remaining stuff to get AI working

• also port all current indexedDB stuff to Dexie
• indexedDB/localStorage caching...? at least have the fetcher hit a per-session cache perhaps
• tool for frame fetching (option to show to user)
• add guide for getting API key
• reimplement downloading (see popup/main.tsx:54)
• update system prompt with tools
  • key thing -- if you wanna see the result, end your turn and the user will show you the frame
• cleanup and publish
  • prettier
  • remove console.logs
  • screenshots
  • deploy