Include the "section anchor" doc id of the top of the page in the UI model
Your adoc page starts:
[[my-docid]] //optional; something calculated if missing
= My Wonderful Page
There's an id calculated from my-docid
that ought to be able to be used in a '#' fragment reference.
However, the embedded page generated by Asciidoctor for Antora doesn't include this element, so there's no way for Asciidoctor to make use of it.
This issue is to include this value in the UI page model so it may be inserted by the UI at an appropriate location.
A closely related issue regarding "doc roles" is #437 (closed)