[upstream] [BUGFIX] Centralize focus handling in the backend wizard

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Automatisch vorgeschlagener Cherry-pick aus TYPO3-CMS/form @ 14.3.

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Upstream-Commit

• SHA: 027a95102318c700b907838cfafa3b19738ec144
• Author: Benjamin Kott
• Date: 2026-07-03 16:17:33 +0200
• Reviewed-on (Gerrit): https://review.typo3.org/c/Packages/TYPO3.CMS/+/94804
• Resolves: #110151

Commit-Message

Upstream-Commit-Message anzeigen

[BUGFIX] Centralize focus handling in the backend wizard

typo3-backend-wizard never moved focus into a step on its own, leaving
it up to individual steps. As a result keyboard users landed on
inconsistent elements after navigating between steps, and steps that
load their content asynchronously received no focus at all.

Handle focus in the wizard itself. On every step change focus is
directed at the selected radio, otherwise the first form control and
otherwise the primary action button. Steps that build their content
asynchronously re-render the wizard once their data settles, so the
attempt is repeated on each update until a target appears; steps no
longer need to wire up focus themselves. Enter pressed inside a bare
input now advances the wizard, emulating a form submit.

The ad-hoc focus workaround in the form wizard's settings step is
removed as it is now handled centrally.

Resolves: #110151
Releases: main, 14.3

Change-Id: I146edb88c15da039b7d2d6243f27d0d72f2fef4b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/94804
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benjamin Kott <benjamin.kott@outlook.com>
Reviewed-by: Benjamin Kott <benjamin.kott@outlook.com>

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