refactor(web): the composer's layout and provider hooks live in their own files (#23042)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
22fd2aca1fJulius Marminge committed on 10/21/2026, 8:23:39 PM· committed by GitHubparentc19d997
7 files changedLine totals unavailable