Sidebar Recents and Pinned sections not displaying sessions after relaunch

Bug Description

The sidebar Recents and Pinned sections are not displaying sessions correctly. Only a single old session appears in Recents (the oldest/first session ever created), and Pinned sessions do not appear in the sidebar Pinned section — even after pinning and relaunching.

Environment

• Version: v1.4758.0 (bug present after relaunching to apply update)
• OS: Windows 11
• Project: local project directory

Steps to Reproduce

1. Use Claude Code across multiple sessions in a project
2. Relaunch the app (e.g. to apply a pending update)
3. Observe sidebar Recents — only one old session is shown, all newer sessions are missing
4. Pin a session via the session dropdown menu
5. Relaunch again
6. Observe sidebar Pinned section — pinned session does not appear there

Expected Behavior

• Recents should show the most recently active sessions
• Pinned sessions should appear in the Pinned section of the sidebar

Actual Behavior

• Recents shows only one session (the oldest one, from months/weeks ago), never updates
• Pinned section shows "Drag to pin" as if nothing is pinned
• The home screen Sessions panel correctly shows the pinned session — so the pin data is saved, the sidebar just doesn't render it

Additional Notes

• All session data is intact on disk at ~/.claude/projects/<project>/
• The home screen Sessions panel correctly shows pinned sessions
• The history.jsonl file has entries up to the current date, confirming sessions are being recorded
• The sidebar appears to be stuck/not syncing with actual session state
• Workaround: use the home screen Sessions panel for pinned sessions, and search to find others

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Reported by Lostwhen using Claude Sonnet 4.6