fix(acp): make xai cancellation reliable

Cancel pending prompt completions without restarting ACP, and keep text-only monitor acknowledgements tracked as background work.

Co-authored-by: codex <codex@users.noreply.github.com>
4fcf63df53Julius Marminge committed on 9/1/2026, 4:32:04 AMparent8f03943
2 files changedLine totals unavailable