By: Michael Lynch <git@mtlynch.io>
Remove comments from media pages (m7-10) Replace the provisional 501 response with real comment deletion. A comment's author, or any owner, can delete it; the handler rejects other users with 403 and reports 404 for an unknown comment. This completes Milestone 7: users can add, edit, and delete comments and emoji reactions. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>