feat(web): show active sandbox details in Box status popover

Display sandbox count and a detailed list of active sessions including
session ID, image, backend, resources (CPU/memory), network mode, and
last used time. Fetched from GET /api/v1/box/sessions in parallel.
Includes i18n for all 8 supported languages.

web/src/i18n/locales/vi-VN.ts

@@ -478,7 +478,12 @@ const viVN = {
     boxUnavailable: 'Không khả dụng',
     boxBackend: 'Backend',
     boxProfile: 'Hồ sơ',
+    boxSandboxes: 'Sandbox',
     boxErrors: 'Lỗi',
+    boxSessionImage: 'Image',
+    boxSessionBackend: 'Backend',
+    boxSessionResources: 'Tài nguyên',
+    boxSessionNetwork: 'Mạng',
     boxStatusLoadFailed: 'Tải trạng thái Box thất bại',
     failedToGetDebugInfo: 'Lấy thông tin gỡ lỗi thất bại',
     copiedToClipboard: 'Đã sao chép vào clipboard',