Replace deprecated ref helper usage

[joshblack]

Update usage our deprecated ref helper to use the new pattern for merging refs 🎉

Changelog

New

Changed

• Update useRefObjectAsForwardedRef to useMergedRefs

Removed

Rollout strategy

• None; if selected, include a brief description as to why

This is an internal refactor, functionality must be the same

[changeset-bot]

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Latest commit: 8234280

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[github-actions]

⚠️ Action required

👋 Hi, this pull request contains changes to the source code that github/github-ui depends on. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Check the integration testing docs for step-by-step instructions. Or, apply the integration-tests: skipped manually label to skip these checks.

To publish a canary release for integration testing, apply the Canary Release label to this PR.

[joshblack]

@copilot resolve the merge conflicts in this pull request

[Copilot]

@copilot resolve the merge conflicts in this pull request

Done — I merged origin/main into this branch and resolved the conflict in Heading.tsx in commit be2558736.

[Copilot]

Pull request overview

This PR replaces deprecated useRefObjectAsForwardedRef usage with the newer useMergedRefs pattern across several components in @primer/react, preserving existing behavior while improving ref compatibility (notably with callback refs / React 19 ref cleanups).

Changes:

• Swapped useRefObjectAsForwardedRef(...) + ref={internalRef} for const mergedRef = useMergedRefs(forwardedRef, internalRef) + ref={mergedRef} in multiple components.
• Updated Overlay/PageLayout/Dialog and several UI primitives to consistently forward and retain internal refs via merged refs.
• Adjusted an Autocomplete blur test to use deterministic fireEvent.blur + waitFor rather than userEvent.tab().

Show a summary per file

File	Description
packages/react/src/TextInputWithTokens/TextInputWithTokens.tsx	Use useMergedRefs to combine forwarded + internal input refs.
packages/react/src/PageLayout/PageLayout.tsx	Merge forwarded refs with context-provided pane/sidebar refs.
packages/react/src/Overlay/Overlay.tsx	Merge forwarded overlay ref with internal overlayRef.
packages/react/src/Link/Link.tsx	Merge polymorphic forwarded ref with innerRef used for dev warnings.
packages/react/src/Heading/Heading.tsx	Merge forwarded ref with internal heading ref.
packages/react/src/Dialog/Dialog.tsx	Merge forwarded dialog ref with internal dialogRef.
packages/react/src/deprecated/DialogV1/Dialog.tsx	Replace deprecated ref helper with merged refs in v1 dialog.
packages/react/src/Button/ButtonBase.tsx	Merge forwarded ref with internal button ref while preserving internal access.
packages/react/src/Autocomplete/AutocompleteOverlay.tsx	Merge scrollContainerRef and anchored-position floatingElementRef into Overlay ref.
packages/react/src/Autocomplete/AutocompleteInput.tsx	Merge forwarded ref with context inputRef.
packages/react/src/Autocomplete/Autocomplete.test.tsx	Make blur/close assertion deterministic in browser-mode Vitest.
packages/react/src/ActionList/Heading.tsx	Merge forwarded ref with internal heading ref passed to Heading component.
packages/react/src/ActionBar/ActionBar.tsx	Merge forwarded ref with internal IconButton ref.

Copilot's findings

• Files reviewed: 13/13 changed files
• Comments generated: 0

[primer-integration]

👋 Hi from github/github-ui! Your integration PR is ready: https://github.com/github/github-ui/pull/20750

[primer-integration]

Integration test results from github/github-ui:

  CI Passed
  VRT Passed
  Projects Passed

All checks passed!