Session name from /rename not shown in /resume picker

Description

After renaming a session with /rename, the custom name appears in the status bar during the active session but does not appear in the /resume picker. Instead, /resume shows the first user message as the session label.

Steps to reproduce

1. Start a new Claude Code session
2. Rename it with /rename (e.g., "DATAPLAT-1137")
3. Confirm the name appears in the status bar (top right)
4. Exit the session
5. Run /resume

Expected behavior

The /resume picker should show the custom session name ("DATAPLAT-1137").

Actual behavior

The /resume picker shows the first user message as the label (e.g., "Using warrensbox/tap/tfswitch Error: No available formula...") instead of the custom name.

Screenshots

Status bar shows custom name:
The renamed session shows "DATAPLAT-1137" in the top-right status bar while the session is active.

/resume shows first message instead:
The session list displays the truncated first user message, not the custom name.

Environment

• Claude Code CLI (macOS)
• Model: claude-opus-4-6