Participation already open with current edition

If the speaker/company already has a participation for the current edition, show already that one and the collapse will open the rest.

<img width="1530" height="314" alt="Image" src="https://github.com/user-attachments/assets/748d643b-5534-46f7-bb37-b2c41e098f49" />

Like this, but only this part open as default