If I got to Special:History/User_talk:André_Costa_(WMSE) (in mobile view). There is no indication that I'm in the user_talk namespace. While making the distinction between main and user namespace might not be critical (you are unlikely to intend to go to one but end up on the other) not making a distinction between a namespace and it's associated talk namepace is likely to lead to confusion.
Examples which all look identical:
Regular page edit history
Namespace edit history
MinervaTemplate currently has no concept of links/components that can be placed above the heading. We'd need to add this capability inside Minerva before dealing with this in MobileFrontend. There is no precedent for doing this and this would only work on Minerva - not other skins.
It would be easier to put the link under the heading e.g. consider breadcrumbs on https://m.mediawiki.org/wiki/Reading/Web/Team
On beta cluster please verify that Special:History page shows Talk label for articles from talk namespace, as an example:
On production, the talk page history will show only "Planet", wihout "Talk" label.
The namespace label should be visible only on talk namespaces (there are plenty of those) and additionally it should be translated, example:
- if the user is on a talk namespace, it must be noted on the page, as per the mockups
note: go back link does not need to be present for now