feat(product): add show_in_list toggle and TV price formula

- New `show_in_list` column to control product visibility in customer list
- New `tv_price_formula_enabled` + `tv_price_formula` columns for separate TV pricing
- FormulaPriceService: isTvEnabled() and calculateTvForProduct()
- listTvProducts applies TV formula overrides before returning
- filterProductData handles both new field sets

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Services/FormulaPriceService.php

@@ -21,6 +21,41 @@ class FormulaPriceService
         return (bool) ($product?->price_formula_enabled);
     }
 
+    public static function isTvEnabled(?Product $product): bool
+    {
+        if (! Product::hasTvPriceFormulaColumns()) {
+            return false;
+        }
+
+        return (bool) ($product?->show_on_tv) && (bool) ($product?->tv_price_formula_enabled);
+    }
+
+    /**
+     * @param  array<string, mixed>|null  $mazanehRow
+     */
+    public static function calculateTvForProduct(Product $product, ?array $mazanehRow): ?int
+    {
+        if (! self::isTvEnabled($product) || $mazanehRow === null) {
+            return null;
+        }
+
+        if (array_key_exists('active', $mazanehRow) && $mazanehRow['active'] == false) {
+            return null;
+        }
+
+        $p = (float) ($mazanehRow['price'] ?? 0);
+        if ($p <= 0) {
+            return null;
+        }
+
+        $formula = trim((string) ($product->tv_price_formula ?? ''));
+        if ($formula === '') {
+            $formula = self::DEFAULT_FORMULA;
+        }
+
+        return self::evaluate($formula, $p, self::resolveWeight($product->amount ?? 0));
+    }
+
     /**
      * P = قیمت وسط مرجع (بدون تفاوت ارائه‌دهنده / بدون price_offset_percent)
      *