Patch Changes
- 1513e91: Show cancelled turn reasons in chat and session detail via an orange cancelled banner, projecting the wire reason on message metadata from turn.done (including live commits).
- f5672f1: Show MCP auth resume turn boundaries and unanswered ask_user prompts in Sessions view.
- 694a572: Reject duplicate sandbox environment names on create (POST) instead of overwriting via upsert.