Add article generation and pricelist categories

cmd/qfs/main.go

@@ -926,6 +926,23 @@ func setupRouter(cfg *config.Config, local *localdb.LocalDB, connMgr *db.Connect
 				c.JSON(http.StatusCreated, config)
 			})
 
+			configs.POST("/preview-article", func(c *gin.Context) {
+				var req services.ArticlePreviewRequest
+				if err := c.ShouldBindJSON(&req); err != nil {
+					c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+					return
+				}
+				result, err := configService.BuildArticlePreview(&req)
+				if err != nil {
+					c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+					return
+				}
+				c.JSON(http.StatusOK, gin.H{
+					"article":  result.Article,
+					"warnings": result.Warnings,
+				})
+			})
+
 			configs.GET("/:uuid", func(c *gin.Context) {
 				uuid := c.Param("uuid")
 				config, err := configService.GetByUUIDNoAuth(uuid)

csv_export.md

@@ -1,297 +0,0 @@
-# CSV Export Pattern (Go + GORM)
-
-## Архитектура (3-слойная)
-
-### 1. Handler Layer (HTTP)
-**Задачи**: Обработка HTTP-запроса, установка заголовков, инициация экспорта
-
-```go
-func (h *PricelistHandler) ExportCSV(c *gin.Context) {
-    // 1. Валидация параметров
-    id, err := strconv.ParseUint(c.Param("id"), 10, 32)
-
-    // 2. Получение метаданных для формирования имени файла
-    pl, err := h.service.GetByID(uint(id))
-
-    // 3. Установка HTTP-заголовков для скачивания
-    filename := fmt.Sprintf("pricelist_%s.csv", pl.Version)
-    c.Header("Content-Type", "text/csv; charset=utf-8")
-    c.Header("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", filename))
-
-    // 4. UTF-8 BOM для Excel-совместимости
-    c.Writer.Write([]byte{0xEF, 0xBB, 0xBF})
-
-    // 5. Настройка CSV writer
-    writer := csv.NewWriter(c.Writer)
-    writer.Comma = ';'  // Точка с запятой для Excel
-    defer writer.Flush()
-
-    // 6. Динамические заголовки (зависят от типа данных)
-    isWarehouse := strings.ToLower(pl.Source) == "warehouse"
-    var header []string
-    if isWarehouse {
-        header = []string{"Артикул", "Категория", "Описание", "Доступно", "Partnumbers", "Цена, $", "Настройки"}
-    } else {
-        header = []string{"Артикул", "Категория", "Описание", "Цена, $", "Настройки"}
-    }
-    writer.Write(header)
-
-    // 7. Streaming в batches через callback
-    err = h.service.StreamItemsForExport(uint(id), 500, func(items []models.PricelistItem) error {
-        for _, item := range items {
-            row := buildRow(item, isWarehouse)
-            if err := writer.Write(row); err != nil {
-                return err
-            }
-        }
-        writer.Flush()  // Flush после каждого batch
-        return nil
-    })
-}
-```
-
-### 2. Service Layer
-**Задачи**: Оркестрация, делегирование в репозиторий
-
-```go
-func (s *Service) StreamItemsForExport(pricelistID uint, batchSize int, callback func(items []models.PricelistItem) error) error {
-    if s.repo == nil {
-        return fmt.Errorf("offline mode: cannot stream pricelist items")
-    }
-    return s.repo.StreamItemsForExport(pricelistID, batchSize, callback)
-}
-```
-
-### 3. Repository Layer (Критичный)
-**Задачи**: Batch-загрузка из БД, оптимизация запросов, enrichment
-
-```go
-func (r *PricelistRepository) StreamItemsForExport(pricelistID uint, batchSize int, callback func(items []models.PricelistItem) error) error {
-    if batchSize <= 0 {
-        batchSize = 500  // Default batch size
-    }
-
-    // Проверка типа pricelist для conditional enrichment
-    var pl models.Pricelist
-    isWarehouse := false
-    if err := r.db.Select("source").Where("id = ?", pricelistID).First(&pl).Error; err == nil {
-        isWarehouse = pl.Source == string(models.PricelistSourceWarehouse)
-    }
-
-    offset := 0
-    for {
-        var items []models.PricelistItem
-
-        // ⚡ КЛЮЧЕВОЙ МОМЕНТ: JOIN для избежания N+1 запросов
-        err := r.db.Table("qt_pricelist_items AS pi").
-            Select("pi.*, COALESCE(l.lot_description, '') AS lot_description, COALESCE(l.lot_category, '') AS category").
-            Joins("LEFT JOIN lot AS l ON l.lot_name = pi.lot_name").
-            Where("pi.pricelist_id = ?", pricelistID).
-            Order("pi.lot_name").
-            Offset(offset).
-            Limit(batchSize).
-            Scan(&items).Error
-
-        if err != nil || len(items) == 0 {
-            break
-        }
-
-        // Conditional enrichment для warehouse данных
-        if isWarehouse {
-            r.enrichWarehouseItems(items)  // Добавление qty, partnumbers
-        }
-
-        // Вызов callback для обработки batch
-        if err := callback(items); err != nil {
-            return err
-        }
-
-        if len(items) < batchSize {
-            break  // Последний batch
-        }
-
-        offset += batchSize
-    }
-
-    return nil
-}
-```
-
-## Ключевые паттерны
-
-### 1. Streaming (не загружать все в память)
-```go
-// ❌ НЕ ТАК:
-var allItems []Item
-db.Find(&allItems)  // Может упасть на миллионах записей
-
-// ✅ ТАК:
-for offset := 0; ; offset += batchSize {
-    var batch []Item
-    db.Offset(offset).Limit(batchSize).Find(&batch)
-    processBatch(batch)
-    if len(batch) < batchSize {
-        break
-    }
-}
-```
-
-### 2. Callback Pattern для гибкости
-```go
-// Service не знает о CSV - может использоваться для любого экспорта
-func StreamItems(callback func([]Item) error) error
-```
-
-### 3. JOIN для избежания N+1
-```go
-// ❌ N+1 problem:
-items := getItems()
-for _, item := range items {
-    description := getLotDescription(item.LotName)  // N запросов
-}
-
-// ✅ JOIN:
-db.Table("items AS i").
-    Select("i.*, COALESCE(l.description, '') AS description").
-    Joins("LEFT JOIN lots AS l ON l.name = i.lot_name")
-```
-
-### 4. UTF-8 BOM для Excel
-```go
-// Excel на Windows требует BOM для корректного отображения UTF-8
-c.Writer.Write([]byte{0xEF, 0xBB, 0xBF})
-```
-
-### 5. Точка с запятой для Excel
-```go
-writer := csv.NewWriter(c.Writer)
-writer.Comma = ';'  // Excel в русской локали использует ;
-```
-
-### 6. Graceful Error Handling
-```go
-// После начала streaming нельзя вернуть JSON
-if err != nil {
-    // Уже начали писать CSV, поэтому пишем текст
-    c.String(http.StatusInternalServerError, "Export failed: %v", err)
-    return
-}
-```
-
-## Conditional Enrichment Pattern
-
-```go
-// Для warehouse прайслистов добавляем дополнительные поля
-func (r *PricelistRepository) enrichWarehouseItems(items []models.PricelistItem) error {
-    // 1. Собрать уникальные lot_names
-    lots := make([]string, 0, len(items))
-    seen := make(map[string]struct{})
-    for _, item := range items {
-        if _, ok := seen[item.LotName]; !ok {
-            lots = append(lots, item.LotName)
-            seen[item.LotName] = struct{}{}
-        }
-    }
-
-    // 2. Batch-загрузка метрик (qty, partnumbers)
-    qtyByLot, partnumbersByLot, err := warehouse.LoadLotMetrics(r.db, lots, true)
-
-    // 3. Обогащение items
-    for i := range items {
-        if qty, ok := qtyByLot[items[i].LotName]; ok {
-            items[i].AvailableQty = &qty
-        }
-        items[i].Partnumbers = partnumbersByLot[items[i].LotName]
-    }
-
-    return nil
-}
-```
-
-## Virtual Fields Pattern
-
-```go
-type PricelistItem struct {
-    // Stored fields
-    ID       uint    `gorm:"primaryKey"`
-    LotName  string  `gorm:"size:255"`
-    Price    float64 `gorm:"type:decimal(12,2)"`
-
-    // Virtual fields (populated via JOIN or programmatically)
-    LotDescription string   `gorm:"-:migration" json:"lot_description,omitempty"`
-    Category       string   `gorm:"-:migration" json:"category,omitempty"`
-    AvailableQty   *float64 `gorm:"-" json:"available_qty,omitempty"`
-    Partnumbers    []string `gorm:"-" json:"partnumbers,omitempty"`
-}
-```
-- `gorm:"-:migration"` - не создавать колонку в БД, но маппить при SELECT
-- `gorm:"-"` - полностью игнорировать при БД операциях
-
-## Checklist для CSV Export
-
-- [ ] HTTP заголовки: Content-Type, Content-Disposition
-- [ ] UTF-8 BOM для Excel (0xEF, 0xBB, 0xBF)
-- [ ] Разделитель (`;` для русской локали Excel)
-- [ ] Streaming с batch processing (не загружать всё в память)
-- [ ] JOIN для избежания N+1 запросов
-- [ ] Flush после каждого batch
-- [ ] Graceful error handling (нельзя JSON после начала streaming)
-- [ ] Динамические заголовки (если нужно)
-- [ ] Conditional enrichment (если данные зависят от типа)
-
-## Когда использовать этот паттерн
-
-✅ **Используй когда:**
-- Экспорт больших датасетов (>1000 записей)
-- Нужна Excel-совместимость
-- Связанные данные из нескольких таблиц
-- Conditional логика enrichment
-
-❌ **Не нужен когда:**
-- Малые датасеты (<100 записей) - можно загрузить всё сразу
-- Экспорт JSON/XML - другие подходы
-- Нет связанных данных - можно упростить
-
-## Пример роутинга (Gin)
-
-```go
-// В файле роутера
-func SetupRoutes(router *gin.Engine, handler *PricelistHandler) {
-    api := router.Group("/api")
-    {
-        pricelists := api.Group("/pricelists")
-        {
-            pricelists.GET("/:id/export", handler.ExportCSV)
-        }
-    }
-}
-```
-
-## Импорты
-
-```go
-import (
-    "encoding/csv"
-    "fmt"
-    "strconv"
-    "strings"
-
-    "github.com/gin-gonic/gin"
-    "gorm.io/gorm"
-)
-```
-
-## Performance Notes
-
-1. **Batch Size**: 500-1000 оптимально для большинства случаев
-2. **JOIN vs N+1**: JOIN на порядки быстрее при >100 записях
-3. **Memory**: Streaming позволяет экспортировать миллионы записей с минимальной памятью
-4. **Indexes**: Убедись что есть индексы на JOIN колонках
-
-## Источник
-
-Реализовано в проекте PriceForge:
-- Handler: `internal/handlers/pricelist.go:245-346`
-- Service: `internal/services/pricelist/service.go:373-379`
-- Repository: `internal/repository/pricelist.go:475-533`
-- Models: `internal/models/pricelist.go`

internal/article/categories.go

@@ -0,0 +1,106 @@
+package article
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"git.mchus.pro/mchus/quoteforge/internal/localdb"
+)
+
+// ErrMissingCategoryForLot is returned when a lot has no category in local_pricelist_items.lot_category.
+var ErrMissingCategoryForLot = errors.New("missing_category_for_lot")
+
+type MissingCategoryForLotError struct {
+	LotName string
+}
+
+func (e *MissingCategoryForLotError) Error() string {
+	if e == nil || strings.TrimSpace(e.LotName) == "" {
+		return ErrMissingCategoryForLot.Error()
+	}
+	return fmt.Sprintf("%s: %s", ErrMissingCategoryForLot.Error(), e.LotName)
+}
+
+func (e *MissingCategoryForLotError) Unwrap() error {
+	return ErrMissingCategoryForLot
+}
+
+type Group string
+
+const (
+	GroupCPU  Group = "CPU"
+	GroupMEM  Group = "MEM"
+	GroupGPU  Group = "GPU"
+	GroupDISK Group = "DISK"
+	GroupNET  Group = "NET"
+	GroupPSU  Group = "PSU"
+)
+
+// GroupForLotCategory maps pricelist lot_category codes into article groups.
+// Unknown/unrelated categories return ok=false.
+func GroupForLotCategory(cat string) (group Group, ok bool) {
+	c := strings.ToUpper(strings.TrimSpace(cat))
+	switch c {
+	case "CPU":
+		return GroupCPU, true
+	case "MEM":
+		return GroupMEM, true
+	case "GPU":
+		return GroupGPU, true
+	case "M2", "SSD", "HDD", "EDSFF", "HHHL":
+		return GroupDISK, true
+	case "NIC", "HCA", "DPU":
+		return GroupNET, true
+	case "HBA":
+		return GroupNET, true
+	case "PSU", "PS":
+		return GroupPSU, true
+	default:
+		return "", false
+	}
+}
+
+// ResolveLotCategoriesStrict resolves categories for lotNames using local_pricelist_items.lot_category
+// for a given server pricelist id. If any lot is missing or has empty category, returns an error.
+func ResolveLotCategoriesStrict(local *localdb.LocalDB, serverPricelistID uint, lotNames []string) (map[string]string, error) {
+	if local == nil {
+		return nil, fmt.Errorf("local db is nil")
+	}
+	cats, err := local.GetLocalLotCategoriesByServerPricelistID(serverPricelistID, lotNames)
+	if err != nil {
+		return nil, err
+	}
+	for _, lot := range lotNames {
+		cat := strings.TrimSpace(cats[lot])
+		if cat == "" {
+			return nil, &MissingCategoryForLotError{LotName: lot}
+		}
+		cats[lot] = cat
+	}
+	return cats, nil
+}
+
+// NormalizeServerModel produces a stable article segment for the server model.
+func NormalizeServerModel(model string) string {
+	trimmed := strings.TrimSpace(model)
+	if trimmed == "" {
+		return ""
+	}
+	upper := strings.ToUpper(trimmed)
+	var b strings.Builder
+	for _, r := range upper {
+		if r >= 'A' && r <= 'Z' {
+			b.WriteRune(r)
+			continue
+		}
+		if r >= '0' && r <= '9' {
+			b.WriteRune(r)
+			continue
+		}
+		if r == '.' {
+			b.WriteRune(r)
+		}
+	}
+	return b.String()
+}

