优化客服群聊订单信息展示

backend/internal/modules/chat/participant.go

@@ -14,6 +14,7 @@ import (
 type conversationRow struct {
 	ID                 uint64
 	OrderID            *uint64
+	ListingID          *uint64
 	Type               string
 	Title              string
 	Status             string
@@ -28,7 +29,7 @@ type conversationRow struct {
 
 func (r *Repository) conversationQuery(ctx context.Context, principal Principal) *gorm.DB {
 	return r.db.WithContext(ctx).Table("chat_conversations AS c").
-		Select(`c.id, c.order_id, c.type, c.title, c.status, c.last_message_id,
+		Select(`c.id, c.order_id, c.listing_id, c.type, c.title, c.status, c.last_message_id,
 			c.last_message_preview, c.last_message_at, c.created_at, c.updated_at, cp.role,
 			(
 				SELECT COUNT(1)
@@ -282,6 +283,7 @@ func (row conversationRow) toDTO(participants []ParticipantDTO) ConversationDTO
 	return ConversationDTO{
 		ID:                 row.ID,
 		OrderID:            row.OrderID,
+		ListingID:          row.ListingID,
 		Type:               row.Type,
 		Title:              row.Title,
 		Status:             row.Status,