refactor(web): proposed-plan follow-ups and implement-in-new-thread live in their own hooks (#23091)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
36d1e2fec5Julius Marminge committed on 10/21/2026, 9:25:09 PM· committed by GitHubparent5b715cc
3 files changedLine totals unavailable