Built study session part with language flashcards

Today I focused on building the language study flashcards part of langnotes.app.

This will be the space where users can actually review and repeat what they’ve saved in their collections.

Right now, I’m shaping the logic for how sessions are created, how cards are shown and flipped, and how progress might be tracked later.

It’s still early, but this part feels like the heart of the app where everything comes together into real learning flow.