Keep header with actions separated from email content to allow actions after scroll down

Is your feature request related to a problem? Please describe.

I would like to propose a usability improvement in the reading pane of emails.

Currently the top part of the email message contains the sender and the available actions (Reply to All, Reply, Star...). This sort of header is part of the email content frame and disappears when scrolling down to read the email content.
As result, to be able to reply or delete a message, the user needs to scroll back to the top.

Describe the solution you'd like

The usability would be much better if the actions would remain visible even scrolling down to read the message (like the subject of the email).
The actions could be placed somewhere else, like on the right side of the subject line.

Describe alternatives you've considered

No response

Additional context

No response

Start at the mail reading pane and inspect how the message header and actions are rendered relative to the scrollable email content. Confirm the existing subject-line behavior and determine where the actions can remain visible without obscuring the message. Done means reply, delete, star, and related actions remain accessible while scrolling through an email.