get_calendar_events / create_calendar_event never matched the "calendar"
prefix and fell back to the wrench icon; match "calendar" anywhere in the
tool name instead.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Tool calls in a turn now render as one ActivityTimeline block: expanded
with "Simba is working…" while running (icon, label, input summary,
spinner/✓/✗, duration, Open chip for artifacts), collapsing to
"Simba worked · N steps · 4.2 s" when the turn finishes. useChat keys tool
rows by run_id (parallel calls), synthesises ids for legacy servers that
send only {tool}, and restores rows from the conversation payload.
Adds src/api/artifactTypes.ts (shared with the artifact panel) and a
dependency-free mock API server under test-fixtures/cowork/.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ryan Chen