feat(web): move runtime status to dashboard, clean up plugin debug popover

Add SystemStatusCards component to the monitoring dashboard showing
Plugin Runtime and Box Runtime connection status with details (backend,
profile, sandbox count). Remove all Box/session status from the plugin
page debug popover — it now only shows debug URL and key.

Includes i18n for all 8 supported languages.

web/src/i18n/locales/en-US.ts

@@ -1253,6 +1253,16 @@ const enUS = {
       sessions: 'Sessions',
       feedback: 'User Feedback',
     },
+    pluginRuntime: 'Plugin Runtime',
+    boxRuntime: 'Box Runtime',
+    connected: 'Connected',
+    disconnected: 'Disconnected',
+    disabled: 'Disabled',
+    statusDetail: 'Status',
+    pluginDisabled: 'Plugin system is disabled',
+    boxBackend: 'Backend',
+    boxProfile: 'Profile',
+    boxSandboxes: 'Sandboxes',
   },
   limitation: {
     maxBotsReached: