优化客服群聊订单信息展示

backend/internal/modules/order/handler_admin.go

@@ -32,6 +32,19 @@ func (h *Handler) AdminDetail(c *gin.Context) {
 	response.OK(c, item)
 }
 
+func (h *Handler) AdminLatestByListing(c *gin.Context) {
+	id, ok := parseID(c)
+	if !ok {
+		return
+	}
+	item, err := h.service.FindLatestAdminByListing(c.Request.Context(), id)
+	if err != nil {
+		writeOrderError(c, err)
+		return
+	}
+	response.OK(c, item)
+}
+
 func (h *Handler) AdminHandoffRecords(c *gin.Context) {
 	id, ok := parseID(c)
 	if !ok {

backend/internal/modules/order/queries.go

@@ -80,6 +80,22 @@ func (r *Repository) FindAdmin(ctx context.Context, orderID uint64) (*OrderDTO,
 	return &dto, nil
 }
 
+func (r *Repository) FindLatestAdminByListing(ctx context.Context, listingID uint64) (*OrderDTO, error) {
+	var row orderRow
+	db := r.db.WithContext(ctx)
+	if err := r.adminQuery(ctx).
+		Where("o.listing_id = ?", listingID).
+		Order("o.id DESC").
+		First(&row).Error; err != nil {
+		return nil, err
+	}
+	dto := row.toAdminDTO()
+	applyPaymentDeadline(&dto, row.RentalOrder, pendingPaymentTimeoutMinutes(db))
+	dto.ActiveDispute = r.activeDisputeDTO(ctx, row.ID)
+	dto.Checkout = r.latestCheckoutAdminDTO(ctx, row.ID)
+	return &dto, nil
+}
+
 func (r *Repository) FindForUser(ctx context.Context, userID uint64, orderID uint64) (*OrderDTO, error) {
 	var row orderRow
 	db := r.db.WithContext(ctx)

backend/internal/modules/order/service.go

@@ -159,6 +159,16 @@ func (s *Service) FindAdmin(ctx context.Context, orderID uint64) (*OrderDTO, err
 	return s.repo.FindAdmin(ctx, orderID)
 }
 
+func (s *Service) FindLatestAdminByListing(ctx context.Context, listingID uint64) (*OrderDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	if listingID == 0 {
+		return nil, ErrListingUnavailable
+	}
+	return s.repo.FindLatestAdminByListing(ctx, listingID)
+}
+
 func (s *Service) HandoffRecordsAdmin(ctx context.Context, orderID uint64) ([]HandoffRecordDTO, error) {
 	if s.repo == nil {
 		return nil, ErrDependencyUnavailable