feat(pickup): 支持线下提号 CSV 导出

backend/internal/modules/pickup/service.go

@@ -141,6 +141,29 @@ func (s *Service) ListAdmin(ctx context.Context, query AdminPickupQuery) (*Pagin
 	return s.repo.ListAdmin(ctx, query)
 }
 
+func (s *Service) ExportAdmin(
+	ctx context.Context,
+	query AdminPickupQuery,
+	adminID uint64,
+	meta auditlog.Meta,
+) ([]byte, int, error) {
+	if s.repo == nil {
+		return nil, 0, ErrDependencyUnavailable
+	}
+	items, err := s.repo.ListAdminForExport(ctx, query)
+	if err != nil {
+		return nil, 0, err
+	}
+	data, err := buildAdminPickupCSV(items)
+	if err != nil {
+		return nil, 0, err
+	}
+	if err := s.repo.RecordAdminPickupExport(ctx, adminID, meta, query, len(items)); err != nil {
+		return nil, 0, err
+	}
+	return data, len(items), nil
+}
+
 func (s *Service) ListShopNames(ctx context.Context, platform string) ([]string, error) {
 	if s.repo == nil {
 		return nil, ErrDependencyUnavailable
@@ -210,4 +233,3 @@ func (s *Service) DeleteShopMapping(ctx context.Context, sourceName string, admi
 	}
 	return s.repo.DeleteShopMapping(ctx, sourceName, adminID, meta)
 }
-