docs(ui): stop teaching record:highlights.actions — nothing has ever rendered it

Found by the #3746-style corpus scan this batch owes: every `content/docs/**`
and `skills/**` code block carrying a registered component type was parsed and
its props judged against the now-closed `ComponentPropsMap`. One hit, in the
"Complete Example" of the pages guide — an `os:check` block, so it is an example
the docs gate compiles and an AI author copies.

`RecordHighlightsProps` has never declared `actions`, and objectui's
`record-highlights.tsx` reads `schema.fields` and nothing else. Under strip the
key was dropped in silence, which is precisely why a doc could teach it for this
long: the example parsed clean and rendered without the actions, and no layer
disagreed. With the shape closed it is a rejection, so the doc had to be right
before the batch could land.

The actions move to `record:quick_actions`, which is the component that renders
them (`actionNames`, per objectui's own designer config) and which the same page
already lists two sections up.

Scan after the fix: 392 mdx + 2299 markdown files, 8 registered-type props bags,
0 teaching a key these schemas reject. `check:skill-examples` — 209 prose
examples type-check.

Part of #4001

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012NLJ8PWLdwLSyi84LHzrAx

Author: claude

content/docs/ui/pages.mdx

@@ -196,7 +196,14 @@ const accountRecordPage = {
           id: 'header',
           properties: {
             fields: ['name', 'type', 'industry', 'owner'],
-            actions: ['edit', 'delete', 'clone'],
+          },
+        },
+        // Record actions are their own component — `record:highlights` renders
+        // field chips and nothing else.
+        {
+          type: 'record:quick_actions',
+          properties: {
+            actionNames: ['edit', 'delete', 'clone'],
           },
         },
       ],