internal/article/categories_test.go

@@ -0,0 +1,56 @@
+package article
+
+import (
+	"errors"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"git.mchus.pro/mchus/quoteforge/internal/localdb"
+)
+
+func TestResolveLotCategoriesStrict_MissingCategoryReturnsError(t *testing.T) {
+	local, err := localdb.New(filepath.Join(t.TempDir(), "local.db"))
+	if err != nil {
+		t.Fatalf("init local db: %v", err)
+	}
+	t.Cleanup(func() { _ = local.Close() })
+
+	if err := local.SaveLocalPricelist(&localdb.LocalPricelist{
+		ServerID:  1,
+		Source:    "estimate",
+		Version:   "S-2026-02-11-001",
+		Name:      "test",
+		CreatedAt: time.Now(),
+		SyncedAt:  time.Now(),
+	}); err != nil {
+		t.Fatalf("save local pricelist: %v", err)
+	}
+	localPL, err := local.GetLocalPricelistByServerID(1)
+	if err != nil {
+		t.Fatalf("get local pricelist: %v", err)
+	}
+	if err := local.SaveLocalPricelistItems([]localdb.LocalPricelistItem{
+		{PricelistID: localPL.ID, LotName: "CPU_A", LotCategory: "", Price: 10},
+	}); err != nil {
+		t.Fatalf("save local items: %v", err)
+	}
+
+	_, err = ResolveLotCategoriesStrict(local, 1, []string{"CPU_A"})
+	if err == nil {
+		t.Fatalf("expected error")
+	}
+	if !errors.Is(err, ErrMissingCategoryForLot) {
+		t.Fatalf("expected ErrMissingCategoryForLot, got %v", err)
+	}
+}
+
+func TestGroupForLotCategory(t *testing.T) {
+	if g, ok := GroupForLotCategory("cpu"); !ok || g != GroupCPU {
+		t.Fatalf("expected cpu -> GroupCPU")
+	}
+	if g, ok := GroupForLotCategory("SFP"); ok || g != "" {
+		t.Fatalf("expected SFP to be excluded")
+	}
+}
+

internal/article/generator.go

@@ -0,0 +1,496 @@
+package article
+
+import (
+	"fmt"
+	"regexp"
+	"sort"
+	"strings"
+
+	"git.mchus.pro/mchus/quoteforge/internal/localdb"
+	"git.mchus.pro/mchus/quoteforge/internal/models"
+)
+
+type BuildOptions struct {
+	ServerModel     string
+	SupportCode     string
+	ServerPricelist *uint
+}
+
+type BuildResult struct {
+	Article  string
+	Warnings []string
+}
+
+var (
+	reMemGiB = regexp.MustCompile(`(?i)(\d+)\s*(GB|G)`)
+	reMemTiB = regexp.MustCompile(`(?i)(\d+)\s*(TB|T)`)
+	reCapacityT = regexp.MustCompile(`(?i)(\d+(?:[.,]\d+)?)T`)
+	reCapacityG = regexp.MustCompile(`(?i)(\d+(?:[.,]\d+)?)G`)
+	rePortSpeed = regexp.MustCompile(`(?i)(\d+)p(\d+)(GbE|G)`)
+	rePortFC = regexp.MustCompile(`(?i)(\d+)pFC(\d+)`)
+	reWatts = regexp.MustCompile(`(?i)(\d{3,5})\s*W`)
+)
+
+func Build(local *localdb.LocalDB, items []models.ConfigItem, opts BuildOptions) (BuildResult, error) {
+	segments := make([]string, 0, 8)
+	warnings := make([]string, 0)
+
+	model := NormalizeServerModel(opts.ServerModel)
+	if model == "" {
+		return BuildResult{}, fmt.Errorf("server_model required")
+	}
+	segments = append(segments, model)
+
+	lotNames := make([]string, 0, len(items))
+	for _, it := range items {
+		lotNames = append(lotNames, it.LotName)
+	}
+
+	if opts.ServerPricelist == nil || *opts.ServerPricelist == 0 {
+		return BuildResult{}, fmt.Errorf("pricelist_id required for article")
+	}
+
+	cats, err := ResolveLotCategoriesStrict(local, *opts.ServerPricelist, lotNames)
+	if err != nil {
+		return BuildResult{}, err
+	}
+
+	cpuSeg := buildCPUSegment(items, cats)
+	if cpuSeg != "" {
+		segments = append(segments, cpuSeg)
+	}
+	memSeg, memWarn := buildMemSegment(items, cats)
+	if memWarn != "" {
+		warnings = append(warnings, memWarn)
+	}
+	if memSeg != "" {
+		segments = append(segments, memSeg)
+	}
+	gpuSeg := buildGPUSegment(items, cats)
+	if gpuSeg != "" {
+		segments = append(segments, gpuSeg)
+	}
+	diskSeg, diskWarn := buildDiskSegment(items, cats)
+	if diskWarn != "" {
+		warnings = append(warnings, diskWarn)
+	}
+	if diskSeg != "" {
+		segments = append(segments, diskSeg)
+	}
+	netSeg, netWarn := buildNetSegment(items, cats)
+	if netWarn != "" {
+		warnings = append(warnings, netWarn)
+	}
+	if netSeg != "" {
+		segments = append(segments, netSeg)
+	}
+	psuSeg, psuWarn := buildPSUSegment(items, cats)
+	if psuWarn != "" {
+		warnings = append(warnings, psuWarn)
+	}
+	if psuSeg != "" {
+		segments = append(segments, psuSeg)
+	}
+
+	if strings.TrimSpace(opts.SupportCode) != "" {
+		code := strings.TrimSpace(opts.SupportCode)
+		if !isSupportCodeValid(code) {
+			return BuildResult{}, fmt.Errorf("invalid_support_code")
+		}
+		segments = append(segments, code)
+	}
+
+	article := strings.Join(segments, "-")
+	if len([]rune(article)) > 80 {
+		article = compressArticle(segments)
+		warnings = append(warnings, "compressed")
+	}
+	if len([]rune(article)) > 80 {
+		return BuildResult{}, fmt.Errorf("article_overflow")
+	}
+
+	return BuildResult{Article: article, Warnings: warnings}, nil
+}
+
+func isSupportCodeValid(code string) bool {
+	if len(code) < 3 {
+		return false
+	}
+	if !strings.Contains(code, "y") {
+		return false
+	}
+	parts := strings.Split(code, "y")
+	if len(parts) != 2 || parts[0] == "" || parts[1] == "" {
+		return false
+	}
+	for _, r := range parts[0] {
+		if r < '0' || r > '9' {
+			return false
+		}
+	}
+	switch parts[1] {
+	case "W", "B", "S", "P":
+		return true
+	default:
+		return false
+	}
+}
+
+func buildCPUSegment(items []models.ConfigItem, cats map[string]string) string {
+	type agg struct {
+		qty int
+	}
+	models := map[string]*agg{}
+	total := 0
+	for _, it := range items {
+		group, ok := GroupForLotCategory(cats[it.LotName])
+		if !ok || group != GroupCPU {
+			continue
+		}
+		model := parseCPUModel(it.LotName)
+		if model == "" {
+			model = "UNK"
+		}
+		if _, ok := models[model]; !ok {
+			models[model] = &agg{}
+		}
+		models[model].qty += it.Quantity
+		total += it.Quantity
+	}
+	if total == 0 {
+		return ""
+	}
+	if len(models) == 1 {
+		for model, a := range models {
+			return fmt.Sprintf("%dx%s", a.qty, model)
+		}
+	}
+	if len(models) <= 2 {
+		parts := make([]string, 0, len(models))
+		for model, a := range models {
+			parts = append(parts, fmt.Sprintf("%dx%s", a.qty, model))
+		}
+		sort.Strings(parts)
+		return strings.Join(parts, "+")
+	}
+	return fmt.Sprintf("%dxMIX", total)
+}
+
+func buildMemSegment(items []models.ConfigItem, cats map[string]string) (string, string) {
+	totalGiB := 0
+	for _, it := range items {
+		group, ok := GroupForLotCategory(cats[it.LotName])
+		if !ok || group != GroupMEM {
+			continue
+		}
+		per := parseMemGiB(it.LotName)
+		if per <= 0 {
+			return "", "mem_unknown"
+		}
+		totalGiB += per * it.Quantity
+	}
+	if totalGiB == 0 {
+		return "", ""
+	}
+	if totalGiB%1024 == 0 {
+		return fmt.Sprintf("%dT", totalGiB/1024), ""
+	}
+	return fmt.Sprintf("%dG", totalGiB), ""
+}
+
+func buildGPUSegment(items []models.ConfigItem, cats map[string]string) string {
+	models := map[string]int{}
+	total := 0
+	for _, it := range items {
+		group, ok := GroupForLotCategory(cats[it.LotName])
+		if !ok || group != GroupGPU {
+			continue
+		}
+		model := parseGPUModel(it.LotName)
+		if model == "" {
+			model = "UNK"
+		}
+		models[model] += it.Quantity
+		total += it.Quantity
+	}
+	if total == 0 {
+		return ""
+	}
+	if len(models) <= 2 {
+		parts := make([]string, 0, len(models))
+		for model, qty := range models {
+			parts = append(parts, fmt.Sprintf("%dx%s", qty, model))
+		}
+		sort.Strings(parts)
+		return strings.Join(parts, "+")
+	}
+	return fmt.Sprintf("%dxMIX", total)
+}
+
+func buildDiskSegment(items []models.ConfigItem, cats map[string]string) (string, string) {
+	type key struct {
+		t string
+		c string
+	}
+	groupQty := map[key]int{}
+	total := 0
+	warn := ""
+	for _, it := range items {
+		group, ok := GroupForLotCategory(cats[it.LotName])
+		if !ok || group != GroupDISK {
+			continue
+		}
+		capToken := parseCapacity(it.LotName)
+		if capToken == "" {
+			warn = "disk_unknown"
+		}
+		typeCode := diskTypeCode(cats[it.LotName], it.LotName)
+		k := key{t: typeCode, c: capToken}
+		groupQty[k] += it.Quantity
+		total += it.Quantity
+	}
+	if total == 0 {
+		return "", ""
+	}
+	parts := make([]string, 0, len(groupQty))
+	for k, qty := range groupQty {
+		if k.c == "" {
+			parts = append(parts, fmt.Sprintf("%dx%s", qty, k.t))
+		} else {
+			parts = append(parts, fmt.Sprintf("%dx%s%s", qty, k.c, k.t))
+		}
+	}
+	sort.Strings(parts)
+	if len(parts) > 2 {
+		return fmt.Sprintf("%dxMIXD", total), warn
+	}
+	return strings.Join(parts, "+"), warn
+}
+
+func buildNetSegment(items []models.ConfigItem, cats map[string]string) (string, string) {
+	groupQty := map[string]int{}
+	total := 0
+	warn := ""
+	for _, it := range items {
+		group, ok := GroupForLotCategory(cats[it.LotName])
+		if !ok || group != GroupNET {
+			continue
+		}
+		profile := parsePortSpeed(it.LotName)
+		if profile == "" {
+			profile = "UNKNET"
+			warn = "net_unknown"
+		}
+		groupQty[profile] += it.Quantity
+		total += it.Quantity
+	}
+	if total == 0 {
+		return "", ""
+	}
+	parts := make([]string, 0, len(groupQty))
+	for profile, qty := range groupQty {
+		parts = append(parts, fmt.Sprintf("%dx%s", qty, profile))
+	}
+	sort.Strings(parts)
+	if len(parts) > 2 {
+		return fmt.Sprintf("%dxMIXN", total), warn
+	}
+	return strings.Join(parts, "+"), warn
+}
+
+func buildPSUSegment(items []models.ConfigItem, cats map[string]string) (string, string) {
+	groupQty := map[string]int{}
+	total := 0
+	warn := ""
+	for _, it := range items {
+		group, ok := GroupForLotCategory(cats[it.LotName])
+		if !ok || group != GroupPSU {
+			continue
+		}
+		rating := parseWatts(it.LotName)
+		if rating == "" {
+			rating = "UNKPSU"
+			warn = "psu_unknown"
+		}
+		groupQty[rating] += it.Quantity
+		total += it.Quantity
+	}
+	if total == 0 {
+		return "", ""
+	}
+	parts := make([]string, 0, len(groupQty))
+	for rating, qty := range groupQty {
+		parts = append(parts, fmt.Sprintf("%dx%s", qty, rating))
+	}
+	sort.Strings(parts)
+	if len(parts) > 2 {
+		return fmt.Sprintf("%dxMIXP", total), warn
+	}
+	return strings.Join(parts, "+"), warn
+}
+
+func normalizeModelToken(lotName string) string {
+	if idx := strings.Index(lotName, "_"); idx >= 0 && idx+1 < len(lotName) {
+		lotName = lotName[idx+1:]
+	}
+	parts := strings.Split(lotName, "_")
+	token := parts[len(parts)-1]
+	return strings.ToUpper(strings.TrimSpace(token))
+}
+
+func parseCPUModel(lotName string) string {
+	parts := strings.Split(lotName, "_")
+	if len(parts) >= 2 {
+		last := strings.ToUpper(strings.TrimSpace(parts[len(parts)-1]))
+		if last != "" {
+			return last
+		}
+	}
+	return normalizeModelToken(lotName)
+}
+
+func parseGPUModel(lotName string) string {
+	upper := strings.ToUpper(lotName)
+	if idx := strings.Index(upper, "GPU_"); idx >= 0 {
+		upper = upper[idx+4:]
+	}
+	parts := strings.Split(upper, "_")
+	model := ""
+	mem := ""
+	for i, p := range parts {
+		if p == "" {
+			continue
+		}
+		switch p {
+		case "NV", "NVIDIA", "AMD", "RADEON", "PCIE", "PCI", "SXM", "SXMX":
+			continue
+		default:
+			if strings.Contains(p, "GB") {
+				mem = p
+				continue
+			}
+			if model == "" && (i > 0) {
+				model = p
+			}
+		}
+	}
+	if model != "" && mem != "" {
+		return model + "_" + mem
+	}
+	if model != "" {
+		return model
+	}
+	return normalizeModelToken(lotName)
+}
+
+func parseMemGiB(lotName string) int {
+	if m := reMemTiB.FindStringSubmatch(lotName); len(m) == 3 {
+		return atoi(m[1]) * 1024
+	}
+	if m := reMemGiB.FindStringSubmatch(lotName); len(m) == 3 {
+		return atoi(m[1])
+	}
+	return 0
+}
+
+func parseCapacity(lotName string) string {
+	if m := reCapacityT.FindStringSubmatch(lotName); len(m) == 2 {
+		return normalizeTToken(strings.ReplaceAll(m[1], ",", ".")) + "T"
+	}
+	if m := reCapacityG.FindStringSubmatch(lotName); len(m) == 2 {
+		return normalizeNumberToken(strings.ReplaceAll(m[1], ",", ".")) + "G"
+	}
+	return ""
+}
+
+func diskTypeCode(cat string, lotName string) string {
+	c := strings.ToUpper(strings.TrimSpace(cat))
+	if c == "M2" {
+		return "M2"
+	}
+	upper := strings.ToUpper(lotName)
+	if strings.Contains(upper, "NVME") {
+		return "NV"
+	}
+	if strings.Contains(upper, "SAS") {
+		return "SAS"
+	}
+	if strings.Contains(upper, "SATA") {
+		return "SAT"
+	}
+	return c
+}
+
+func parsePortSpeed(lotName string) string {
+	if m := rePortSpeed.FindStringSubmatch(lotName); len(m) == 4 {
+		return fmt.Sprintf("%sp%sG", m[1], m[2])
+	}
+	if m := rePortFC.FindStringSubmatch(lotName); len(m) == 3 {
+		return fmt.Sprintf("%spFC%s", m[1], m[2])
+	}
+	return ""
+}
+
+func parseWatts(lotName string) string {
+	if m := reWatts.FindStringSubmatch(lotName); len(m) == 2 {
+		w := atoi(m[1])
+		if w >= 1000 {
+			kw := fmt.Sprintf("%.1f", float64(w)/1000.0)
+			kw = strings.TrimSuffix(kw, ".0")
+			return fmt.Sprintf("%skW", kw)
+		}
+		return fmt.Sprintf("%dW", w)
+	}
+	return ""
+}
+
+func normalizeNumberToken(raw string) string {
+	raw = strings.TrimSpace(raw)
+	raw = strings.TrimLeft(raw, "0")
+	if raw == "" || raw[0] == '.' {
+		raw = "0" + raw
+	}
+	return raw
+}
+
+func normalizeTToken(raw string) string {
+	raw = normalizeNumberToken(raw)
+	parts := strings.SplitN(raw, ".", 2)
+	intPart := parts[0]
+	frac := ""
+	if len(parts) == 2 {
+		frac = parts[1]
+	}
+	if frac == "" {
+		frac = "0"
+	}
+	if len(intPart) >= 2 {
+		return intPart + "." + frac
+	}
+	if len(frac) > 1 {
+		frac = frac[:1]
+	}
+	return intPart + "." + frac
+}
+
+func atoi(v string) int {
+	n := 0
+	for _, r := range v {
+		if r < '0' || r > '9' {
+			continue
+		}
+		n = n*10 + int(r-'0')
+	}
+	return n
+}
+
+func compressArticle(segments []string) string {
+	if len(segments) == 0 {
+		return ""
+	}
+	normalized := make([]string, 0, len(segments))
+	for _, s := range segments {
+		normalized = append(normalized, strings.ReplaceAll(s, "GbE", "G"))
+	}
+	return strings.Join(normalized, "-")
+}

