Administration: Add hierarchy descriptions to page row titles

[Maxerns]

Adds accessible hierarchy information to child page row titles in the Pages list table.

The visual dash prefix is moved outside the title link and marked aria-hidden, keeping the link’s accessible name aligned with its visible title. Child page links now reference a hidden description with aria-describedby, using the immediate parent title.

Adds PHPUnit coverage for:

• child page row titles including an aria-describedby hierarchy description
• top-level page row titles not receiving hierarchy descriptions

Trac ticket: https://core.trac.wordpress.org/ticket/64932

Testing

Passed:

• npm run test:php -- --filter Tests_Admin_wpPostsListTable tests/phpunit/tests/admin/wpPostsListTable.php
• npm run test:php -- --group 64932
• git diff --check

Use of AI Tools

AI assistance: yes.
Tool(s): Codex
Model(s): GPT-5.5
Used for: Test additions

[github-actions]

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[github-actions]

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[github-actions]

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