fix: сортировка строк по категории в pricing CSV и вкладке Ценообразование (no-BOM)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/services/export.go

@@ -450,7 +450,16 @@ func (s *ExportService) buildPricingExportBlock(cfg *models.Configuration, opts
 		return block, nil
 	}
 
+	catOrder := defaultCategoryOrder()
+	lotNames := make([]string, 0, len(cfg.Items))
 	for _, item := range cfg.Items {
+		if item.LotName != "" {
+			lotNames = append(lotNames, item.LotName)
+		}
+	}
+	itemCategories := s.resolveCategories(cfg.PricelistID, lotNames)
+	sortedItems := sortConfigItemsByCategoryMap(cfg.Items, catOrder, itemCategories)
+	for _, item := range sortedItems {
 		if item.LotName == "" {
 			continue
 		}
@@ -476,6 +485,22 @@ func (s *ExportService) buildPricingExportBlock(cfg *models.Configuration, opts
 	return block, nil
 }
 
+// sortConfigItemsByCategoryMap returns a copy of items sorted by category display order.
+// categories maps lot_name → category code; catOrder maps category code → display order.
+func sortConfigItemsByCategoryMap(items models.ConfigItems, catOrder map[string]int, categories map[string]string) models.ConfigItems {
+	sorted := make(models.ConfigItems, len(items))
+	copy(sorted, items)
+	sort.SliceStable(sorted, func(i, j int) bool {
+		orderI, hasI := categoryDisplayOrder(catOrder, categories[sorted[i].LotName])
+		orderJ, hasJ := categoryDisplayOrder(catOrder, categories[sorted[j].LotName])
+		if hasI && hasJ {
+			return orderI < orderJ
+		}
+		return hasI && !hasJ
+	})
+	return sorted
+}
+
 func applyDDPMarkup(rows []ProjectPricingExportRow, factor float64) {
 	for i := range rows {
 		rows[i].Estimate = scaleFloatPtr(rows[i].Estimate, factor)