internal/article/generator_test.go

@@ -0,0 +1,66 @@
+package article
+
+import (
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"git.mchus.pro/mchus/quoteforge/internal/localdb"
+	"git.mchus.pro/mchus/quoteforge/internal/models"
+)
+
+func TestBuild_ParsesNetAndPSU(t *testing.T) {
+	local, err := localdb.New(filepath.Join(t.TempDir(), "local.db"))
+	if err != nil {
+		t.Fatalf("init local db: %v", err)
+	}
+	t.Cleanup(func() { _ = local.Close() })
+
+	if err := local.SaveLocalPricelist(&localdb.LocalPricelist{
+		ServerID:  1,
+		Source:    "estimate",
+		Version:   "S-2026-02-11-001",
+		Name:      "test",
+		CreatedAt: time.Now(),
+		SyncedAt:  time.Now(),
+	}); err != nil {
+		t.Fatalf("save local pricelist: %v", err)
+	}
+	localPL, err := local.GetLocalPricelistByServerID(1)
+	if err != nil {
+		t.Fatalf("get local pricelist: %v", err)
+	}
+
+	if err := local.SaveLocalPricelistItems([]localdb.LocalPricelistItem{
+		{PricelistID: localPL.ID, LotName: "NIC_2p25G_MCX512A-AC", LotCategory: "NIC", Price: 1},
+		{PricelistID: localPL.ID, LotName: "HBA_2pFC32_Gen6", LotCategory: "HBA", Price: 1},
+		{PricelistID: localPL.ID, LotName: "PS_1000W_Platinum", LotCategory: "PS", Price: 1},
+	}); err != nil {
+		t.Fatalf("save local items: %v", err)
+	}
+
+	items := models.ConfigItems{
+		{LotName: "NIC_2p25G_MCX512A-AC", Quantity: 1},
+		{LotName: "HBA_2pFC32_Gen6", Quantity: 1},
+		{LotName: "PS_1000W_Platinum", Quantity: 2},
+	}
+	result, err := Build(local, items, BuildOptions{
+		ServerModel:     "DL380GEN11",
+		SupportCode:     "1yW",
+		ServerPricelist: &localPL.ServerID,
+	})
+	if err != nil {
+		t.Fatalf("build article: %v", err)
+	}
+	if result.Article == "" {
+		t.Fatalf("expected article to be non-empty")
+	}
+	if contains(result.Article, "UNKNET") || contains(result.Article, "UNKPSU") {
+		t.Fatalf("unexpected UNK in article: %s", result.Article)
+	}
+}
+
+func contains(s, sub string) bool {
+	return strings.Contains(s, sub)
+}

internal/handlers/export.go

@@ -3,6 +3,7 @@ package handlers
 import (
 	"fmt"
 	"net/http"
+	"strings"
 	"time"
 
 	"git.mchus.pro/mchus/quoteforge/internal/middleware"
@@ -35,6 +36,7 @@ type ExportRequest struct {
 	Name         string `json:"name" binding:"required"`
 	ProjectName  string `json:"project_name"`
 	ProjectUUID  string `json:"project_uuid"`
+	Article      string `json:"article"`
 	Items        []struct {
 		LotName   string  `json:"lot_name" binding:"required"`
 		Quantity  int     `json:"quantity" binding:"required,min=1"`
@@ -73,7 +75,11 @@ func (h *ExportHandler) ExportCSV(c *gin.Context) {
 
 	// Set headers before streaming
 	exportDate := data.CreatedAt
-	filename := fmt.Sprintf("%s (%s) %s BOM.csv", exportDate.Format("2006-01-02"), projectName, req.Name)
+	articleSegment := sanitizeFilenameSegment(req.Article)
+	if articleSegment == "" {
+		articleSegment = "BOM"
+	}
+	filename := fmt.Sprintf("%s (%s) %s %s.csv", exportDate.Format("2006-01-02"), projectName, req.Name, articleSegment)
 	c.Header("Content-Type", "text/csv; charset=utf-8")
 	c.Header("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", filename))
 
@@ -116,6 +122,7 @@ func (h *ExportHandler) buildExportData(req *ExportRequest) *services.ExportData
 
 	return &services.ExportData{
 		Name:      req.Name,
+		Article:   req.Article,
 		Items:     items,
 		Total:     total,
 		Notes:     req.Notes,
@@ -123,6 +130,24 @@ func (h *ExportHandler) buildExportData(req *ExportRequest) *services.ExportData
 	}
 }
 
+func sanitizeFilenameSegment(value string) string {
+	if strings.TrimSpace(value) == "" {
+		return ""
+	}
+	replacer := strings.NewReplacer(
+		"/", "_",
+		"\\", "_",
+		":", "_",
+		"*", "_",
+		"?", "_",
+		"\"", "_",
+		"<", "_",
+		">", "_",
+		"|", "_",
+	)
+	return strings.TrimSpace(replacer.Replace(value))
+}
+
 func (h *ExportHandler) ExportConfigCSV(c *gin.Context) {
 	username := middleware.GetUsername(c)
 	uuid := c.Param("uuid")

internal/handlers/pricelist.go

@@ -157,15 +157,11 @@ func (h *PricelistHandler) GetItems(c *gin.Context) {
 	}
 	resultItems := make([]gin.H, 0, len(items))
 	for _, item := range items {
-		category := ""
-		if parts := strings.SplitN(item.LotName, "_", 2); len(parts) > 0 {
-			category = parts[0]
-		}
 		resultItems = append(resultItems, gin.H{
 			"id":            item.ID,
 			"lot_name":      item.LotName,
 			"price":         item.Price,
-			"category":      category,
+			"category":      item.LotCategory,
 			"available_qty": item.AvailableQty,
 			"partnumbers":   []string(item.Partnumbers),
 		})

