fix(display): allow text selection under markup annotations

[kairosci]

Fixes #18190.

This PR addresses a regression where text underneath highlight, underline, squiggly, and strikeout annotations could not be selected.
The cause was pointer-events: auto on the annotation container elements, which blocked mouse events from reaching the text layer.

Changes:

• Added pointer-events: none to .highlightAnnotation, .underlineAnnotation, .squigglyAnnotation, and .strikeoutAnnotation in web/annotation_layer_builder.css.
• Added an integration test test/integration/highlight_selection_spec.mjs to verify that the pointer-events property is correctly set to 'none'.

Verification:

• Verified manually that text selection works.
• Lint check passed.

[bcolsson]

Not sure if you intended to flag l10n for review or something else. It doesn't look like localization is affected.

[kairosci]

@bcolsson I do not understand what you are referring to, in any case the change does not affect nor refers to internationalization.

[flodolo]

@bcolsson I do not understand what you are referring to, in any case the change does not affect nor refers to internationalization.

You triggered a review from @mozilla/pdfjs-l10n (likely you pushed changes to a .ftl file at some point).

[kairosci]

You triggered a review from @mozilla/pdfjs-l10n (likely you pushed changes to a .ftl file at some point).

Could you link it to me? Thanks!

[flodolo]

You triggered a review from @mozilla/pdfjs-l10n (likely you pushed changes to a .ftl file at some point).

Could you link it to me? Thanks!

Not sure what you're asking to link to.

There are rules triggering automated review requests, depending on which files you touch
https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners

Touching .ftl files will trigger a review from Bryan's (and my) group.

[kairosci]

It seems strange to me, since I haven't modified any ftl files. Should I close the PR, or is there an alternative way to have it reviewed by the appropriate group?

[kairosci]

I share a screenshot of the result, which allows you to select and click on the selected part, or at least when I double-click on the selection, I see the section.

[kairosci]

@timvandermeij If you can, please let me know how to proceed, thank you!