Thanks mate!

Right now, it's a mix of both let's say.

first, local storage during the session (useful for example in gyms, garages, or basements with poor or no connectivity)

second, syncs with the backend once the session ends and if failed, periodically.

For the tracking, the idea is to eventually generate progress graphs, track "volume" over time, and visualize trends for each exercise or muscle group.

More to come on that front :D