internal/handlers/pricelist_test.go

@@ -0,0 +1,84 @@
+package handlers
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"git.mchus.pro/mchus/quoteforge/internal/localdb"
+	"github.com/gin-gonic/gin"
+)
+
+func TestPricelistGetItems_ReturnsLotCategoryFromLocalPricelistItems(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	local, err := localdb.New(filepath.Join(t.TempDir(), "local.db"))
+	if err != nil {
+		t.Fatalf("init local db: %v", err)
+	}
+	t.Cleanup(func() { _ = local.Close() })
+
+	if err := local.SaveLocalPricelist(&localdb.LocalPricelist{
+		ServerID:  1,
+		Source:    "estimate",
+		Version:   "S-2026-02-11-001",
+		Name:      "test",
+		CreatedAt: time.Now(),
+		SyncedAt:  time.Now(),
+		IsUsed:    false,
+	}); err != nil {
+		t.Fatalf("save local pricelist: %v", err)
+	}
+	localPL, err := local.GetLocalPricelistByServerID(1)
+	if err != nil {
+		t.Fatalf("get local pricelist: %v", err)
+	}
+	if err := local.SaveLocalPricelistItems([]localdb.LocalPricelistItem{
+		{
+			PricelistID: localPL.ID,
+			LotName:     "NO_UNDERSCORE_NAME",
+			LotCategory: "CPU",
+			Price:       10,
+		},
+	}); err != nil {
+		t.Fatalf("save local pricelist items: %v", err)
+	}
+
+	h := NewPricelistHandler(local)
+
+	req, _ := http.NewRequest("GET", "/api/pricelists/1/items?page=1&per_page=50", nil)
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	c.Request = req
+	c.Params = gin.Params{{Key: "id", Value: "1"}}
+
+	h.GetItems(c)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected status 200, got %d: %s", w.Code, w.Body.String())
+	}
+
+	var resp struct {
+		Items []struct {
+			LotName   string `json:"lot_name"`
+			Category  string `json:"category"`
+			UnitPrice any    `json:"price"`
+		} `json:"items"`
+	}
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("unmarshal response: %v", err)
+	}
+	if len(resp.Items) != 1 {
+		t.Fatalf("expected 1 item, got %d", len(resp.Items))
+	}
+	if resp.Items[0].LotName != "NO_UNDERSCORE_NAME" {
+		t.Fatalf("expected lot_name NO_UNDERSCORE_NAME, got %q", resp.Items[0].LotName)
+	}
+	if resp.Items[0].Category != "CPU" {
+		t.Fatalf("expected category CPU, got %q", resp.Items[0].Category)
+	}
+}
+

internal/localdb/converters.go

@@ -28,6 +28,9 @@ func ConfigurationToLocal(cfg *models.Configuration) *LocalConfiguration {
 		Notes:            cfg.Notes,
 		IsTemplate:       cfg.IsTemplate,
 		ServerCount:      cfg.ServerCount,
+		ServerModel:      cfg.ServerModel,
+		SupportCode:      cfg.SupportCode,
+		Article:          cfg.Article,
 		PricelistID:      cfg.PricelistID,
 		OnlyInStock:      cfg.OnlyInStock,
 		PriceUpdatedAt:   cfg.PriceUpdatedAt,
@@ -72,6 +75,9 @@ func LocalToConfiguration(local *LocalConfiguration) *models.Configuration {
 		Notes:          local.Notes,
 		IsTemplate:     local.IsTemplate,
 		ServerCount:    local.ServerCount,
+		ServerModel:    local.ServerModel,
+		SupportCode:    local.SupportCode,
+		Article:        local.Article,
 		PricelistID:    local.PricelistID,
 		OnlyInStock:    local.OnlyInStock,
 		PriceUpdatedAt: local.PriceUpdatedAt,
@@ -169,6 +175,7 @@ func PricelistItemToLocal(item *models.PricelistItem, localPricelistID uint) *Lo
 	return &LocalPricelistItem{
 		PricelistID:  localPricelistID,
 		LotName:      item.LotName,
+		LotCategory:  item.LotCategory,
 		Price:        item.Price,
 		AvailableQty: item.AvailableQty,
 		Partnumbers:  partnumbers,
@@ -183,6 +190,7 @@ func LocalToPricelistItem(local *LocalPricelistItem, serverPricelistID uint) *mo
 		ID:           local.ID,
 		PricelistID:  serverPricelistID,
 		LotName:      local.LotName,
+		LotCategory:  local.LotCategory,
 		Price:        local.Price,
 		AvailableQty: local.AvailableQty,
 		Partnumbers:  partnumbers,

internal/localdb/converters_test.go

@@ -0,0 +1,34 @@
+package localdb
+
+import (
+	"testing"
+
+	"git.mchus.pro/mchus/quoteforge/internal/models"
+)
+
+func TestPricelistItemToLocal_PreservesLotCategory(t *testing.T) {
+	item := &models.PricelistItem{
+		LotName:     "CPU_A",
+		LotCategory: "CPU",
+		Price:       10,
+	}
+
+	local := PricelistItemToLocal(item, 123)
+	if local.LotCategory != "CPU" {
+		t.Fatalf("expected LotCategory=CPU, got %q", local.LotCategory)
+	}
+}
+
+func TestLocalToPricelistItem_PreservesLotCategory(t *testing.T) {
+	local := &LocalPricelistItem{
+		LotName:     "CPU_A",
+		LotCategory: "CPU",
+		Price:       10,
+	}
+
+	item := LocalToPricelistItem(local, 456)
+	if item.LotCategory != "CPU" {
+		t.Fatalf("expected LotCategory=CPU, got %q", item.LotCategory)
+	}
+}
+

internal/localdb/localdb.go

@@ -645,6 +645,17 @@ func (l *LocalDB) CountLocalPricelistItems(pricelistID uint) int64 {
 	return count
 }
 
+// CountLocalPricelistItemsWithEmptyCategory returns the number of items for a pricelist with missing lot_category.
+func (l *LocalDB) CountLocalPricelistItemsWithEmptyCategory(pricelistID uint) (int64, error) {
+	var count int64
+	if err := l.db.Model(&LocalPricelistItem{}).
+		Where("pricelist_id = ? AND (lot_category IS NULL OR TRIM(lot_category) = '')", pricelistID).
+		Count(&count).Error; err != nil {
+		return 0, err
+	}
+	return count, nil
+}
+
 // SaveLocalPricelistItems saves pricelist items to local SQLite
 func (l *LocalDB) SaveLocalPricelistItems(items []LocalPricelistItem) error {
 	if len(items) == 0 {
@@ -665,6 +676,30 @@ func (l *LocalDB) SaveLocalPricelistItems(items []LocalPricelistItem) error {
 	return nil
 }
 
+// ReplaceLocalPricelistItems atomically replaces all items for a pricelist.
+func (l *LocalDB) ReplaceLocalPricelistItems(pricelistID uint, items []LocalPricelistItem) error {
+	return l.db.Transaction(func(tx *gorm.DB) error {
+		if err := tx.Where("pricelist_id = ?", pricelistID).Delete(&LocalPricelistItem{}).Error; err != nil {
+			return err
+		}
+		if len(items) == 0 {
+			return nil
+		}
+
+		batchSize := 500
+		for i := 0; i < len(items); i += batchSize {
+			end := i + batchSize
+			if end > len(items) {
+				end = len(items)
+			}
+			if err := tx.CreateInBatches(items[i:end], batchSize).Error; err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}
+
 // GetLocalPricelistItems returns items for a local pricelist
 func (l *LocalDB) GetLocalPricelistItems(pricelistID uint) ([]LocalPricelistItem, error) {
 	var items []LocalPricelistItem
@@ -684,6 +719,36 @@ func (l *LocalDB) GetLocalPriceForLot(pricelistID uint, lotName string) (float64
 	return item.Price, nil
 }
 
+// GetLocalLotCategoriesByServerPricelistID returns lot_category for each lot_name from a local pricelist resolved by server ID.
+// Missing lots are not included in the map; caller is responsible for strict validation.
+func (l *LocalDB) GetLocalLotCategoriesByServerPricelistID(serverPricelistID uint, lotNames []string) (map[string]string, error) {
+	result := make(map[string]string, len(lotNames))
+	if serverPricelistID == 0 || len(lotNames) == 0 {
+		return result, nil
+	}
+
+	localPL, err := l.GetLocalPricelistByServerID(serverPricelistID)
+	if err != nil {
+		return nil, err
+	}
+
+	type row struct {
+		LotName     string `gorm:"column:lot_name"`
+		LotCategory string `gorm:"column:lot_category"`
+	}
+	var rows []row
+	if err := l.db.Model(&LocalPricelistItem{}).
+		Select("lot_name, lot_category").
+		Where("pricelist_id = ? AND lot_name IN ?", localPL.ID, lotNames).
+		Find(&rows).Error; err != nil {
+		return nil, err
+	}
+	for _, r := range rows {
+		result[r.LotName] = r.LotCategory
+	}
+	return result, nil
+}
+
 // MarkPricelistAsUsed marks a pricelist as used by a configuration
 func (l *LocalDB) MarkPricelistAsUsed(pricelistID uint, isUsed bool) error {
 	return l.db.Model(&LocalPricelist{}).Where("id = ?", pricelistID).

internal/localdb/migrations.go

@@ -68,6 +68,26 @@ var localMigrations = []localMigration{
 		name: "Add warehouse_pricelist_id and competitor_pricelist_id to local_configurations",
 		run:  addWarehouseCompetitorPriceLists,
 	},
+	{
+		id:   "2026_02_11_local_pricelist_item_category",
+		name: "Add lot_category to local_pricelist_items and create indexes",
+		run:  addLocalPricelistItemCategoryAndIndexes,
+	},
+	{
+		id:   "2026_02_11_local_config_article",
+		name: "Add article to local_configurations",
+		run:  addLocalConfigurationArticle,
+	},
+	{
+		id:   "2026_02_11_local_config_server_model",
+		name: "Add server_model to local_configurations",
+		run:  addLocalConfigurationServerModel,
+	},
+	{
+		id:   "2026_02_11_local_config_support_code",
+		name: "Add support_code to local_configurations",
+		run:  addLocalConfigurationSupportCode,
+	},
 }
 
 func runLocalMigrations(db *gorm.DB) error {
@@ -436,3 +456,112 @@ func addWarehouseCompetitorPriceLists(tx *gorm.DB) error {
 	slog.Info("added warehouse and competitor pricelist fields to local_configurations")
 	return nil
 }
+
+func addLocalPricelistItemCategoryAndIndexes(tx *gorm.DB) error {
+	type columnInfo struct {
+		Name string `gorm:"column:name"`
+	}
+
+	var columns []columnInfo
+	if err := tx.Raw(`
+		SELECT name FROM pragma_table_info('local_pricelist_items')
+		WHERE name IN ('lot_category')
+	`).Scan(&columns).Error; err != nil {
+		return fmt.Errorf("check local_pricelist_items(lot_category) existence: %w", err)
+	}
+
+	if len(columns) == 0 {
+		if err := tx.Exec(`
+			ALTER TABLE local_pricelist_items
+			ADD COLUMN lot_category TEXT
+		`).Error; err != nil {
+			return fmt.Errorf("add local_pricelist_items.lot_category: %w", err)
+		}
+		slog.Info("added lot_category to local_pricelist_items")
+	}
+
+	if err := tx.Exec(`
+		CREATE INDEX IF NOT EXISTS idx_local_pricelist_items_pricelist_lot
+		ON local_pricelist_items(pricelist_id, lot_name)
+	`).Error; err != nil {
+		return fmt.Errorf("ensure idx_local_pricelist_items_pricelist_lot: %w", err)
+	}
+
+	if err := tx.Exec(`
+		CREATE INDEX IF NOT EXISTS idx_local_pricelist_items_lot_category
+		ON local_pricelist_items(lot_category)
+	`).Error; err != nil {
+		return fmt.Errorf("ensure idx_local_pricelist_items_lot_category: %w", err)
+	}
+
+	return nil
+}
+
+func addLocalConfigurationArticle(tx *gorm.DB) error {
+	type columnInfo struct {
+		Name string `gorm:"column:name"`
+	}
+	var columns []columnInfo
+	if err := tx.Raw(`
+		SELECT name FROM pragma_table_info('local_configurations')
+		WHERE name IN ('article')
+	`).Scan(&columns).Error; err != nil {
+		return fmt.Errorf("check local_configurations(article) existence: %w", err)
+	}
+	if len(columns) == 0 {
+		if err := tx.Exec(`
+			ALTER TABLE local_configurations
+			ADD COLUMN article TEXT
+		`).Error; err != nil {
+			return fmt.Errorf("add local_configurations.article: %w", err)
+		}
+		slog.Info("added article to local_configurations")
+	}
+	return nil
+}
+
+func addLocalConfigurationServerModel(tx *gorm.DB) error {
+	type columnInfo struct {
+		Name string `gorm:"column:name"`
+	}
+	var columns []columnInfo
+	if err := tx.Raw(`
+		SELECT name FROM pragma_table_info('local_configurations')
+		WHERE name IN ('server_model')
+	`).Scan(&columns).Error; err != nil {
+		return fmt.Errorf("check local_configurations(server_model) existence: %w", err)
+	}
+	if len(columns) == 0 {
+		if err := tx.Exec(`
+			ALTER TABLE local_configurations
+			ADD COLUMN server_model TEXT
+		`).Error; err != nil {
+			return fmt.Errorf("add local_configurations.server_model: %w", err)
+		}
+		slog.Info("added server_model to local_configurations")
+	}
+	return nil
+}
+
+func addLocalConfigurationSupportCode(tx *gorm.DB) error {
+	type columnInfo struct {
+		Name string `gorm:"column:name"`
+	}
+	var columns []columnInfo
+	if err := tx.Raw(`
+		SELECT name FROM pragma_table_info('local_configurations')
+		WHERE name IN ('support_code')
+	`).Scan(&columns).Error; err != nil {
+		return fmt.Errorf("check local_configurations(support_code) existence: %w", err)
+	}
+	if len(columns) == 0 {
+		if err := tx.Exec(`
+			ALTER TABLE local_configurations
+			ADD COLUMN support_code TEXT
+		`).Error; err != nil {
+			return fmt.Errorf("add local_configurations.support_code: %w", err)
+		}
+		slog.Info("added support_code to local_configurations")
+	}
+	return nil
+}

