Durations in 5-Minute Increments

Please change Proton Calendar Booking Pages so appointment durations can be set in 5-minute increments.

The current 15-minute minimum and limited duration choices are too restrictive. Many standard professional schedules require appointments of:

5 minutes
10 minutes
15 minutes
20 minutes
30 minutes
40 minutes
45 minutes
and other durations in 5-minute increments

Proton Calendar already allows users to manually create calendar events shorter than 15 minutes, but Booking Pages do not provide the same flexibility.

This limitation can prevent otherwise standard appointment workflows from being implemented through Proton Calendar Booking Pages at all. When other routine appointment types require other durations, that are not currently supported, users are unable to reproduce their existing scheduling workflow and therefore cannot use Proton Booking Pages as their scheduling solution.

This is more than a matter of creating inconvenient gaps in a schedule; for some professional users, the available duration options can determine whether the Booking Page feature is usable at all.

Please allow users to select any appointment duration in 5-minute increments, with a 5-minute minimum, rather than restricting Booking Pages to the current duration options.