分销后台前端对接与结算明细接口

- 新增 GET /admin/distribution/settlement-batches/:id/items 明细查询
- distribution-admin 重构为 react-router 多页面：仪表盘/网站/规则(启停)/订单(筛选分页)/结算(创建/明细/结算)/支付通道(绑定解绑)/账号展示(上下架)
- axios 统一 401 提示，引导回主站后台登录；金额统一整数分格式化
- npm run build(tsc 严格模式) 通过

backend/internal/modules/distribution/dto.go

@@ -178,3 +178,11 @@ type CreateFinancialSnapshotRequest struct {
 	MarkupAmountCent    int64                  `json:"markup_amount_cent"`
 	Parties             []SnapshotPartyRequest `json:"parties"`
 }
+
+type SettlementItemDTO struct {
+	ID         uint64 `json:"id"`
+	OrderID    uint64 `json:"order_id"`
+	PartyRole  string `json:"party_role"`
+	AmountCent int64  `json:"amount_cent"`
+	Status     string `json:"status"`
+}

backend/internal/modules/distribution/handler.go

@@ -322,6 +322,20 @@ func (h *Handler) CreateSettlementBatch(c *gin.Context) {
 	response.Created(c, item)
 }
 
+func (h *Handler) ListSettlementItems(c *gin.Context) {
+	id, ok := parseID(c)
+	if !ok {
+		return
+	}
+	adminID, _ := currentAdminID(c)
+	items, err := h.service.ListSettlementItems(c.Request.Context(), adminID, id)
+	if err != nil {
+		writeError(c, err)
+		return
+	}
+	response.OK(c, gin.H{"items": items})
+}
+
 func (h *Handler) MarkSettlementBatch(c *gin.Context) {
 	id, ok := parseID(c)
 	if !ok {

backend/internal/modules/distribution/repository.go

@@ -582,3 +582,33 @@ func (r *Repository) CreateFinancialSnapshot(ctx context.Context, adminID, order
 	}
 	return r.FindOrder(ctx, adminID, orderID)
 }
+
+func (r *Repository) ListSettlementItems(ctx context.Context, adminID, batchID uint64) ([]SettlementItemDTO, error) {
+	var batch model.DistributionSettlementBatch
+	if err := r.db.WithContext(ctx).First(&batch, batchID).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, ErrSettlementBatchNotFound
+		}
+		return nil, err
+	}
+	if err := r.ensureSiteAccess(ctx, adminID, batch.SiteID); err != nil {
+		return nil, err
+	}
+	var rows []struct {
+		model.DistributionSettlementItem
+		PartyRole string
+	}
+	if err := r.db.WithContext(ctx).
+		Table("distribution_settlement_items i").
+		Select("i.id, i.order_id, i.amount_cent, i.status, p.party_role").
+		Joins("JOIN distribution_order_parties p ON p.id = i.party_id").
+		Where("i.batch_id = ?", batchID).
+		Order("i.id ASC").Scan(&rows).Error; err != nil {
+		return nil, err
+	}
+	items := make([]SettlementItemDTO, 0, len(rows))
+	for _, row := range rows {
+		items = append(items, SettlementItemDTO{ID: row.ID, OrderID: row.OrderID, PartyRole: row.PartyRole, AmountCent: row.AmountCent, Status: row.Status})
+	}
+	return items, nil
+}

backend/internal/modules/distribution/service.go

@@ -152,6 +152,12 @@ func (s *Service) CreateSettlementBatch(ctx context.Context, adminID uint64, req
 	}
 	return s.repo.CreateSettlementBatch(ctx, adminID, req)
 }
+func (s *Service) ListSettlementItems(ctx context.Context, adminID, batchID uint64) ([]SettlementItemDTO, error) {
+	if err := s.available(); err != nil {
+		return nil, err
+	}
+	return s.repo.ListSettlementItems(ctx, adminID, batchID)
+}
 func (s *Service) MarkSettlementBatch(ctx context.Context, adminID, id uint64) (*SettlementBatchDTO, error) {
 	if err := s.available(); err != nil {
 		return nil, err