Allow dueAt/description patches for collaborators when editPolicy is creator-only, and show the no-edit warning only when they try to change locked fields—not as a permanent banner.
Co-authored-by: Cursor <cursoragent@cursor.com>
Add editPolicy (default creator-only), enforce it in the API, surface clear permission messages, and drop the redundant edit menu now that detail is editable.
Co-authored-by: Cursor <cursoragent@cursor.com>