fix(field): respect existing aria-invalid

[eirikbacker]

Summary

Checks

• I have read the contribution guidelines
• I have added a changeset (run pnpm changeset if relevant)

[changeset-bot]

🦋 Changeset detected

Latest commit: de2c363

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

This PR includes changesets to release 5 packages

Name	Type
@digdir/designsystemet-web	Patch
@digdir/designsystemet-react	Patch
@digdir/designsystemet	Patch
@digdir/designsystemet-css	Patch
@digdir/designsystemet-types	Patch

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[github-actions]

Preview deployments for this pull request:

storybook - 21. Apr 2026 - 15:37

[Copilot]

Pull request overview

Updates the ds-field web component to avoid overwriting a consumer-provided aria-invalid, aligning field validation behavior with manual accessibility control.

Changes:

• Introduces an ATTR_INVALID constant and updates ds-field to only set aria-invalid when it is not already present.
• Replaces VALIDATIONS tracking from a WeakMap to a WeakSet since prior attribute restoration is no longer needed.
• Adds a changeset to release the fix as a patch for @digdir/designsystemet-web and @digdir/designsystemet-react.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
packages/web/src/field/field.ts	Stops overriding pre-existing aria-invalid and adjusts internal tracking accordingly.
.changeset/six-dragons-repair.md	Publishes the behavior change as a patch release.

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[unekinn]

Implementation looks good to me, tested to be working in Udir's repo.

[oddvernes]

Seems good!