refactor(web): compact system status into a single card alongside metrics

Replace the separate two-card row with a single compact 'System Status'
card placed as the 5th column in the metrics grid. Shows green/red dots
for Plugin Runtime and Box Runtime. Click to expand a popover with
connection details (backend, profile, sandbox count).

web/src/i18n/locales/ru-RU.ts

@@ -1253,6 +1253,7 @@ const ruRU = {
       sessions: 'Сессии',
       feedback: 'Отзывы пользователей',
     },
+    systemStatus: 'Состояние системы',
     pluginRuntime: 'Среда плагинов',
     boxRuntime: 'Среда Box',
     connected: 'Подключено',