Feature Request: Collapsible Sections

[rverstappen]

I have kludged together a way to have Collapsible Sections using only the GUI but it would be great if this was a standard feature and not kludged. It's very useful when controlling various things via your phone. This short video shows an example of the functionality I envisage:

screen-20250712-211040.mp4

My kludge is to use duplicate sections and toggle helpers but it's not scalable with lots of independent phones running the same dashboard: too many toggle helpers needed. Ideally, the collapsed state would be specific to each dashboard instance.