Currently, available booking slots from Appointment Scheduling don't appear
as visible blocks in my calendar view. I can only see confirmed bookings.

Feature request:
Show available booking slots as light-colored blocks vs. darker colors for
confirmed bookings. This provides instant visual clarity on my availability.

Why this matters:
- Quick overview of potential booking windows
- Better calendar planning without manual workarounds

- Prevents confusion between "open" and "booked" time

Workaround exists (separate calendars) but all events show as "busy"
since Proton Calendar lacks Free/Busy status per event.

Vote appreciated!