- Thread CRUD: GET /, POST /, GET /:id, PUT /:id, DELETE /:id - Candidate CRUD: POST /:id/candidates, PUT/DELETE nested candidates - Resolution: POST /:id/resolve with validation and error handling - Image cleanup on thread/candidate deletion - Routes mounted at /api/threads in server index Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>