Allow for multiple generations in the summary and transcript tabs

Sometimes you don't know quite what you need, and I'd love to be able to change the summary type, length and/or style and have it regenerate for the same content without having to re-upload the audio.

Even better, would be the option to save previously generated requests alongside of being able to change these things.

For example:

Perhaps I want a short summary of a podcast for a description on my website, and pull out quotable moments, and a longer, more in-depth summary to put elsewhere.