feat: shayegan inbound charges workflow and copper kilogram unit enforcement

app/Services/AssetSummaryService.php

@@ -717,6 +717,8 @@ class AssetSummaryService
             $meltedWeight = round(Controller::gramsToTradeUnit($meltedGrams), 3);
             $totalWeight = round($productWeight + $meltedWeight, 3);
 
+            $metalUnit = ((int) $metalId === 3 || $weightUnit === 'کیلوگرم') ? 'کیلوگرم' : $weightUnit;
+
             $totals[] = [
                 'metal_id' => (int) $metalId,
                 'metal_label' => self::METAL_LABELS[$metalId] ?? 'فلز',
@@ -724,7 +726,7 @@ class AssetSummaryService
                 'product_weight' => $productWeight,
                 'melted_weight' => $meltedWeight,
                 'total_weight' => $totalWeight,
-                'unit' => $weightUnit,
+                'unit' => $metalUnit,
             ];
         }