feat: migrate Telegram Login Widget to v23 with admin-configurable settings

- Upgrade telegram-widget.js from v22 to v23 (TelegramLoginButton + ConnectedAccounts)
- TelegramLoginButton fetches widget config from API instead of hardcoded values
- Add TelegramWidgetConfig type and API method with fallback to env defaults
- Remove botUsername prop — now sourced from backend API
- Add useEffect cleanup to prevent orphaned iframes on unmount
- Add TELEGRAM_WIDGET category to admin interface settings menu
- Add i18n translations for widget settings (ru, en, zh, fa)

src/locales/en.json

@@ -1681,7 +1681,16 @@
       "projectName": "Project name",
       "quickPresets": "Quick presets",
       "resetAllColors": "Reset all colors",
-      "statusColors": "Status colors"
+      "statusColors": "Status colors",
+      "categories": {
+        "TELEGRAM_WIDGET": "Telegram Login Widget"
+      },
+      "settingNames": {
+        "Telegram Widget Size": "Widget Size",
+        "Telegram Widget Radius": "Corner Radius",
+        "Telegram Widget Userpic": "Show User Photo",
+        "Telegram Widget Request Access": "Request Access"
+      }
     },
     "theme": {
       "accentColor": "Accent color",

src/locales/fa.json

@@ -1341,7 +1341,16 @@
       "projectName": "نام پروژه",
       "quickPresets": "پیش‌تنظیم‌های سریع",
       "resetAllColors": "بازنشانی همه رنگ‌ها",
-      "statusColors": "رنگ‌های وضعیت"
+      "statusColors": "رنگ‌های وضعیت",
+      "categories": {
+        "TELEGRAM_WIDGET": "Telegram Login Widget"
+      },
+      "settingNames": {
+        "Telegram Widget Size": "اندازه ویجت",
+        "Telegram Widget Radius": "شعاع گوشه",
+        "Telegram Widget Userpic": "نمایش تصویر کاربر",
+        "Telegram Widget Request Access": "درخواست دسترسی"
+      }
     },
     "buttons": {
       "color": "رنگ دکمه",

src/locales/ru.json

@@ -1762,6 +1762,10 @@
         "Subscription Show Devices": "Показывать устройства",
         "Telegram Stars Enabled": "Stars включены",
         "Telegram Stars Rate Rub": "Курс Stars (₽)",
+        "Telegram Widget Size": "Размер виджета",
+        "Telegram Widget Radius": "Скругление углов",
+        "Telegram Widget Userpic": "Показывать аватар",
+        "Telegram Widget Request Access": "Запрос доступа",
         "Tribute Api Key": "API ключ",
         "Tribute Donate Link": "Ссылка доната",
         "Tribute Enabled": "Tribute включен",
@@ -2164,6 +2168,7 @@
         "PAL24": "PAL24",
         "WATA": "Wata",
         "TELEGRAM": "Telegram",
+        "TELEGRAM_WIDGET": "Telegram Login Widget",
         "SUBSCRIPTIONS_CORE": "Основные",
         "SIMPLE_SUBSCRIPTION": "Простая подписка",
         "PERIODS": "Периоды",

src/locales/zh.json

@@ -1379,7 +1379,16 @@
       "projectName": "项目名称",
       "quickPresets": "快速预设",
       "resetAllColors": "重置所有颜色",
-      "statusColors": "状态颜色"
+      "statusColors": "状态颜色",
+      "categories": {
+        "TELEGRAM_WIDGET": "Telegram Login Widget"
+      },
+      "settingNames": {
+        "Telegram Widget Size": "小部件大小",
+        "Telegram Widget Radius": "圆角半径",
+        "Telegram Widget Userpic": "显示头像",
+        "Telegram Widget Request Access": "请求访问权限"
+      }
     },
     "buttons": {
       "color": "按钮颜色",