feat: RDG qwinsta/logoff via WinRM on client workstation (0.11.6)

SAC resolves internal_ip to a registered Windows host and runs qwinsta/logoff synchronously over WinRM instead of queueing commands to the gateway agent.

frontend/src/api.ts

@@ -180,6 +180,9 @@ export interface AgentCommandResponse {
   result_stderr?: string | null;
   created_at?: string | null;
   completed_at?: string | null;
+  target?: string | null;
+  client_hostname?: string | null;
+  internal_ip?: string | null;
 }
 
 export function postEventQwinsta(eventId: number): Promise<AgentCommandResponse> {