White icons for upcoming events in light mode

For the You & this person section on people's profiles, the calendar icon is white for upcoming events, even in light mode. It should have the regular foreground color.

<img width="48" height="44" alt="Image" src="https://github.com/user-attachments/assets/9bc662d2-da0b-4951-831f-4fc6fd41451c" />

In case this happens to be browser-specific, I saw this on Safari 27.

@kristian-zendato @susnux 