Share Availability: Resizable vertical divider for viewing full slot titles

In the 'Share Availability' view, the vertical divider line between the calendar and the right panel cannot be dragged/resized. This causes recurring slot titles to be partially hidden, which is inconvenient for power users who frequently use this feature.

It would be great to add the ability to resize this divider or make the right column wider, so that full slot titles are visible. This would significantly improve usability for users who rely heavily on this feature.