[Bug] Ctrl+E toggle state mismatch in transcript viewer: messages not showing

Bug Description
Bug: Ctrl+E in transcript viewer toggles state but does not hide/show messages

Version: Claude Code v2.1.89
OS: macOS 25.2.0

Description:
In the transcript viewer, pressing Ctrl+E toggles the label between "ctrl+e to hide N previous messages" and "ctrl+e to show N previous messages" correctly, but the actual messages are not hidden or shown — the
visible content remains identical in both states.

Steps to reproduce:

1. Open transcript viewer with Ctrl+O
2. Observe label: "ctrl+e to show N previous messages"
3. Press Ctrl+E
4. Label changes to "ctrl+e to hide N previous messages"
5. But the messages above are still fully visible — nothing is hidden

Expected: Previous messages collapse/hide when Ctrl+E is pressed (state = "show")
Actual: Messages remain visible regardless of toggle state

<img height="122" alt="Image" src="https://github.com/user-attachments/assets/d8837a37-0122-4ac7-b9f5-722b26313a69" />
<img height="122" alt="Image" src="https://github.com/user-attachments/assets/98ef50c1-e741-4adb-9407-77feea02def8" />

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.89
• Feedback ID: e2324a59-0435-409c-aca4-133b508be9c6