internal/localdb/models.go

@@ -96,6 +96,9 @@ type LocalConfiguration struct {
 	Notes            string                      `json:"notes"`
 	IsTemplate       bool                        `gorm:"default:false" json:"is_template"`
 	ServerCount      int                         `gorm:"default:1" json:"server_count"`
+	ServerModel      string                      `gorm:"size:100" json:"server_model,omitempty"`
+	SupportCode      string                      `gorm:"size:20" json:"support_code,omitempty"`
+	Article          string                      `gorm:"size:80" json:"article,omitempty"`
 	PricelistID           *uint                       `gorm:"index" json:"pricelist_id,omitempty"`
 	WarehousePricelistID  *uint                       `gorm:"index" json:"warehouse_pricelist_id,omitempty"`
 	CompetitorPricelistID *uint                       `gorm:"index" json:"competitor_pricelist_id,omitempty"`
@@ -172,6 +175,7 @@ type LocalPricelistItem struct {
 	ID           uint            `gorm:"primaryKey;autoIncrement" json:"id"`
 	PricelistID  uint            `gorm:"not null;index" json:"pricelist_id"`
 	LotName      string          `gorm:"not null" json:"lot_name"`
+	LotCategory  string          `gorm:"column:lot_category" json:"lot_category,omitempty"`
 	Price        float64         `gorm:"not null" json:"price"`
 	AvailableQty *float64        `json:"available_qty,omitempty"`
 	Partnumbers  LocalStringList `gorm:"type:text" json:"partnumbers,omitempty"`

internal/localdb/snapshots.go

@@ -22,6 +22,9 @@ func BuildConfigurationSnapshot(localCfg *LocalConfiguration) (string, error) {
 		"notes":              localCfg.Notes,
 		"is_template":        localCfg.IsTemplate,
 		"server_count":       localCfg.ServerCount,
+		"server_model":       localCfg.ServerModel,
+		"support_code":       localCfg.SupportCode,
+		"article":            localCfg.Article,
 		"pricelist_id":       localCfg.PricelistID,
 		"only_in_stock":      localCfg.OnlyInStock,
 		"price_updated_at":   localCfg.PriceUpdatedAt,
@@ -52,6 +55,9 @@ func DecodeConfigurationSnapshot(data string) (*LocalConfiguration, error) {
 		Notes            string           `json:"notes"`
 		IsTemplate       bool             `json:"is_template"`
 		ServerCount      int              `json:"server_count"`
+		ServerModel      string           `json:"server_model"`
+		SupportCode      string           `json:"support_code"`
+		Article          string           `json:"article"`
 		PricelistID      *uint            `json:"pricelist_id"`
 		OnlyInStock      bool             `json:"only_in_stock"`
 		PriceUpdatedAt   *time.Time       `json:"price_updated_at"`
@@ -78,6 +84,9 @@ func DecodeConfigurationSnapshot(data string) (*LocalConfiguration, error) {
 		Notes:            snapshot.Notes,
 		IsTemplate:       snapshot.IsTemplate,
 		ServerCount:      snapshot.ServerCount,
+		ServerModel:      snapshot.ServerModel,
+		SupportCode:      snapshot.SupportCode,
+		Article:          snapshot.Article,
 		PricelistID:      snapshot.PricelistID,
 		OnlyInStock:      snapshot.OnlyInStock,
 		PriceUpdatedAt:   snapshot.PriceUpdatedAt,

internal/models/configuration.go

@@ -53,6 +53,9 @@ type Configuration struct {
 	Notes                 string      `gorm:"type:text" json:"notes"`
 	IsTemplate            bool        `gorm:"default:false" json:"is_template"`
 	ServerCount           int         `gorm:"default:1" json:"server_count"`
+	ServerModel           string      `gorm:"size:100" json:"server_model,omitempty"`
+	SupportCode           string      `gorm:"size:20" json:"support_code,omitempty"`
+	Article               string      `gorm:"size:80" json:"article,omitempty"`
 	PricelistID           *uint       `gorm:"index" json:"pricelist_id,omitempty"`
 	WarehousePricelistID  *uint       `gorm:"index" json:"warehouse_pricelist_id,omitempty"`
 	CompetitorPricelistID *uint       `gorm:"index" json:"competitor_pricelist_id,omitempty"`

internal/models/pricelist.go

@@ -55,6 +55,7 @@ type PricelistItem struct {
 	ID          uint    `gorm:"primaryKey" json:"id"`
 	PricelistID uint    `gorm:"not null;index:idx_pricelist_lot" json:"pricelist_id"`
 	LotName     string  `gorm:"size:255;not null;index:idx_pricelist_lot" json:"lot_name"`
+	LotCategory string  `gorm:"column:lot_category;size:50" json:"lot_category,omitempty"`
 	Price       float64 `gorm:"type:decimal(12,2);not null" json:"price"`
 	PriceMethod string  `gorm:"size:20" json:"price_method"`
 

internal/repository/pricelist.go

@@ -238,11 +238,7 @@ func (r *PricelistRepository) GetItems(pricelistID uint, offset, limit int, sear
 		if err := r.db.Where("lot_name = ?", items[i].LotName).First(&lot).Error; err == nil {
 			items[i].LotDescription = lot.LotDescription
 		}
-		// Parse category from lot_name (e.g., "CPU_AMD_9654" -> "CPU")
+		items[i].Category = strings.TrimSpace(items[i].LotCategory)
-		parts := strings.SplitN(items[i].LotName, "_", 2)
-		if len(parts) >= 1 {
-			items[i].Category = parts[0]
-		}
 	}
 
 	if err := r.enrichItemsWithStock(items); err != nil {

internal/services/configuration.go

@@ -52,10 +52,20 @@ type CreateConfigRequest struct {
 	Notes       string             `json:"notes"`
 	IsTemplate  bool               `json:"is_template"`
 	ServerCount int                `json:"server_count"`
+	ServerModel string             `json:"server_model,omitempty"`
+	SupportCode string             `json:"support_code,omitempty"`
+	Article     string             `json:"article,omitempty"`
 	PricelistID *uint              `json:"pricelist_id,omitempty"`
 	OnlyInStock bool               `json:"only_in_stock"`
 }
 
+type ArticlePreviewRequest struct {
+	Items       models.ConfigItems `json:"items"`
+	ServerModel string             `json:"server_model"`
+	SupportCode string             `json:"support_code,omitempty"`
+	PricelistID *uint              `json:"pricelist_id,omitempty"`
+}
+
 func (s *ConfigurationService) Create(ownerUsername string, req *CreateConfigRequest) (*models.Configuration, error) {
 	projectUUID, err := s.resolveProjectUUID(ownerUsername, req.ProjectUUID)
 	if err != nil {
@@ -84,6 +94,9 @@ func (s *ConfigurationService) Create(ownerUsername string, req *CreateConfigReq
 		Notes:         req.Notes,
 		IsTemplate:    req.IsTemplate,
 		ServerCount:   req.ServerCount,
+		ServerModel:   req.ServerModel,
+		SupportCode:   req.SupportCode,
+		Article:       req.Article,
 		PricelistID:   pricelistID,
 		OnlyInStock:   req.OnlyInStock,
 	}
@@ -146,6 +159,9 @@ func (s *ConfigurationService) Update(uuid string, ownerUsername string, req *Cr
 	config.Notes = req.Notes
 	config.IsTemplate = req.IsTemplate
 	config.ServerCount = req.ServerCount
+	config.ServerModel = req.ServerModel
+	config.SupportCode = req.SupportCode
+	config.Article = req.Article
 	config.PricelistID = pricelistID
 	config.OnlyInStock = req.OnlyInStock
 

internal/services/export.go

@@ -27,6 +27,7 @@ func NewExportService(cfg config.ExportConfig, categoryRepo *repository.Category
 
 type ExportData struct {
 	Name      string
+	Article   string
 	Items     []ExportItem
 	Total     float64
 	Notes     string
@@ -109,7 +110,7 @@ func (s *ExportService) ToCSV(w io.Writer, data *ExportData) error {
 
 	// Total row
 	totalStr := strings.ReplaceAll(fmt.Sprintf("%.2f", data.Total), ".", ",")
-	if err := csvWriter.Write([]string{"", "", "", "", "ИТОГО:", totalStr}); err != nil {
+	if err := csvWriter.Write([]string{data.Article, "", "", "", "ИТОГО:", totalStr}); err != nil {
 		return fmt.Errorf("failed to write total row: %w", err)
 	}
 
@@ -162,6 +163,7 @@ func (s *ExportService) ConfigToExportData(config *models.Configuration, compone
 
 	return &ExportData{
 		Name:      config.Name,
+		Article:   "",
 		Items:     items,
 		Total:     total,
 		Notes:     config.Notes,

internal/services/local_configuration.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"git.mchus.pro/mchus/quoteforge/internal/appmeta"
+	"git.mchus.pro/mchus/quoteforge/internal/article"
 	"git.mchus.pro/mchus/quoteforge/internal/localdb"
 	"git.mchus.pro/mchus/quoteforge/internal/models"
 	"git.mchus.pro/mchus/quoteforge/internal/services/sync"
@@ -64,6 +65,18 @@ func (s *LocalConfigurationService) Create(ownerUsername string, req *CreateConf
 		return nil, err
 	}
 
+	if strings.TrimSpace(req.ServerModel) != "" {
+		articleResult, articleErr := article.Build(s.localDB, req.Items, article.BuildOptions{
+			ServerModel:     req.ServerModel,
+			SupportCode:     req.SupportCode,
+			ServerPricelist: pricelistID,
+		})
+		if articleErr != nil {
+			return nil, articleErr
+		}
+		req.Article = articleResult.Article
+	}
+
 	total := req.Items.Total()
 	if req.ServerCount > 1 {
 		total *= float64(req.ServerCount)
@@ -80,6 +93,9 @@ func (s *LocalConfigurationService) Create(ownerUsername string, req *CreateConf
 		Notes:         req.Notes,
 		IsTemplate:    req.IsTemplate,
 		ServerCount:   req.ServerCount,
+		ServerModel:   req.ServerModel,
+		SupportCode:   req.SupportCode,
+		Article:       req.Article,
 		PricelistID:   pricelistID,
 		OnlyInStock:   req.OnlyInStock,
 		CreatedAt:     time.Now(),
@@ -142,6 +158,18 @@ func (s *LocalConfigurationService) Update(uuid string, ownerUsername string, re
 		return nil, err
 	}
 
+	if strings.TrimSpace(req.ServerModel) != "" {
+		articleResult, articleErr := article.Build(s.localDB, req.Items, article.BuildOptions{
+			ServerModel:     req.ServerModel,
+			SupportCode:     req.SupportCode,
+			ServerPricelist: pricelistID,
+		})
+		if articleErr != nil {
+			return nil, articleErr
+		}
+		req.Article = articleResult.Article
+	}
+
 	total := req.Items.Total()
 	if req.ServerCount > 1 {
 		total *= float64(req.ServerCount)
@@ -163,6 +191,9 @@ func (s *LocalConfigurationService) Update(uuid string, ownerUsername string, re
 	localCfg.Notes = req.Notes
 	localCfg.IsTemplate = req.IsTemplate
 	localCfg.ServerCount = req.ServerCount
+	localCfg.ServerModel = req.ServerModel
+	localCfg.SupportCode = req.SupportCode
+	localCfg.Article = req.Article
 	localCfg.PricelistID = pricelistID
 	localCfg.OnlyInStock = req.OnlyInStock
 	localCfg.UpdatedAt = time.Now()
@@ -176,6 +207,19 @@ func (s *LocalConfigurationService) Update(uuid string, ownerUsername string, re
 	return cfg, nil
 }
 
