DetailView for last review before sending email

A really neat feature would be to display a DetailView before sending the email just as a last step review. That way we can detect spelling on Subject and/or Body of the email and also verify our To email address.

It will be really similar to the Test Send Email action but without the smtp configuration info.

Of course we would still have the option to send the email with the toast but without the detail-view and also silently

Start by tracing the existing Test Send Email action and the current email-sending flow, including the toast option. Compare the proposed review step with that action while omitting SMTP configuration details. Done means a DetailView can review the subject, body, and recipient before sending, while the existing toast and silent sending options remain available.

Written by the indexing model from the issue text.