I'd been waiting/hoping for someone to make something like this. Well done. A few ideas that will not clutter the UI but you might consider:

  - when a user changes the score slider, encode that in the URL with a hash tag, so they can bookmark the page with their preferred settings
  - a left button allowing me to step back to yesterday's news
  - to simplify newsletter signups, just accept an e-mail address right on that page
  - your **advanced** options:
    - have GPT score each news story across common labels: science, politics, entertainment, news, etc. Then allow these as a filter. If I want to see the top science stories of the day, that should be easy.
    - have GPT write a 2 sentence summary of each story as a lead-in after the headline title
    - a user/saved whitelist/blacklist of news sites
    - any advanced setting should be shareable. For example, if someone puts the effort in to make a page with just Australian news sources, focused on sports, with a minimum score of 5.0, they could save that with a title that can be shared for anyone.

Congrats on a well-executed project.