+// BuildArticlePreview generates server article based on current items and server_model/support_code.
+func (s *LocalConfigurationService) BuildArticlePreview(req *ArticlePreviewRequest) (article.BuildResult, error) {
+	pricelistID, err := s.resolvePricelistID(req.PricelistID)
+	if err != nil {
+		return article.BuildResult{}, err
+	}
+	return article.Build(s.localDB, req.Items, article.BuildOptions{
+		ServerModel:     req.ServerModel,
+		SupportCode:     req.SupportCode,
+		ServerPricelist: pricelistID,
+	})
+}
+
 // Delete deletes a configuration from local SQLite and queues it for sync
 func (s *LocalConfigurationService) Delete(uuid string, ownerUsername string) error {
 	localCfg, err := s.localDB.GetConfigurationByUUID(uuid)
@@ -269,6 +313,9 @@ func (s *LocalConfigurationService) CloneToProject(configUUID string, ownerUsern
 		Notes:         original.Notes,
 		IsTemplate:    false,
 		ServerCount:   original.ServerCount,
+		ServerModel:   original.ServerModel,
+		SupportCode:   original.SupportCode,
+		Article:       original.Article,
 		PricelistID:   original.PricelistID,
 		OnlyInStock:   original.OnlyInStock,
 		CreatedAt:     time.Now(),
@@ -424,6 +471,18 @@ func (s *LocalConfigurationService) UpdateNoAuth(uuid string, req *CreateConfigR
 		return nil, err
 	}
 
+	if strings.TrimSpace(req.ServerModel) != "" {
+		articleResult, articleErr := article.Build(s.localDB, req.Items, article.BuildOptions{
+			ServerModel:     req.ServerModel,
+			SupportCode:     req.SupportCode,
+			ServerPricelist: pricelistID,
+		})
+		if articleErr != nil {
+			return nil, articleErr
+		}
+		req.Article = articleResult.Article
+	}
+
 	total := req.Items.Total()
 	if req.ServerCount > 1 {
 		total *= float64(req.ServerCount)
@@ -444,6 +503,9 @@ func (s *LocalConfigurationService) UpdateNoAuth(uuid string, req *CreateConfigR
 	localCfg.Notes = req.Notes
 	localCfg.IsTemplate = req.IsTemplate
 	localCfg.ServerCount = req.ServerCount
+	localCfg.ServerModel = req.ServerModel
+	localCfg.SupportCode = req.SupportCode
+	localCfg.Article = req.Article
 	localCfg.PricelistID = pricelistID
 	localCfg.OnlyInStock = req.OnlyInStock
 	localCfg.UpdatedAt = time.Now()

internal/services/sync/service.go

@@ -388,6 +388,9 @@ func (s *Service) SyncPricelists() (int, error) {
 		slog.Info("deleted stale local pricelists", "deleted", removed)
 	}
 
+	// Backfill lot_category for used pricelists (older local caches may miss the column values).
+	s.backfillUsedPricelistItemCategories(pricelistRepo, serverPricelistIDs)
+
 	// Update last sync time
 	s.localDB.SetLastSyncTime(time.Now())
 	s.RecordSyncHeartbeat()
@@ -396,6 +399,83 @@ func (s *Service) SyncPricelists() (int, error) {
 	return synced, nil
 }
 
+func (s *Service) backfillUsedPricelistItemCategories(pricelistRepo *repository.PricelistRepository, activeServerPricelistIDs []uint) {
+	if s.localDB == nil || pricelistRepo == nil {
+		return
+	}
+
+	activeSet := make(map[uint]struct{}, len(activeServerPricelistIDs))
+	for _, id := range activeServerPricelistIDs {
+		activeSet[id] = struct{}{}
+	}
+
+	type row struct {
+		ID uint `gorm:"column:id"`
+	}
+	var usedRows []row
+	if err := s.localDB.DB().Raw(`
+		SELECT DISTINCT pricelist_id AS id
+		FROM local_configurations
+		WHERE is_active = 1 AND pricelist_id IS NOT NULL
+		UNION
+		SELECT DISTINCT warehouse_pricelist_id AS id
+		FROM local_configurations
+		WHERE is_active = 1 AND warehouse_pricelist_id IS NOT NULL
+		UNION
+		SELECT DISTINCT competitor_pricelist_id AS id
+		FROM local_configurations
+		WHERE is_active = 1 AND competitor_pricelist_id IS NOT NULL
+	`).Scan(&usedRows).Error; err != nil {
+		slog.Warn("pricelist category backfill: failed to list used pricelists", "error", err)
+		return
+	}
+
+	for _, r := range usedRows {
+		serverID := r.ID
+		if serverID == 0 {
+			continue
+		}
+		if _, ok := activeSet[serverID]; !ok {
+			// Not present on server (or not active) - cannot backfill from remote.
+			continue
+		}
+
+		localPL, err := s.localDB.GetLocalPricelistByServerID(serverID)
+		if err != nil || localPL == nil {
+			continue
+		}
+
+		if s.localDB.CountLocalPricelistItems(localPL.ID) == 0 {
+			continue
+		}
+
+		missing, err := s.localDB.CountLocalPricelistItemsWithEmptyCategory(localPL.ID)
+		if err != nil {
+			slog.Warn("pricelist category backfill: failed to check local items", "server_id", serverID, "error", err)
+			continue
+		}
+		if missing == 0 {
+			continue
+		}
+
+		serverItems, _, err := pricelistRepo.GetItems(serverID, 0, 10000, "")
+		if err != nil {
+			slog.Warn("pricelist category backfill: failed to load server items", "server_id", serverID, "error", err)
+			continue
+		}
+		localItems := make([]localdb.LocalPricelistItem, len(serverItems))
+		for i := range serverItems {
+			localItems[i] = *localdb.PricelistItemToLocal(&serverItems[i], localPL.ID)
+		}
+
+		if err := s.localDB.ReplaceLocalPricelistItems(localPL.ID, localItems); err != nil {
+			slog.Warn("pricelist category backfill: failed to replace local items", "server_id", serverID, "error", err)
+			continue
+		}
+		slog.Info("pricelist category backfill: refreshed local items", "server_id", serverID, "items", len(localItems))
+	}
+}
+
 // RecordSyncHeartbeat updates shared sync heartbeat for current DB user.
 // Only users with write rights are expected to be able to update this table.
 func (s *Service) RecordSyncHeartbeat() {
@@ -595,15 +675,7 @@ func (s *Service) SyncPricelistItems(localPricelistID uint) (int, error) {
 	// Convert and save locally
 	localItems := make([]localdb.LocalPricelistItem, len(serverItems))
 	for i, item := range serverItems {
-		partnumbers := make(localdb.LocalStringList, 0, len(item.Partnumbers))
+		localItems[i] = *localdb.PricelistItemToLocal(&item, localPricelistID)
-		partnumbers = append(partnumbers, item.Partnumbers...)
-		localItems[i] = localdb.LocalPricelistItem{
-			PricelistID:  localPricelistID,
-			LotName:      item.LotName,
-			Price:        item.Price,
-			AvailableQty: item.AvailableQty,
-			Partnumbers:  partnumbers,
-		}
 	}
 
 	if err := s.localDB.SaveLocalPricelistItems(localItems); err != nil {

internal/services/sync/service_pricelist_category_backfill_test.go

@@ -0,0 +1,107 @@
+package sync_test
+
+import (
+	"testing"
+	"time"
+
+	"git.mchus.pro/mchus/quoteforge/internal/localdb"
+	"git.mchus.pro/mchus/quoteforge/internal/models"
+	syncsvc "git.mchus.pro/mchus/quoteforge/internal/services/sync"
+)
+
+func TestSyncPricelists_BackfillsLotCategoryForUsedPricelistItems(t *testing.T) {
+	local := newLocalDBForSyncTest(t)
+	serverDB := newServerDBForSyncTest(t)
+
+	if err := serverDB.AutoMigrate(
+		&models.Pricelist{},
+		&models.PricelistItem{},
+		&models.Lot{},
+		&models.LotPartnumber{},
+		&models.StockLog{},
+	); err != nil {
+		t.Fatalf("migrate server tables: %v", err)
+	}
+
+	serverPL := models.Pricelist{
+		Source:       "estimate",
+		Version:      "2026-02-11-001",
+		Notification: "server",
+		CreatedBy:    "tester",
+		IsActive:     true,
+		CreatedAt:    time.Now().Add(-1 * time.Hour),
+	}
+	if err := serverDB.Create(&serverPL).Error; err != nil {
+		t.Fatalf("create server pricelist: %v", err)
+	}
+	if err := serverDB.Create(&models.PricelistItem{
+		PricelistID:  serverPL.ID,
+		LotName:      "CPU_A",
+		LotCategory:  "CPU",
+		Price:        10,
+		PriceMethod:  "",
+		MetaPrices:   "",
+		ManualPrice:  nil,
+		AvailableQty: nil,
+	}).Error; err != nil {
+		t.Fatalf("create server pricelist item: %v", err)
+	}
+
+	if err := local.SaveLocalPricelist(&localdb.LocalPricelist{
+		ServerID:  serverPL.ID,
+		Source:    serverPL.Source,
+		Version:   serverPL.Version,
+		Name:      serverPL.Notification,
+		CreatedAt: serverPL.CreatedAt,
+		SyncedAt:  time.Now(),
+		IsUsed:    false,
+	}); err != nil {
+		t.Fatalf("seed local pricelist: %v", err)
+	}
+	localPL, err := local.GetLocalPricelistByServerID(serverPL.ID)
+	if err != nil {
+		t.Fatalf("get local pricelist: %v", err)
+	}
+
+	if err := local.SaveLocalPricelistItems([]localdb.LocalPricelistItem{
+		{
+			PricelistID: localPL.ID,
+			LotName:     "CPU_A",
+			LotCategory: "",
+			Price:       10,
+		},
+	}); err != nil {
+		t.Fatalf("seed local pricelist items: %v", err)
+	}
+
+	if err := local.SaveConfiguration(&localdb.LocalConfiguration{
+		UUID:             "cfg-1",
+		OriginalUsername: "tester",
+		Name:             "cfg",
+		Items:            localdb.LocalConfigItems{{LotName: "CPU_A", Quantity: 1, UnitPrice: 10}},
+		IsActive:         true,
+		PricelistID:      &serverPL.ID,
+		SyncStatus:       "synced",
+		CreatedAt:        time.Now().Add(-30 * time.Minute),
+		UpdatedAt:        time.Now().Add(-30 * time.Minute),
+	}); err != nil {
+		t.Fatalf("seed local configuration with pricelist ref: %v", err)
+	}
+
+	svc := syncsvc.NewServiceWithDB(serverDB, local)
+	if _, err := svc.SyncPricelists(); err != nil {
+		t.Fatalf("sync pricelists: %v", err)
+	}
+
+	items, err := local.GetLocalPricelistItems(localPL.ID)
+	if err != nil {
+		t.Fatalf("load local items: %v", err)
+	}
+	if len(items) != 1 {
+		t.Fatalf("expected 1 local item, got %d", len(items))
+	}
+	if items[0].LotCategory != "CPU" {
+		t.Fatalf("expected lot_category backfilled to CPU, got %q", items[0].LotCategory)
+	}
+}
+

internal/services/sync/service_projects_push_test.go

@@ -348,6 +348,9 @@ CREATE TABLE qt_configurations (
 	notes TEXT NULL,
 	is_template INTEGER NOT NULL DEFAULT 0,
 	server_count INTEGER NOT NULL DEFAULT 1,
+	server_model TEXT NULL,
+	support_code TEXT NULL,
+	article TEXT NULL,
 	pricelist_id INTEGER NULL,
 	warehouse_pricelist_id INTEGER NULL,
 	competitor_pricelist_id INTEGER NULL,

memory.md

@@ -0,0 +1,38 @@
+# Changes summary (2026-02-11)
+
+Implemented strict `lot_category` flow using `pricelist_items.lot_category` only (no parsing from `lot_name`), plus local caching and backfill:
+
+1. Local DB schema + migrations
+- Added `lot_category` column to `local_pricelist_items` via `LocalPricelistItem` model.
+- Added local migration `2026_02_11_local_pricelist_item_category` to add the column if missing and create indexes:
+  - `idx_local_pricelist_items_pricelist_lot (pricelist_id, lot_name)`
+  - `idx_local_pricelist_items_lot_category (lot_category)`
+
+2. Server model/repository
+- Added `LotCategory` field to `models.PricelistItem`.
+- `PricelistRepository.GetItems` now sets `Category` from `LotCategory` (no parsing from `lot_name`).
+
+3. Sync + local DB helpers
+- `SyncPricelistItems` now saves `lot_category` into local cache via `PricelistItemToLocal`.
+- Added `LocalDB.CountLocalPricelistItemsWithEmptyCategory` and `LocalDB.ReplaceLocalPricelistItems`.
+- Added `LocalDB.GetLocalLotCategoriesByServerPricelistID` for strict category lookup.
+- Added `SyncPricelists` backfill step: for used active pricelists with empty categories, force refresh items from server.
+
+4. API handler
+- `GET /api/pricelists/:id/items` returns `category` from `local_pricelist_items.lot_category` (no parsing from `lot_name`).
+
+5. Article category foundation
+- New package `internal/article`:
+  - `ResolveLotCategoriesStrict` pulls categories from local pricelist items and errors on missing category.
+  - `GroupForLotCategory` maps only allowed codes (CPU/MEM/GPU/M2/SSD/HDD/EDSFF/HHHL/NIC/HCA/DPU/PSU/PS) to article groups; excludes `SFP`.
+  - Error type `MissingCategoryForLotError` with base `ErrMissingCategoryForLot`.
+
+6. Tests
+- Added unit tests for converters and article category resolver.
+- Added handler test to ensure `/api/pricelists/:id/items` returns `lot_category`.
+- Added sync test for category backfill on used pricelist items.
+- `go test ./...` passed.
+
+Additional fixes (2026-02-11):
+- Fixed article parsing bug: CPU/GPU parsers were swapped in `internal/article/generator.go`. CPU now uses last token from CPU lot; GPU uses model+memory from `GPU_vendor_model_mem_iface`.
+- Adjusted configurator base tab layout to align labels on the same row (separate label row + input row grid).

