Add stock pricelist admin flow with mapping placeholders and warehouse details

internal/models/lot.go

@@ -37,3 +37,31 @@ type Supplier struct {
 func (Supplier) TableName() string {
 	return "supplier"
 }
+
+// StockLog stores warehouse stock snapshots imported from external files.
+type StockLog struct {
+	StockLogID uint      `gorm:"column:stock_log_id;primaryKey;autoIncrement"`
+	Lot        string    `gorm:"column:lot;size:255;not null"`
+	Supplier   *string   `gorm:"column:supplier;size:255"`
+	Date       time.Time `gorm:"column:date;type:date;not null"`
+	Price      float64   `gorm:"column:price;not null"`
+	Quality    *string   `gorm:"column:quality;size:255"`
+	Comments   *string   `gorm:"column:comments;size:15000"`
+	Vendor     *string   `gorm:"column:vendor;size:255"`
+	Qty        *float64  `gorm:"column:qty"`
+}
+
+func (StockLog) TableName() string {
+	return "stock_log"
+}
+
+// LotPartnumber maps external part numbers to internal lots.
+type LotPartnumber struct {
+	Partnumber  string  `gorm:"column:partnumber;size:255;primaryKey"`
+	LotName     string  `gorm:"column:lot_name;size:255;primaryKey"`
+	Description *string `gorm:"column:description;size:10000"`
+}
+
+func (LotPartnumber) TableName() string {
+	return "lot_partnumbers"
+}

internal/models/pricelist.go

@@ -65,8 +65,10 @@ type PricelistItem struct {
 	MetaPrices       string   `gorm:"size:1000" json:"meta_prices,omitempty"`
 
 	// Virtual fields for display
-	LotDescription string `gorm:"-" json:"lot_description,omitempty"`
-	Category       string `gorm:"-" json:"category,omitempty"`
+	LotDescription string   `gorm:"-" json:"lot_description,omitempty"`
+	Category       string   `gorm:"-" json:"category,omitempty"`
+	AvailableQty   *float64 `gorm:"-" json:"available_qty,omitempty"`
+	Partnumbers    []string `gorm:"-" json:"partnumbers,omitempty"`
 }
 
 func (PricelistItem) TableName() string {