feat: add LOT creation, auto-save mappings, disable auto warehouse pricelist

- Add LOT creation functionality in pricing admin
  - New API endpoint POST /api/admin/pricing/lots
  - Modal form for creating new LOT with auto-category detection
  - Creates entries in both lot and qt_lot_metadata tables

- Implement auto-save for stock mappings
  - Auto-save on change for partnumber → LOT mappings
  - Visual feedback (orange during save, green on success, red on error)
  - Works in both main mappings table and import suggestions

- Improve stock import suggestions UI
  - Remove "Причина" column from suggestions table
  - Increase LOT and Partnumber column widths to 33% each
  - Better visual balance in the table layout

- Disable automatic warehouse pricelist creation on stock_log import
  - Import now completes at 100% after stock_log update
  - Manual pricelist creation available via UI when needed
  - Faster import process without auto-generation overhead

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

internal/config/config.go

@@ -14,7 +14,6 @@ import (
 type Config struct {
 	Server        ServerConfig        `yaml:"server"`
 	Database      DatabaseConfig      `yaml:"database"`
-	Auth          AuthConfig          `yaml:"auth"`
 	Pricing       PricingConfig       `yaml:"pricing"`
 	Export        ExportConfig        `yaml:"export"`
 	Alerts        AlertsConfig        `yaml:"alerts"`
@@ -56,12 +55,6 @@ func (d *DatabaseConfig) DSN() string {
 	return cfg.FormatDSN()
 }
 
-type AuthConfig struct {
-	JWTSecret     string        `yaml:"jwt_secret"`
-	TokenExpiry   time.Duration `yaml:"token_expiry"`
-	RefreshExpiry time.Duration `yaml:"refresh_expiry"`
-}
-
 type PricingConfig struct {
 	DefaultMethod       string `yaml:"default_method"`
 	DefaultPeriodDays   int    `yaml:"default_period_days"`
@@ -147,13 +140,6 @@ func (c *Config) setDefaults() {
 		c.Database.ConnMaxLifetime = 5 * time.Minute
 	}
 
-	if c.Auth.TokenExpiry == 0 {
-		c.Auth.TokenExpiry = 24 * time.Hour
-	}
-	if c.Auth.RefreshExpiry == 0 {
-		c.Auth.RefreshExpiry = 7 * 24 * time.Hour
-	}
-
 	if c.Pricing.DefaultMethod == "" {
 		c.Pricing.DefaultMethod = "weighted_median"
 	}