Save the current chat as a Markdown file with all timestamps and model info.

Model is used for new chats.
Glitch Flex 1: Fast, accurate, a flex
Glitch Flex 2: Faster, more accurate, a bigger flex.
Glitch Comfort 1: Friendly, supportive, comforting.
Glitch Comfort 1-mini: Friendly, sarcastic, fun to talk to.