anchor: add visited configurable

[devadula-nandan]

Closes N/A

Observed while building WYSIWYG editor (also while reviewing carbon-design-system/carbon#21887) when i noticed visited styles are missing from anchor tags.
Add configurable :visited styles to anchor element

I have default it to false. waiting for a review. to decide if we can default it to true. and configurable to be false.
so that it matches the native anchor behavior by default.

Changelog

New

• new anchor config style for :visited state

Testing / Reviewing

new demo path /?element=anchor&demo=visited can be found and verified

Screen.Recording.2026-06-22.at.11.03.06.PM.mov

PR Checklist

As the author of this PR, before marking ready for review, confirm you:

• Reviewed every line of the diff
• Updated documentation (notes, example, sass annotations)
• Addressed any impact on accessibility (a11y)
• Tested for cross-browser consistency
• Validated that this code is ready for review and status checks should pass

[janhassel]

Thank you for bringing this up, @devadula-nandan!

I agree actually that the default should be true instead of false to more closely align with web standards. In addition to that I only have two minor comments.

[janhassel]

Looks great overall! I'm just noticing some browser inconsistencies.

In Safari (tested with 26.5) the icon doesn't receive the correct color:

In Firefox (tested with 152), there are artifacts when hovering over a visited link