[BUG] Session picker: Preview mode (P) cannot exit with Escape/Enter

Environment

• Claude Code version: 2.1.3
• OS: macOS Darwin 24.6.0 (M4 Pro)
• Terminal: iTerm2

Bug: Preview mode cannot exit

Steps to reproduce:

1. Run claude --resume
2. In the session picker, press P to preview a session
3. Try to exit with Escape or Enter

Expected: Should exit preview mode and return to session list

Actual: Nothing happens. Keyboard input is ignored. Only Ctrl+C works to force quit.

Regression: This worked in 2.1.2 (2026-01-08), broken in 2.1.3 (2026-01-09)

Workaround

Use Ctrl+C to force quit and restart claude --resume