feat(web): attach PDFs, ZIPs, and other files to a turn (#8236)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
bcb855a633Theo Browne committed on 8/29/2026, 4:57:54 AM· committed by GitHubparent6a9d9f9
30 files changedLine totals unavailable