separate delegations and root sessions as currently delegate sessions included in a root sessions list too

<img width="791" height="644" alt="Image" src="https://github.com/user-attachments/assets/dc5cd910-4176-4d4b-9443-e3467042417f" />

<img width="791" height="644" alt="Image" src="https://github.com/user-attachments/assets/0c3bff91-9fb8-4b2d-8e3a-bd9c989c6ad3" />

seems like a regression after refactor into ACP-only mode.