bug: (minor) fix schedule UI labels

<img width="436" height="248" alt="Image" src="https://github.com/user-attachments/assets/bf6121c8-e048-4fa9-bff4-7f359d571c58" />

In the `/schedules` endpoint within the WebUI, I noticed that it seems to mislabel the various portions of my sleep schedule (e.g. "Fall asleep" at 7:15AM)