[FEATURE] Claude Desktop: show archived sessions as a collapsible sidebar group, most recent first, without switching the status filter

Problem

I often need to resume a session that has already been archived, and frequently I don't remember its name well enough for search to find it. Today the path is:

1. Switch the sidebar status filter to show archived sessions.
2. Scroll a lot — archived sessions come mixed into the list, not ordered by how recently they were archived or used.
3. Open the session.
4. Switch the filter back to active-only.

The session I want is almost always one of the last few I archived, so most of that scrolling and both filter switches are overhead.

Proposal

Show archived sessions as a group of their own in the sidebar — e.g. a collapsible Archived group at the bottom, alongside the regular groups, visible while the filter is on active sessions:

• sorted with the most recently archived (or most recently active) sessions at the top;
• collapsed by default, so it costs one row when not in use;
• limited to the latest N with a "show more" to load the rest, so it stays cheap with hundreds of archived sessions;
• clicking a row opens the session, with unarchive available from there as it is today.

That turns resuming a recently archived session into expand + click, with no filter change and no need to remember the title.

Related

• #67835 — asks for an Archived view in the desktop sidebar
• #92132 — archived sessions rendering inline inside their project group
• #86884 — the Archived Sessions group truncating on scroll (the "show more" above would need to avoid this)

Environment

• Claude Desktop 2.9939.4 (official claude-desktop .deb), Code tab
• Linux Mint 22.3, Cinnamon 6.6.9, X11