iiviie/atlen — reverse-engineered prompt

Build me a full trip planning app called Atlen. I want people to be able to sign up, create trips, plan day by day itineraries, save places, make preparation checklists, track expenses, upload or manage travel documents, and keep a travel journal.

It should also support group trips, so multiple travelers can coordinate plans and see updates in real time. Add an AI travel assistant that can chat with the user and generate itinerary ideas based on where they’re going, dates, interests, and budget. Include search and filters for trips, activities, hotels, flights, and saved bucket list items.

Use the existing Django backend style in this project and make clean API endpoints that could support a web app and mobile app. Use location support for places and maps, and keep authentication secure with tokens. Make it easy to run locally with Docker, Postgres, and Redis. Look up current docs online if needed, and fill in any missing pieces in a sensible way.