Future me will have better AI and can solve this small but annoying problem later

Build in public day 25/30: Finding it's really hard to consistently have the AI distinguish a habit check-in from today vs. yesterday in 𝕏treeks, especially with the tiny context of a tweet.

It's just not a big enough problem to solve right now, so we'll probably just add the UI to adjust the date of a check-in if needed and circle back to doing it with the AI later. In the meantime, the AI will only get smarter 🚀