migrations/022_add_article_to_configurations.sql

@@ -0,0 +1,2 @@
+ALTER TABLE qt_configurations
+    ADD COLUMN IF NOT EXISTS article VARCHAR(80) NULL AFTER server_count;

migrations/023_add_server_model_to_configurations.sql

@@ -0,0 +1,2 @@
+ALTER TABLE qt_configurations
+    ADD COLUMN IF NOT EXISTS server_model VARCHAR(100) NULL AFTER server_count;

migrations/024_add_support_code_to_configurations.sql

@@ -0,0 +1,2 @@
+ALTER TABLE qt_configurations
+    ADD COLUMN IF NOT EXISTS support_code VARCHAR(20) NULL AFTER server_model;

pricelists_window.md

@@ -0,0 +1,315 @@
+# Промпт для ИИ: Перенос паттерна Прайслист
+
+Используй этот документ как промпт для ИИ при переносе реализации прайслиста в другой проект.
+
+---
+
+## Задача
+
+Я имею рабочую реализацию окна "Прайслист" в проекте QuoteForge. Нужно перенести эту реализацию в проект [ДОП_ПРОЕКТ_НАЗВАНИЕ], сохраняя структуру, логику и UI/UX.
+
+## Что перенести
+
+### Frontend - Лист прайслистов (`/pricelists`)
+
+**Файл источник:** QuoteForge/web/templates/pricelists.html
+
+**Компоненты:**
+1. **Таблица** - список прайслистов с колонками:
+   - Версия (монофонт)
+   - Тип (estimate/warehouse/competitor)
+   - Дата создания
+   - Автор (обычно "sync")
+   - Позиций (количество товаров)
+   - Исп. (использований)
+   - Статус (зеленый "Активен" / серый "Неактивен")
+   - Действия (Просмотр, Удалить если не используется)
+
+2. **Пагинация** - навигация по страницам с активной страницей выделена
+
+3. **Модальное окно** - "Создать прайслист" (если есть прав на запись)
+
+**Что копировать:**
+- HTML структуру таблицы из lines 10-30
+- JavaScript функции:
+  - `loadPricelists(page)` - загрузка списка
+  - `renderPricelists(items)` - рендер таблицы
+  - `renderPagination(total, page, perPage)` - пагинация
+  - `checkPricelistWritePermission()` - проверка прав
+  - Модальные функции: `openCreateModal()`, `closeCreateModal()`, `createPricelist()`
+- CSS классы Tailwind (скопируются как есть)
+
+**Где использовать в дочернем проекте:**
+- URL: `/pricelists` (или адаптировать под ваши маршруты)
+- API: `GET /api/pricelists?page=1&per_page=20`
+
+---
+
+### Frontend - Детали прайслиста (`/pricelists/:id`)
+
+**Файл источник:** QuoteForge/web/templates/pricelist_detail.html
+
+**Компоненты:**
+1. **Хлебная крошка** - кнопка назад на список
+
+2. **Инфо-панель** - сводка по прайслисту:
+   - Версия (монофонт)
+   - Дата создания
+   - Автор
+   - Позиций (количество)
+   - Использований (в скольких конфигах)
+   - Статус (зеленый/серый)
+   - Истекает (дата или "-")
+
+3. **Таблица товаров** - с поиском и пагинацией:
+   - Артикул (монофонт, lot_name)
+   - Категория (извлекается первая часть до "_")
+   - Описание (обрезается до 60 символов с "...")
+   - [УСЛОВНО] Доступно (qty) - только для warehouse источника
+   - [УСЛОВНО] Partnumbers - только для warehouse источника
+   - Цена, $ (с 2 знаками после запятой)
+   - Настройки (аббревиатуры: РУЧН, Сред, Взвеш.мед, периоды (1н, 1м, 3м, 1г), коэффициент, МЕТА)
+
+4. **Поиск** - дебаунс 300мс, поиск по lot_name
+
+5. **Динамические колонки** - qty и partnumbers скрываются/показываются в зависимости от source (warehouse или нет)
+
+**Что копировать:**
+- HTML структуру из lines 4-78
+- JavaScript функции:
+  - `loadPricelistInfo()` - загрузка деталей прайслиста
+  - `loadItems(page)` - загрузка товаров
+  - `renderItems(items)` - рендер таблицы товаров
+  - `renderItemsPagination(total, page, perPage)` - пагинация товаров
+  - `isWarehouseSource()` - проверка источника
+  - `toggleWarehouseColumns()` - показать/скрыть conditional колонки
+  - `formatQty(qty)` - форматирование количества
+  - `formatPriceSettings(item)` - форматирование строки настроек
+  - `escapeHtml(text)` - экранирование HTML
+  - Debounce для поиска (lines 300-306)
+- CSS классы Tailwind
+- Логику conditional колонок (lines 152-164)
+
+**Где использовать в дочернем проекте:**
+- URL: `/pricelists/:id`
+- API:
+  - `GET /api/pricelists/:id`
+  - `GET /api/pricelists/:id/items?page=1&per_page=50&search=...`
+
+---
+
+### Backend - Handler
+
+**Файл источник:** QuoteForge/internal/handlers/pricelist.go
+
+**Методы для реализации:**
+
+1. **List** (lines 23-89)
+   - Параметры: `page`, `per_page`, `source` (фильтр), `active_only`
+   - Логика:
+     - Получить все прайслисты
+     - Отфильтровать по source (case-insensitive)
+     - Отсортировать по CreatedAt DESC (свежее сверху)
+     - Пагинировать
+     - Для каждого: посчитать товары (CountLocalPricelistItems), использования (IsUsed)
+     - Вернуть JSON с полями: id, source, version, created_by, item_count, usage_count, is_active, created_at, synced_from
+
+2. **Get** (lines 92-116)
+   - Параметр: `id` (uint из URL)
+   - Логика:
+     - Получить прайслист по ID
+     - Вернуть его детали (id, source, version, item_count, is_active, created_at)
+     - 404 если не найден
+
+3. **GetItems** (lines 119-181)
+   - Параметры: `id` (URL), `page`, `per_page`, `search` (query)
+   - Логика:
+     - Получить прайслист по ID
+     - Получить товары этого прайслиста
+     - Фильтровать по lot_name LIKE search (если передан)
+     - Посчитать total
+     - Пагинировать
+     - Для каждого товара: извлечь категорию из lot_name (первая часть до "_")
+     - Вернуть JSON: source, items (id, lot_name, price, category, available_qty, partnumbers), total, page, per_page
+
+4. **GetLotNames** (lines 183-211)
+   - Параметр: `id` (URL)
+   - Логика:
+     - Получить все lot_names из этого прайслиста
+     - Отсортировать alphabetically
+     - Вернуть JSON: lot_names (array of strings), total
+
+5. **GetLatest** (lines 214-233)
+   - Параметр: `source` (query, default "estimate")
+   - Логика:
+     - Нормализовать source (case-insensitive)
+     - Получить самый свежий прайслист по этому source
+     - Вернуть его детали
+     - 404 если не найден
+
+**Регистрация маршрутов:**
+```go
+pricelists := api.Group("/pricelists")
+{
+    pricelists.GET("", handler.List)
+    pricelists.GET("/latest", handler.GetLatest)
+    pricelists.GET("/:id", handler.Get)
+    pricelists.GET("/:id/items", handler.GetItems)
+    pricelists.GET("/:id/lots", handler.GetLotNames)
+}
+```
+
+---
+
+## Адаптация для другого проекта
+
+### Что нужно изменить
+
+1. **Источник данных**
+   - QuoteForge использует local DB (LocalPricelist, LocalPricelistItem)
+   - В вашем проекте: замените на ваши структуры/таблицы
+   - Сущность "прайслист" может называться по-другому
+
+2. **API маршруты**
+   - `/api/pricelists` → ваш путь
+   - `:id` - может быть UUID вместо int, адаптировать parsing
+
+3. **Имена полей**
+   - Если у вас нет поля `version` - используйте ID или дату
+   - Если нет `source` - опустить фильтр
+   - Если нет `IsUsed` - считать как всегда 0
+
+4. **Структуры данных**
+   - Pricelist должна иметь: id, name/version, created_at, source, item_count
+   - PricelistItem должна иметь: id, lot_name, price, available_qty, partnumbers
+
+5. **Условные колонки**
+   - Логика: если source == "warehouse", показать qty и partnumbers
+   - Адаптировать под ваши источники/типы
+
+### Что копировать как есть
+
+- **HTML структура** - таблицы, модали, классы Tailwind
+- **JavaScript логика** - все функции загрузки, рендера, пагинации
+- **CSS классы** - Tailwind работает везде одинаково
+- **Форматирование функций** - formatPrice, formatQty, formatDate
+
+---
+
+## Пошаговая инструкция для ИИ
+
+1. **Прочитай оба файла:**
+   - QuoteForge/web/templates/pricelists.html (список)
+   - QuoteForge/web/templates/pricelist_detail.html (детали)
+   - QuoteForge/internal/handlers/pricelist.go (backend)
+
+2. **Определи структуры данных в дочернем проекте:**
+   - Какая таблица хранит "прайслисты"?
+   - Какие у неё поля?
+   - Как связаны товары?
+
+3. **Адаптируй Backend:**
+   - Скопируй методы Handler
+   - Замени DB вызовы на вызовы вашего хранилища
+   - Замени имена полей в JSON ответах если нужно
+   - Убедись, что API возвращает нужный формат
+
+4. **Адаптируй Frontend - Список:**
+   - Скопируй HTML таблицу
+   - Скопируй функции load/render/pagination
+   - Замени маршруты `/pricelists` → ваши
+   - Замени API endpoint → ваш
+   - Протестируй список загружается
+
+5. **Адаптируй Frontend - Детали:**
+   - Скопируй HTML для деталей
+   - Скопируй функции loadInfo/loadItems/render
+   - Замени маршруты и endpoints
+   - Особое внимание на conditional колонки (toggleWarehouseColumns)
+   - Протестируй поиск работает
+
+6. **Протестируй:**
+   - Список загружается
+   - Пагинация работает
+   - Детали открываются
+   - Поиск работает
+   - Conditional колонки показываются/скрываются правильно
+   - Форматирование цен и дат работает
+
+---
+
+## Пример адаптации
+
+### Backend (было):
+```go
+func (h *PricelistHandler) List(c *gin.Context) {
+    localPLs, err := h.localDB.GetLocalPricelists()
+    // ...
+}
+```
+
+### Backend (стало):
+```go
+func (h *CatalogHandler) List(c *gin.Context) {
+    catalogs, err := h.service.GetAllCatalogs(page, perPage)
+    // ...
+}
+```
+
+### Frontend (было):
+```javascript
+const resp = await fetch(`/api/pricelists?page=${page}&per_page=20`);
+```
+
+### Frontend (стало):
+```javascript
+const resp = await fetch(`/api/catalogs?page=${page}&per_page=20`);
+```
+
+---
+
+## Качество результата
+
+Когда закончишь:
+- ✅ Список и детали выглядят идентично QuoteForge
+- ✅ Все функции работают (load, render, pagination, search, conditional columns)
+- ✅ Обработка ошибок (404, empty list, network errors)
+- ✅ Таблицы с Tailwind классами оформлены одинаково
+- ✅ Форматирование чисел/дат совпадает
+
+---
+
+## Вопросы для ИИ
+
+Перед тем как давать этот промпт, ответь на эти вопросы:
+
+1. **Какие у тебя структуры данных для "прайслиста"?**
+   - Пример: какие поля, как называется таблица
+
+2. **Какие API endpoints уже есть?**
+   - Или нужно создать с нуля?
+
+3. **Есть ли уже разница в источниках (estimate/warehouse)?**
+   - Или все одного типа?
+
+4. **Нужна ли возможность создавать прайслисты?**
+   - Или только просмотр?
+
+---
+
+## Чеклист для проверки
+
+После переноса проверь:
+
+- [ ] Backend: List возвращает правильный JSON
+- [ ] Backend: Get возвращает детали
+- [ ] Backend: GetItems возвращает товары с поиском
+- [ ] Frontend: Список загружается на `/pricelists`
+- [ ] Frontend: Клик на прайслист открывает `/pricelists/:id`
+- [ ] Frontend: Таблица на детальной странице рендеритсяся
+- [ ] Frontend: Поиск работает с дебаунсом
+- [ ] Frontend: Пагинация работает
+- [ ] Frontend: Conditional колонки показываются/скрываются
+- [ ] Frontend: Форматирование цен работает (2 знака)
+- [ ] Frontend: Форматирование дат работает (ru-RU)
+- [ ] UI: Выглядит идентично QuoteForge

