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/en.json

@@ -3075,6 +3075,19 @@
         "language": "Language",
         "registration": "Registration",
         "lastActivity": "Last activity",
+        "botActivity": "Bot activity",
+        "cabinetLastLogin": "Last cabinet login",
+        "vpnConnection": "VPN connection",
+        "lastConnection": "Last connection",
+        "firstConnection": "First connection",
+        "online": "Online",
+        "requestHistory": "Subscription request history",
+        "requestHistoryTotal": "Total requests",
+        "requestAt": "Date",
+        "requestIp": "IP address",
+        "requestUserAgent": "Device",
+        "loadMore": "Show more",
+        "noRequests": "No requests",
         "totalSpent": "Total spent",
         "purchases": "Purchases",
         "campaign": "Advertising campaign",

src/locales/fa.json

@@ -2579,6 +2579,19 @@
         "language": "زبان",
         "registration": "ثبت‌نام",
         "lastActivity": "آخرین فعالیت",
+        "botActivity": "فعالیت در ربات",
+        "cabinetLastLogin": "آخرین ورود به کابینت",
+        "vpnConnection": "اتصال VPN",
+        "lastConnection": "آخرین اتصال",
+        "firstConnection": "اولین اتصال",
+        "online": "آنلاین",
+        "requestHistory": "تاریخچه درخواست‌های اشتراک",
+        "requestHistoryTotal": "کل درخواست‌ها",
+        "requestAt": "تاریخ",
+        "requestIp": "آدرس IP",
+        "requestUserAgent": "دستگاه",
+        "loadMore": "نمایش بیشتر",
+        "noRequests": "بدون درخواست",
         "totalSpent": "کل هزینه",
         "purchases": "خریدها",
         "campaign": "کمپین تبلیغاتی",

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",

src/locales/zh.json

@@ -2578,6 +2578,19 @@
         "language": "语言",
         "registration": "注册时间",
         "lastActivity": "最后活跃",
+        "botActivity": "机器人活动",
+        "cabinetLastLogin": "最后登录面板",
+        "vpnConnection": "VPN 连接",
+        "lastConnection": "最后连接",
+        "firstConnection": "首次连接",
+        "online": "在线",
+        "requestHistory": "订阅请求历史",
+        "requestHistoryTotal": "总请求数",
+        "requestAt": "日期",
+        "requestIp": "IP 地址",
+        "requestUserAgent": "设备",
+        "loadMore": "显示更多",
+        "noRequests": "没有请求",
         "totalSpent": "总消费",
         "purchases": "购买次数",
         "campaign": "广告活动",