Adds MarkdownEditor (react-markdown + remark-gfm, no raw HTML — authored/retrieved
content is data, not markup) with Edit | Preview tabs, wired into the AGENTS.md and
SKILL.md editors, the agent persona, and the review artifact.
Adds a read-only "View" on every skill and agent-profile card — including builtins,
which previously had no way to be inspected at all — rendering the full SKILL.md /
AGENTS.md (frontmatter + body + actions/golden tests). Collapses a same-version
builtin that an org has forked so its own copy shadows it, keeping the version
picker unambiguous and the item clearly editable/versionable.
Also lands the agent-face wiring on the seat configurator (a live xl preview with a
state cycler) and the review inbox header.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>