Show HN: I built a simple habit tracker

Over the holidays, I built a simple habit tracker that lets you track any event's start and end time.

In the process, I upgraded my personal homepage to Next.js 15, added Payload CMS and NextUI, and experimented with React Server Components and Actions.

Check it out: https://mojica.de/tracker

You can create new event types by entering activities in the top text field. Events are automatically started for new types.