- PR icon color reflects merge state (open/merged/closed) via the
existing getWorkspacePrIconColor helper.
- PR badge is rendered before the failed-checks badge in the workspace
row.
- Hovering the PR badge swaps the GitPullRequest icon for ExternalLink
in place (same size, no layout shift) and removes the trailing arrow.
- Hovering the checks row in the workspace hover card brightens the
icon and "Checks" label to foreground.