sku and item fix

Backend/ERPCore/Services/ItemTypeService.cs

@@ -41,7 +41,7 @@ public sealed class ItemTypeService : IItemTypeService
         var total = await q.CountAsync(ct);
         var rows = await q.OrderBy(t => t.Name)
             .Skip(query.Skip).Take(query.PageSize)
-            .Select(t => new ItemTypeDto(t.ItemTypeId, t.Name, t.Status, t.CreatedAt, t.UpdatedAt))
+            .Select(t => new ItemTypeDto(t.ItemTypeId, t.Name, t.IsMeasurable, t.Status, t.CreatedAt, t.UpdatedAt))
             .ToListAsync(ct);
 
         return PagedResponse<ItemTypeDto>.Create(rows, query.Page, query.PageSize, total);
@@ -63,6 +63,7 @@ public sealed class ItemTypeService : IItemTypeService
         var itemType = new ItemType
         {
             Name = name,
+            IsMeasurable = request.IsMeasurable,
             Status = EntityStatus.Active,
             CreatedAt = DateTime.UtcNow
         };
@@ -90,6 +91,9 @@ public sealed class ItemTypeService : IItemTypeService
         // Renaming does not touch existing items: their SKUs already encode the values that
         // were chosen, and nothing joins back to this row (docs/10 Part C.9).
         itemType.Name = name;
+        // Omitted ⇒ keep what is stored. A plain bool would bind an absent property as false and
+        // so let a name-only PUT silently clear the flag on every rename.
+        itemType.IsMeasurable = request.IsMeasurable ?? itemType.IsMeasurable;
         itemType.UpdatedAt = DateTime.UtcNow;
 
         try
@@ -114,5 +118,5 @@ public sealed class ItemTypeService : IItemTypeService
         await _uow.SaveChangesAsync(ct);
     }
 
-    private static ItemTypeDto Map(ItemType t) => new(t.ItemTypeId, t.Name, t.Status, t.CreatedAt, t.UpdatedAt);
+    private static ItemTypeDto Map(ItemType t) => new(t.ItemTypeId, t.Name, t.IsMeasurable, t.Status, t.CreatedAt, t.UpdatedAt);
 }