feat: show VPN connection info and subscription request history on admin user detail

- Load panelInfo eagerly on page load (not just on subscription tab)
- Add VPN connection card to info tab: last/first connection, online status indicator, last node
- Rename "Last activity" to "Bot activity" to distinguish from VPN connection
- Show cabinet_last_login field that was never rendered
- Add collapsible subscription request history section in subscription tab with paginated table
- Add subscription request history API types and method
- Add i18n keys for all 4 locales (ru, en, zh, fa)

src/locales/ru.json

@@ -3482,6 +3482,19 @@
         "language": "Язык",
         "registration": "Регистрация",
         "lastActivity": "Последняя активность",
+        "botActivity": "Активность в боте",
+        "cabinetLastLogin": "Последний вход в кабинет",
+        "vpnConnection": "VPN подключение",
+        "lastConnection": "Последнее подключение",
+        "firstConnection": "Первое подключение",
+        "online": "Онлайн",
+        "requestHistory": "История запросов подписки",
+        "requestHistoryTotal": "Всего запросов",
+        "requestAt": "Дата",
+        "requestIp": "IP адрес",
+        "requestUserAgent": "Устройство",
+        "loadMore": "Показать ещё",
+        "noRequests": "Нет запросов",
         "totalSpent": "Всего потрачено",
         "purchases": "Покупок",
         "campaign": "Рекламная кампания",