[FEATURE] Archiving a Cowork chat makes it unrecoverable through the UI — no Archived section, no unarchive option

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I archived several Cowork chats in the Claude desktop app and they vanished completely. There is no "Archived" section, filter, or toggle anywhere in the sidebar or in "Chats and tasks" — no way to view or unarchive them. This looks related to existing issues #22931 and #50042.

What makes it worse: when asked how to unarchive, both Claude and claude.ai confidently describe an "Archived section in the sidebar" that does not exist, sending users in circles.

The data is not lost — archiving just sets "isArchived": true in the session metadata JSON under ~/Library/Application Support/Claude/local-agent-mode-sessions/. I only recovered my chat by quitting the app and manually flipping that flag with sed, after which the chat reappeared and works normally. That should never be the required path for an end user.

Proposed Solution

an Archived section (like Projects already has) with an unarchive action; a confirmation dialog on archive that states where the chat goes; and until then, at minimum stop hiding archived chats from search.

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

Interactive mode (TUI)

Use Case Example

_No response_

Additional Context

_No response_