fix(Autocomplete): keep typed text instead of restoring suggestion on blur

[jonrohan]

Closes #4275

Fixes an inconsistency in the Autocomplete component. Previously, pressing Escape cleared the input, but clicking outside (blurring) silently restored the full inline autocomplete suggestion. For example, after selecting "alligator" and deleting characters to get "alligat", clicking away would jump the value back to "alligator".

Now blurring the input keeps the text the user actually typed, matching the Escape behavior.

Changelog

Changed

• Autocomplete now keeps the typed text instead of restoring the full inline suggestion when the input loses focus.

Rollout strategy

• Patch release

Testing & Reviewing

Open the Autocomplete default story, type to get an inline suggestion, delete a few characters off the end, then click outside the input. The input retains the typed text rather than restoring the full suggestion. A unit test (does not restore the autocomplete suggestion when the input is blurred) covers this behavior.

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge

[changeset-bot]

🦋 Changeset detected

Latest commit: f2aaf29

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/react	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[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.

[Copilot]

Pull request overview

This pull request fixes a user-facing inconsistency in Autocomplete.Input where blurring the input could restore the full inline suggestion (e.g. jumping back to “alligator”) instead of keeping the text the user actually typed. The change aligns blur behavior with the existing Escape-key behavior and adds a regression test plus a patch changeset.

Changes:

• Prevent inline suggestions from being re-applied after the input loses focus, and reset the DOM value to the typed text on blur.
• Add a unit test ensuring blur does not restore the full inline suggestion.
• Add a patch changeset for @primer/react.

Show a summary per file

File	Description
packages/react/src/Autocomplete/AutocompleteInput.tsx	Ensures blur keeps the user-typed text and guards inline-suggestion application to focused inputs only.
packages/react/src/Autocomplete/Autocomplete.test.tsx	Adds a regression test that blurring the input retains typed text instead of the inline suggestion.
.changeset/autocomplete-blur-suggestion.md	Patch changeset describing the Autocomplete blur behavior fix for release notes.

Copilot's findings

• Files reviewed: 3/3 changed files
• Comments generated: 0

[primer-integration]

Integration test results from github/github-ui PR:

  CI Passed
  VRT Passed
  Projects Passed

All checks passed!