Archive folder in FleetView shows empty/unclickable session list despite archived sessions existing

Description

In the FleetView session sidebar, the "АРХИВ" (Archive) folder used to display the list of archived sessions. Now it renders as an empty drop target ("Drag or move sessions here") and archived sessions are not visible or clickable inside it.

Confirmation this is a rendering bug, not missing data

Using the mcp__ccd_session_mgmt__list_sessions tool with include_archived: true, the backend correctly returns multiple sessions with isArchived: true, e.g.:

• "Дайджест технической поддержки июль" (local_a70be191-4156-485e-90dc-d7d2b3c43470)
• "тест каш ротация мнфк" (local_78dbd5a9-6f78-4fc1-bd35-e1cad0dacf2c)
• "Ответ Кириллу по треду" (local_144b2877-4b26-4137-8965-a0a94cccc3cc)

So the archived sessions exist and are correctly flagged server-side, but the Archive folder in the sidebar UI does not render or list them, and they cannot be clicked/opened from that folder.

Steps to reproduce

1. Archive one or more sessions.
2. Open the sidebar and expand the "АРХИВ" folder.
3. Observe that the folder shows only the empty-state placeholder ("Drag or move sessions here") instead of the archived session list.

Expected behavior

The Archive folder should list all archived sessions and allow opening them, as it previously did.

Screenshot

Screenshot shows the Archive folder expanded with the empty "Drag or move sessions here" placeholder and no session rows underneath.