You have a bunch of answers including one you chose, but you can always rebind the tmux key to something compatible with your terminals search and use [key] - d to disconnect from your tmux session then invoke it with tmux attach-session to get back into your session.

on attach it should clear the screen, print the stdout buffer it accumulated and give me stdin prompt, that’s it

The last part of the above, disconnecting from tmux and reattaching would do what you described. That may be useful if you need to work with tmux.

You made the accusation of vote manipulation twice, stand on your business or shut up.

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Good job. You should be proud of yourself for making this post.