feat: enhance subscription management with discount calculations and update support messages

keyboards/client.py

@@ -7,13 +7,14 @@ from schemas.subscriptions import SubscriptionDuration
 
 main_menu = InlineKeyboardBuilder(
     [
+        [InlineKeyboardButton(text="📊 Подписка", callback_data="sub_info")],
         [
             InlineKeyboardButton(text="⚙️ Купить", callback_data="buy"),
-            InlineKeyboardButton(text="FAQ", callback_data="faq"),
+            InlineKeyboardButton(text="⁉️ FAQ", callback_data="faq"),
         ],
         [
-            InlineKeyboardButton(text="Наш Канал", url="https://goo.gle"),
-            InlineKeyboardButton(text="Тех. Поддержка", callback_data="support"),
+            InlineKeyboardButton(text="📢 Наш Канал", url="https://t.me/maleniavpn"),
+            InlineKeyboardButton(text="🎧 Тех. Поддержка", url="https://t.me/maleniasupportbot"),
         ],
         [InlineKeyboardButton(text="🔗 Обновить ссылку", callback_data="update_link")],
         [InlineKeyboardButton(text="👤 Реферальная система", callback_data="referal")],