Merge always-on healthy WeChat replies and device-only card removal

shared/cloud-agents.ts

@@ -216,6 +216,7 @@ export interface CloudUserChannelAccount {
   enabled: boolean;
   status: string;
   health: string;
+  worker_online?: boolean;
   blockers: string[];
   target_agent_slug: string | null;
   target_agent_name: string | null;