优化客服群聊订单信息展示

backend/internal/modules/chat/conversation.go

@@ -54,6 +54,7 @@ func (r *Repository) FindConversation(ctx context.Context, principal Principal,
 		dto := ConversationDTO{
 			ID:                 conversation.ID,
 			OrderID:            conversation.OrderID,
+			ListingID:          conversation.ListingID,
 			Type:               conversation.Type,
 			Title:              conversation.Title,
 			Status:             conversation.Status,

backend/internal/modules/chat/dto.go

@@ -10,6 +10,7 @@ type Principal struct {
 type ConversationDTO struct {
 	ID                 uint64           `json:"id"`
 	OrderID            *uint64          `json:"order_id"`
+	ListingID          *uint64          `json:"listing_id"`
 	Type               string           `json:"type"`
 	Title              string           `json:"title"`
 	Status             string           `json:"status"`

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,

backend/internal/modules/chat/support.go

@@ -141,6 +141,7 @@ func (r *Repository) ListConversationsWithFilter(ctx context.Context, principal
 			items = append(items, ConversationDTO{
 				ID:                 conv.ID,
 				OrderID:            conv.OrderID,
+				ListingID:          conv.ListingID,
 				Type:               conv.Type,
 				Title:              conv.Title,
 				Status:             conv.Status,

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

backend/internal/router/router.go

@@ -489,6 +489,7 @@ func New(cfg config.Config, deps Dependencies, logger *zap.Logger) *gin.Engine {
 			adminRoutes.POST("/users/:id/deposit-free-quota", requirePerm("user:deposit_free"), adminUserHandler.SetDepositFreeQuota)
 			adminRoutes.POST("/users/:id/revoke-realname", requirePerm("user:revoke_realname"), adminUserHandler.RevokeRealname)
 			adminRoutes.GET("/orders", requirePerm("order:view"), orderHandler.AdminList)
+			adminRoutes.GET("/listing-orders/:id/latest", requirePerm("order:view"), orderHandler.AdminLatestByListing)
 			adminRoutes.GET("/orders/:id", requirePerm("order:view"), orderHandler.AdminDetail)
 			adminRoutes.GET("/orders/:id/handoff-records", requirePerm("order:view"), orderHandler.AdminHandoffRecords)
 			adminRoutes.POST("/orders/:id/close", requirePerm("order:close"), orderHandler.AdminClose)