I have added the auto-copy to clipboard functionality that will come with the next Android release and be included in all others. Adding a hotkey / quickbar button is on the roadmap for the desktop versions.
If you want to give the Linux version a shot, you can download it from here - https://downloads.formait.app/whistle/linux/WhistleDesktop-l... - I've just stuck it in the same R2 bucket as another app, as I've not sorted the proper pipeline out yet.