Move getStateLabel and getActivityVerb out of pr-pane.tsx into pr-pane-data.ts
so they can be tested without JSDOM, React, or vi.mock. Add exhaustive unit tests
for both helpers alongside the existing mapPrPaneData/formatAge/deriveAvatarColor
coverage. Delete pr-pane.test.tsx — the component test was asserting on derived
label/icon strings that are now covered by pure function tests.
Introduce a PR tab in the explorer sidebar that shows status checks,
reviews, and the merged timeline for the current branch's pull
request. Extend checkout PR status with number, draft flag, repo
identity, and per-check workflow/duration; add a new
pull_request_timeline request/response pair backed by a GraphQL
query; enrich the workspace git snapshot to carry the fields through
to the client; and extend the checkout-git-actions store so timeline
queries are invalidated alongside status when mutations land.
Mohamed Boudra