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/th-TH.ts

@@ -1226,6 +1226,7 @@ const thTH = {
       sessions: 'เซสชัน',
       feedback: 'ความคิดเห็นผู้ใช้',
     },
+    systemStatus: 'สถานะระบบ',
     pluginRuntime: 'Plugin Runtime',
     boxRuntime: 'Box Runtime',
     connected: 'เชื่อมต่อแล้ว',