All sessions/chats disappeared from sidebar after re-login (lost ~1 month of work)

After being forced to log in again, the Claude Code desktop app (Code tab) no longer shows any of my previous projects or chats in the sidebar — including work from roughly the past month. I only have one Claude account, so this isn't an org/workspace mismatch.

Environment:

• macOS 26.6.2 (build 25G83)
• Claude Code desktop app (Code tab)

Steps to reproduce:

1. Was using Claude Code normally with multiple sessions/projects over the past month.
2. Got logged out and had to log in again.
3. After re-login, the sidebar shows no previous sessions — not even archived ones.

Expected: Previous sessions/chats should still be listed after re-authenticating with the same account.

Actual: Sidebar is empty; no sessions found via the app's session list either.

Impact: Appears to have lost visibility into ~1 month of prior work/chat history.