- Copy button appears on all messages (user + assistant), not just assistant
- Delete requires a confirm step — clarified in description
- Model tag position is below-left for assistant messages, not bottom-right
- Tool calls render as expandable per-call cards, not a single ⚡ N summary note
- help.html: default-open sections updated to Getting Started / Chat / Sessions / Model Registry
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>