[BUG] Auto collapse not update expandToSizes

[hungtcs]

When the panel is collapsed, the expandtoSizes in localStorage will automatically update to restore its size when the panel is expanded. But if auto-collapse is enabled, it won't update.

This causes the expanded size to be inconsistent with the size before collapsing.

Hopeful behavior: Before automatic collapsing, it can store the size before collapsed.

I read the documentation carefully and tried the existing APIs currently unable to do this.

Thank you!

[hungtcs]

https://github.com/user-attachments/assets/0469d001-ad27-4234-855c-5259777806e6

When the button is clicked to trigger collapse, the state is saved correctly. But when dragging triggers collapse, the state is not saved.