fix(settings): read SuperAdmin overlay via ConfigService everywhere

app/Http/Controllers/Controller.php

@@ -202,15 +202,10 @@ class Controller extends BaseController
         ])->post('https://tele.ygram.ir/send-message', ["message" => $msg, "chatId" => $to, "botToken" => 'Paramisgold_bot']);
         return $response->json();
     }
+    /** @deprecated alias — همان ConfigService::get؛ overlay سوپرادمین را هم می‌خواند */
     public static function Config($name)
     {
-        $row = Setting::where('key', $name)->first();
-
-        if ($row && $row->is_active && $row->value !== null && $row->value !== '') {
-            return $row->value;
-        }
-
-        return false;
+        return app(ConfigService::class)->Config($name);
     }
 
     /** دامنهٔ عمومی سایت — فقط از درخواست HTTP فعلی */
@@ -227,12 +222,7 @@ class Controller extends BaseController
 
     protected static function metalTypeSettingValue(): ?string
     {
-        $metalType = Setting::where('key', 'metal_type')->value('value');
-        if ($metalType === null) {
-            return null;
-        }
-
-        $metalType = trim((string) $metalType);
+        $metalType = trim((string) app(ConfigService::class)->getString('metal_type'));
 
         return $metalType !== '' ? $metalType : null;
     }
@@ -495,7 +485,7 @@ class Controller extends BaseController
     public static function tradeWeightUnit(): string
     {
         return self::resolveTradeWeightUnit(
-            Setting::where('key', 'unit')->value('value')
+            app(ConfigService::class)->getString('unit')
         );
     }