refactor lot matching into shared module

internal/handlers/pricing.go

@@ -14,6 +14,7 @@ import (
 	"git.mchus.pro/mchus/quoteforge/internal/services"
 	"git.mchus.pro/mchus/quoteforge/internal/services/alerts"
 	"git.mchus.pro/mchus/quoteforge/internal/services/pricing"
+	"git.mchus.pro/mchus/quoteforge/internal/warehouse"
 	"github.com/gin-gonic/gin"
 	"gorm.io/gorm"
 )
@@ -1296,41 +1297,11 @@ func (h *PricingHandler) ListLotsTable(c *gin.Context) {
 		estimateMap[ec.Lot] = ec.Count
 	}
 
-	type stockRow struct {
-		LotName string   `gorm:"column:lot_name"`
-		Qty     *float64 `gorm:"column:total_qty"`
-	}
-	var stockRows []stockRow
-	if err := h.db.Raw(`
-		SELECT lp.lot_name, SUM(sl.qty) as total_qty
-		FROM stock_log sl
-		INNER JOIN lot_partnumbers lp ON LOWER(TRIM(lp.partnumber)) = LOWER(TRIM(sl.partnumber))
-		INNER JOIN (SELECT MAX(date) as max_date FROM stock_log) md ON sl.date = md.max_date
-		WHERE lp.lot_name IN ?
-		GROUP BY lp.lot_name
-	`, lotNames).Scan(&stockRows).Error; err != nil {
+	stockQtyByLot, pnMap, err := warehouse.LoadLotMetrics(h.db, lotNames, true)
+	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 		return
 	}
-	stockMap := make(map[string]*float64, len(stockRows))
-	for _, sr := range stockRows {
-		qty := sr.Qty
-		stockMap[sr.LotName] = qty
-	}
-
-	type pnRow struct {
-		LotName    string `gorm:"column:lot_name"`
-		Partnumber string `gorm:"column:partnumber"`
-	}
-	var pnRows []pnRow
-	if err := h.db.Raw("SELECT lot_name, partnumber FROM lot_partnumbers WHERE lot_name IN ? ORDER BY lot_name, partnumber", lotNames).Scan(&pnRows).Error; err != nil {
-		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
-		return
-	}
-	pnMap := make(map[string][]string, len(pnRows))
-	for _, pn := range pnRows {
-		pnMap[pn.LotName] = append(pnMap[pn.LotName], pn.Partnumber)
-	}
 
 	result := make([]LotTableRow, len(rows))
 	for i, r := range rows {
@@ -1349,7 +1320,10 @@ func (h *PricingHandler) ListLotsTable(c *gin.Context) {
 			Partnumbers:    pnMap[r.LotName],
 			Popularity:     pop,
 			EstimateCount:  estimateMap[r.LotName],
-			StockQty:       stockMap[r.LotName],
+		}
+		if qty, ok := stockQtyByLot[r.LotName]; ok {
+			q := qty
+			result[i].StockQty = &q
 		}
 		if result[i].Partnumbers == nil {
 			result[i].Partnumbers = []string{}