Code Editor: Distinguish the active persistent search result

[Sukhendu2002]

Trac ticket: https://core.trac.wordpress.org/ticket/42586

Use of AI Tools

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[github-actions]

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[Copilot]

Pull request overview

This PR improves the WP admin CodeMirror-based code editor search UI by adding a distinct visual treatment for the active “persistent search” match while the search input is focused, and adds E2E coverage to prevent regressions.

Changes:

• Add a JS behavior to mark the currently active search result with a dedicated CSS class while the search field is focused.
• Add admin CSS styling for the active persistent search result marker when the editor is not focused.
• Add Playwright E2E tests covering the active marker behavior and interactions with styleSelectedText defaults/overrides.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
tests/e2e/specs/code-editor-search.test.js	Adds E2E specs asserting active vs inactive persistent search result behavior and styleSelectedText interactions.
src/wp-admin/css/code-editor.css	Styles .CodeMirror-searching-selected to visually distinguish the active match when editor focus is elsewhere (e.g., search field).
src/js/_enqueues/wp/code-editor.js	Adds configurePersistentSearchHighlight() to mark the active match while the search field has focus, and wires it into editor initialization.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

[github-actions]

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