Enhance TopUpModal styling and update localization files

- Updated button styles in TopUpModal for improved visual feedback during interactions.
- Adjusted modal positioning for better user experience on desktop.
- Added 'paymentMethod' key to localization files for English, Persian, Russian, and Chinese languages, enhancing multi-language support.

src/locales/en.json

@@ -254,6 +254,7 @@
     "topUp": "Top Up",
     "topUpBalance": "Top Up Balance",
     "enterAmount": "Enter amount",
+    "paymentMethod": "Payment Method",
     "paymentMethods": "Payment Methods",
     "transactionHistory": "Transaction History",
     "noTransactions": "No transactions",

src/locales/fa.json

@@ -184,6 +184,7 @@
     "topUp": "شارژ",
     "topUpBalance": "شارژ موجودی",
     "enterAmount": "مقدار را وارد کنید",
+    "paymentMethod": "روش پرداخت",
     "paymentMethods": {
       "yookassa": {
         "name": "YooKassa",

src/locales/ru.json

@@ -254,6 +254,7 @@
     "topUp": "Пополнить",
     "topUpBalance": "Пополнение баланса",
     "enterAmount": "Введите сумму",
+    "paymentMethod": "Способ оплаты",
     "paymentMethods": "Способы оплаты",
     "transactionHistory": "История операций",
     "noTransactions": "Нет операций",

src/locales/zh.json

@@ -185,6 +185,7 @@
     "topUp": "充值",
     "topUpBalance": "充值余额",
     "enterAmount": "输入金额",
+    "paymentMethod": "支付方式",
     "paymentMethods": {
       "yookassa": {
         "name": "YooKassa",