id = l.owner_id").
-		Joins("LEFT JOIN (?) AS lu ON lu.listing_id = l.id", uploadSource)
+		// 逐商品按 listing_id 索引定位最后一次导入，避免每次列表查询都对全量导入记录分组。
+		Joins(`LEFT JOIN listing_uploads AS lu ON lu.id = (
+			SELECT MAX(lu_latest.id) FROM listing_uploads AS lu_latest WHERE lu_latest.listing_id = l.id
+		)`)
 }
 
 func (r *Repository) findForReviewUpdate(tx *gorm.DB, listingID uint64) (*model.RentalListing, *model.GameAccount, error) {