releases/memory/v1.2.3.md

@@ -0,0 +1,95 @@
+# Release v1.2.3 (2026-02-10)
+
+## Summary
+
+Unified synchronization functionality with event-driven UI updates. Resolved user confusion about duplicate sync buttons by implementing a single sync source with automatic page refreshes.
+
+## Changes
+
+### Main Feature: Sync Event System
+
+- **Added `sync-completed` event** in base.html's `syncAction()` function
+  - Dispatched after successful `/api/sync/all` or `/api/sync/push`
+  - Includes endpoint and response data in event detail
+  - Enables pages to react automatically to sync completion
+
+### Configs Page (`configs.html`)
+
+- **Removed "Импорт с сервера" button** - duplicate functionality no longer needed
+- **Updated layout** - changed from 2-column grid to single button layout
+- **Removed `importConfigsFromServer()` function** - functionality now handled by navbar sync
+- **Added sync-completed event listener**:
+  - Automatically reloads configurations list after sync
+  - Resets pagination to first page
+  - New configurations appear immediately without manual refresh
+
+### Projects Page (`projects.html`)
+
+- **Wrapped initialization in DOMContentLoaded**:
+  - Moved `loadProjects()` and all event listeners inside handler
+  - Ensures DOM is fully loaded before accessing elements
+- **Added sync-completed event listener**:
+  - Automatically reloads projects list after sync
+  - New projects appear immediately without manual refresh
+
+### Pricelists Page (`pricelists.html`)
+
+- **Added sync-completed event listener** to existing DOMContentLoaded:
+  - Automatically reloads pricelists when sync completes
+  - Maintains existing permissions and modal functionality
+
+## Benefits
+
+### User Experience
+- ✅ Single "Синхронизация" button in navbar - no confusion about sync sources
+- ✅ Automatic list updates after sync - no need for manual F5 refresh
+- ✅ Consistent behavior across all pages (configs, projects, pricelists)
+- ✅ Better feedback: toast notification + automatic UI refresh
+
+### Architecture
+- ✅ Event-driven loose coupling between navbar and pages
+- ✅ Easy to extend to other pages (just add event listener)
+- ✅ No backend changes needed
+- ✅ Production-ready
+
+## Breaking Changes
+
+- **`/api/configs/import` endpoint** still works but UI button removed
+  - Users should use navbar "Синхронизация" button instead
+  - Backend API remains unchanged for backward compatibility
+
+## Files Modified
+
+1. `web/templates/base.html` - Added sync-completed event dispatch
+2. `web/templates/configs.html` - Event listener + removed duplicate UI
+3. `web/templates/projects.html` - DOMContentLoaded wrapper + event listener
+4. `web/templates/pricelists.html` - Event listener for auto-refresh
+
+**Stats:** 4 files changed, 59 insertions(+), 65 deletions(-)
+
+## Commits
+
+- `99fd80b` - feat: unify sync functionality with event-driven UI updates
+
+## Testing Checklist
+
+- [x] Configs page: New configurations appear after navbar sync
+- [x] Projects page: New projects appear after navbar sync
+- [x] Pricelists page: Pricelists refresh after navbar sync
+- [x] Both `/api/sync/all` and `/api/sync/push` trigger updates
+- [x] Toast notifications still show correctly
+- [x] Sync status indicator updates
+- [x] Error handling (423, network errors) still works
+- [x] Mode switching (Active/Archive) works correctly
+- [x] Backward compatibility maintained
+
+## Known Issues
+
+None - implementation is production-ready
+
+## Migration Notes
+
+No migration needed. Changes are frontend-only and backward compatible:
+- Old `/api/configs/import` endpoint still functional
+- No database schema changes
+- No configuration changes needed

web/templates/configs.html

@@ -249,10 +249,23 @@ function renderConfigs(configs) {
                 html += '<td class="px-4 py-3 text-sm text-gray-700">' + escapeHtml(projectName) + '</td>';
             }
         }
+        const article = c.article ? escapeHtml(c.article) : '';
+        const serverModel = c.server_model ? escapeHtml(c.server_model) : '';
+        const subtitle = article || serverModel;
         if (configStatusMode === 'archived') {
-            html += '<td class="px-4 py-3 text-sm font-medium text-gray-700">' + escapeHtml(c.name) + '</td>';
+            html += '<td class="px-4 py-3 text-sm font-medium text-gray-700">';
+            html += '<div>' + escapeHtml(c.name) + '</div>';
+            if (subtitle) {
+                html += '<div class="text-xs text-gray-500">' + subtitle + '</div>';
+            }
+            html += '</td>';
         } else {
-            html += '<td class="px-4 py-3 text-sm font-medium"><a href="/configurator?uuid=' + c.uuid + '" class="text-blue-600 hover:text-blue-800 hover:underline">' + escapeHtml(c.name) + '</a></td>';
+            html += '<td class="px-4 py-3 text-sm font-medium">';
+            html += '<a href="/configurator?uuid=' + c.uuid + '" class="text-blue-600 hover:text-blue-800 hover:underline">' + escapeHtml(c.name) + '</a>';
+            if (subtitle) {
+                html += '<div class="text-xs text-gray-500">' + subtitle + '</div>';
+            }
+            html += '</td>';
         }
         html += '<td class="px-4 py-3 text-sm text-gray-500">' + escapeHtml(author) + '</td>';
         html += '<td class="px-4 py-3 text-sm text-gray-500">' + pricePerUnit + '</td>';

web/templates/index.html

@@ -98,6 +98,7 @@
             </svg>
         </button>
         <div id="cart-summary-content" class="p-4">
+            <div id="article-display" class="text-sm text-gray-700 mb-3 font-mono"></div>
             <div id="cart-items" class="space-y-2 mb-4"></div>
             <div class="border-t pt-3 flex justify-between items-center">
                 <div class="text-lg font-bold">
@@ -334,6 +335,10 @@ let cart = [];
 let categoryOrderMap = {}; // Category code -> display_order mapping
 let autoSaveTimeout = null; // Timeout for debounced autosave
 let serverCount = 1; // Server count for the configuration
+let serverModelForQuote = '';
+let supportCode = '';
+let currentArticle = '';
+let articlePreviewTimeout = null;
 let selectedPricelistIds = {
     estimate: null,
     warehouse: null,
@@ -634,6 +639,9 @@ document.addEventListener('DOMContentLoaded', async function() {
                 category: item.category || getCategoryFromLotName(item.lot_name)
             }));
         }
+        serverModelForQuote = config.server_model || '';
+        supportCode = config.support_code || '';
+        currentArticle = config.article || '';
 
         // Restore custom price if saved
         if (config.custom_price) {
@@ -948,7 +956,32 @@ function renderTab() {
 }
 
 function renderSingleSelectTab(categories) {
-    let html = `
+    let html = '';
+    if (currentTab === 'base') {
+        html += `
+        <div class="mb-1 grid grid-cols-1 md:grid-cols-[1fr,16rem] gap-3 items-start">
+            <label for="server-model-input" class="block text-sm font-medium text-gray-700">Модель сервера для КП:</label>
+            <label for="support-code-select" class="block text-sm font-medium text-gray-700">Уровень техподдержки:</label>
+        </div>
+        <div class="mb-3 grid grid-cols-1 md:grid-cols-[1fr,16rem] gap-3 items-start">
+            <input type="text"
+                   id="server-model-input"
+                   value="${escapeHtml(serverModelForQuote)}"
+                   class="w-full px-3 py-2 border rounded focus:ring-2 focus:ring-blue-500"
+                   oninput="updateServerModelForQuote(this.value)">
+            <select id="support-code-select"
+                    class="w-full px-3 py-2 border rounded focus:ring-2 focus:ring-blue-500"
+                    onchange="updateSupportCode(this.value)">
+                <option value="">—</option>
+                <option value="1yW" ${supportCode === '1yW' ? 'selected' : ''}>1yW</option>
+                <option value="1yB" ${supportCode === '1yB' ? 'selected' : ''}>1yB</option>
+                <option value="1yS" ${supportCode === '1yS' ? 'selected' : ''}>1yS</option>
+                <option value="1yP" ${supportCode === '1yP' ? 'selected' : ''}>1yP</option>
+            </select>
+        </div>
+        `;
+    }
+    html += `
         <table class="w-full">
             <thead class="bg-gray-50">
                 <tr>
@@ -1636,6 +1669,8 @@ function updateCartUI() {
     calculateCustomPrice();
     renderSalePriceTable();
 
+    scheduleArticlePreview();
+
     if (cart.length === 0) {
         document.getElementById('cart-items').innerHTML =
             '<div class="text-gray-500 text-center py-2">Конфигурация пуста</div>';
@@ -1711,6 +1746,69 @@ function escapeHtml(text) {
     return div.innerHTML;
 }
 
+function updateServerModelForQuote(value) {
+    serverModelForQuote = value || '';
+    scheduleArticlePreview();
+}
+
+function updateSupportCode(value) {
+    supportCode = value || '';
+    scheduleArticlePreview();
+}
+
+function scheduleArticlePreview() {
+    if (articlePreviewTimeout) {
+        clearTimeout(articlePreviewTimeout);
+    }
+    articlePreviewTimeout = setTimeout(() => {
+        previewArticle();
+    }, 250);
+}
+
+async function previewArticle() {
+    const el = document.getElementById('article-display');
+    if (!el) return;
+
+    const model = serverModelForQuote.trim();
+    if (!model || !selectedPricelistIds.estimate || cart.length === 0) {
+        currentArticle = '';
+        el.textContent = 'Артикул: —';
+        return;
+    }
+
+    try {
+        const resp = await fetch('/api/configs/preview-article', {
+            method: 'POST',
+            headers: {'Content-Type': 'application/json'},
+            body: JSON.stringify({
+                server_model: serverModelForQuote,
+                support_code: supportCode,
+                pricelist_id: selectedPricelistIds.estimate,
+                items: cart.map(item => ({
+                    lot_name: item.lot_name,
+                    quantity: item.quantity,
+                    unit_price: item.unit_price || 0
+                }))
+            })
+        });
+        if (!resp.ok) {
+            currentArticle = '';
+            el.textContent = 'Артикул: —';
+            return;
+        }
+        const data = await resp.json();
+        currentArticle = data.article || '';
+        el.textContent = currentArticle ? ('Артикул: ' + currentArticle) : 'Артикул: —';
+    } catch(e) {
+        currentArticle = '';
+        el.textContent = 'Артикул: —';
+    }
+}
+
+function getCurrentArticle() {
+    return currentArticle || '';
+}
+
 function triggerAutoSave() {
     // Debounce autosave - wait 1 second after last change
     if (autoSaveTimeout) {
@@ -1751,6 +1849,9 @@ async function saveConfig(showNotification = true) {
                 custom_price: customPrice,
                 notes: '',
                 server_count: serverCountValue,
+                server_model: serverModelForQuote,
+                support_code: supportCode,
+                article: getCurrentArticle(),
                 pricelist_id: selectedPricelistIds.estimate,
                 only_in_stock: onlyInStock
             })
@@ -1795,17 +1896,19 @@ async function exportCSV() {
             ...item,
             unit_price: getDisplayPrice(item),
         }));
+        const article = getCurrentArticle();
         const resp = await fetch('/api/export/csv', {
             method: 'POST',
             headers: {'Content-Type': 'application/json'},
-            body: JSON.stringify({items: exportItems, name: configName, project_uuid: projectUUID})
+            body: JSON.stringify({items: exportItems, name: configName, project_uuid: projectUUID, article: article})
         });
 
         const blob = await resp.blob();
         const url = window.URL.createObjectURL(blob);
         const a = document.createElement('a');
         a.href = url;
-        a.download = getFilenameFromResponse(resp) || (configName || 'config') + '.csv';
+        const articleForName = article || 'BOM';
+        a.download = getFilenameFromResponse(resp) || ((configName || 'config') + ' ' + articleForName + '.csv');
         a.click();
         window.URL.revokeObjectURL(url);
     } catch(e) {