fix(ui): route VersionsPill through client exports bundle

The relocated `tabs/index.tsx` server module was importing the
`'use client'` VersionsPill via a relative path. In production bundles
that splits the DocumentInfo context across server and client chunks,
so useDocumentInfo() returns the default empty object, versionCount is
undefined, and the pill renders null — causing version-count e2e tests
to time out waiting for `.pill-version-count` to appear.

Routes this server→client edge through `@payloadcms/ui`'s
`exports/client` barrel (matching the pattern from
fd020ea) so the bundler treats the client module as the same
instance the DocumentInfoProvider populates.

Author: jacobsfletch

packages/ui/src/elements/DocumentHeader/Tabs/tabs/index.tsx

@@ -1,6 +1,7 @@
 import type { DocumentTabConfig, SanitizedCollectionConfig, SanitizedGlobalConfig } from 'payload'
 
-import { VersionsPill } from './VersionsPill/index.js'
+// eslint-disable-next-line payload/no-imports-from-exports-dir -- Server component must reference exports dir for proper client boundary
+import { VersionsPill } from '../../../../exports/client/index.js'
 
 export const documentViewKeys = ['api', 'default', 'livePreview', 'versions']
 

packages/ui/src/exports/client/index.ts

@@ -173,6 +173,7 @@ export type {
 export { TabError } from '../../elements/Nav/SidebarTabs/TabError/index.js'
 export { ShouldRenderTabs } from '../../elements/DocumentHeader/Tabs/ShouldRenderTabs.js'
 export { DocumentTabLink } from '../../elements/DocumentHeader/Tabs/Tab/TabLink.js'
+export { VersionsPill } from '../../elements/DocumentHeader/Tabs/tabs/VersionsPill/index.js'
 export { Wrapper as DefaultTemplateWrapper } from '../../templates/Default/Wrapper/index.js'
 export { FormHeader } from '../../elements/FormHeader/index.js'
 export { HierarchyTypeField } from '../../elements/HierarchyTypeField/index.js'