Is there a way to add a button to the native Email/SMS compose window in ServiceM8 via the Add-on SDK?

Hi developers,

I’m developing a ServiceM8 Add-on (Simple Function) that provides translation support for outbound messages (emails and SMS).

Is there any official way to inject a custom button (e.g., "Translate") into the native message compose window in ServiceM8 (the window that appears when clicking "Email" or "SMS" inside a Job)?

I’m not referring to standalone modals or actions from the Job view, but rather extending the native interface.

Any confirmation, workaround, or roadmap info would be appreciated.

Thanks!