feat: вкладка Аренда — колонки Estimate/Цена продажи; lot_description для прайслистов

Вкладка «Аренда»: добавлены колонки Estimate и Цена продажи (+ итоги),
чекбокс «БУ» перенесён первым слева, таблица переведена на тот же
разметку/классы, что и таблицы вкладки «Ценообразование».

Прайслисты: local_pricelist_items получает lot_description (синхронизируется
из qt_pricelist_items.lot_description) вместо устаревших available_qty/
partnumbers, которые нигде не заполнялись.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

internal/localdb/migrations.go

@@ -129,6 +129,98 @@ var localMigrations = []localMigration{
 		name: "Add rental_enabled to local_projects",
 		run:  addLocalProjectRentalEnabled,
 	},
+	{
+		id:   "2026_07_22_pricelist_items_price_settings",
+		name: "Add lot_description and price settings columns to local_pricelist_items, drop unused available_qty/partnumbers",
+		run:  addPricelistItemDescriptionAndPriceSettings,
+	},
+}
+
+func addPricelistItemDescriptionAndPriceSettings(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_description', 'price_method', 'price_period_days', 'price_coefficient', 'manual_price', 'meta_prices', 'available_qty', 'partnumbers')
+	`).Scan(&columns).Error; err != nil {
+		return fmt.Errorf("check local_pricelist_items columns: %w", err)
+	}
+
+	have := make(map[string]bool, len(columns))
+	for _, c := range columns {
+		have[c.Name] = true
+	}
+
+	if have["lot_description"] && have["price_method"] && have["price_period_days"] &&
+		have["price_coefficient"] && have["manual_price"] && have["meta_prices"] &&
+		!have["available_qty"] && !have["partnumbers"] {
+		slog.Info("local_pricelist_items already migrated to description/price-settings schema")
+		return nil
+	}
+
+	// SQLite: recreate table without the never-populated available_qty/partnumbers
+	// columns, adding lot_description and the price settings columns synced from
+	// qt_pricelist_items (needed to render the pricelist detail UI correctly).
+	if err := tx.Exec(`
+		CREATE TABLE local_pricelist_items_new (
+			id INTEGER PRIMARY KEY AUTOINCREMENT,
+			pricelist_id INTEGER NOT NULL,
+			lot_name TEXT NOT NULL,
+			lot_category TEXT,
+			lot_description TEXT,
+			price REAL NOT NULL,
+			price_method TEXT,
+			price_period_days INTEGER DEFAULT 90,
+			price_coefficient REAL DEFAULT 0,
+			manual_price REAL,
+			meta_prices TEXT
+		)
+	`).Error; err != nil {
+		return fmt.Errorf("create new local_pricelist_items table: %w", err)
+	}
+
+	if err := tx.Exec(`
+		INSERT INTO local_pricelist_items_new (id, pricelist_id, lot_name, lot_category, price)
+		SELECT id, pricelist_id, lot_name, lot_category, price
+		FROM local_pricelist_items
+	`).Error; err != nil {
+		return fmt.Errorf("copy data to new local_pricelist_items table: %w", err)
+	}
+
+	if err := tx.Exec(`DROP TABLE local_pricelist_items`).Error; err != nil {
+		return fmt.Errorf("drop old local_pricelist_items table: %w", err)
+	}
+
+	if err := tx.Exec(`ALTER TABLE local_pricelist_items_new RENAME TO local_pricelist_items`).Error; err != nil {
+		return fmt.Errorf("rename new local_pricelist_items table: %w", err)
+	}
+
+	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("recreate idx_local_pricelist_items_pricelist_lot: %w", err)
+	}
+
+	if err := tx.Exec(`
+		CREATE UNIQUE INDEX IF NOT EXISTS idx_local_pricelist_items_pricelist_lot_unique
+		ON local_pricelist_items(pricelist_id, lot_name)
+	`).Error; err != nil {
+		return fmt.Errorf("recreate unique index on local_pricelist_items: %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("recreate idx_local_pricelist_items_lot_category: %w", err)
+	}
+
+	slog.Info("added lot_description/price settings columns to local_pricelist_items and dropped available_qty/partnumbers")
+	return nil
 }
 
 func addLocalProjectRentalEnabled(tx *gorm.DB) error {