added accounting failing handles

app/Models/Product.php

@@ -30,6 +30,7 @@ class Product extends Model
     private static ?bool $cashFeePercentModeColumnsExist = null;
     private static ?bool $physicalDeliveryColumnsExist = null;
     private static ?bool $descriptionColumnExists = null;
+    private static ?bool $karatColumnExists = null;
     private static ?bool $tvPriceFormulaColumnsExist = null;
     private static ?bool $priceFormulaColumnsExist = null;
 
@@ -73,6 +74,9 @@ class Product extends Model
             if (!static::hasDescriptionColumn()) {
                 unset($product->attributes['description']);
             }
+            if (!static::hasKaratColumn()) {
+                unset($product->attributes['karat']);
+            }
             if (!static::hasOverrideTradingHoursColumn()) {
                 unset($product->attributes['override_trading_hours']);
             }
@@ -407,6 +411,24 @@ class Product extends Model
         return static::$descriptionColumnExists;
     }
 
+    public static function hasKaratColumn(): bool
+    {
+        if (static::$karatColumnExists !== null) {
+            return static::$karatColumnExists;
+        }
+
+        try {
+            static::$karatColumnExists = Schema::hasColumn(
+                (new static)->getTable(),
+                'karat'
+            );
+        } catch (\Throwable) {
+            static::$karatColumnExists = false;
+        }
+
+        return static::$karatColumnExists;
+    }
+
     public function orderLimitsEnabled(): bool
     {
         if (!static::hasOrderLimitColumns() || !($this->order_limit_enabled ?? false)) {
@@ -510,6 +532,7 @@ class Product extends Model
         'bubble',
         'inventory',
         'description',
+        'karat',
         'direct_price',
         'app_price',            // روشن: قیمت واحد از قیمت زندهٔ اپ هر گرم × وزن محاسبه می‌شود
         'price_formula_enabled',