feat(web): show Box runtime status in plugin debug info popover

Add Box status section to the debug info popover on the plugin list page,
displaying connection status, backend info, profile, active sessions,
and recent error count. Fetched from GET /api/v1/box/status in parallel
with plugin debug info. Includes i18n for all 8 supported languages.

web/src/app/infra/entities/api/index.ts

@@ -351,6 +351,19 @@ export interface ApiRespPluginSystemStatus {
   plugin_connector_error: string;
 }
 
+export interface ApiRespBoxStatus {
+  available: boolean;
+  profile: string;
+  recent_error_count: number;
+  backend?: {
+    name: string;
+    available: boolean;
+  };
+  active_sessions?: number;
+  managed_processes?: number;
+  session_ttl_sec?: number;
+}
+
 export interface ApiRespAsyncTasks {
   tasks: AsyncTask[];
 }