[BUG] Rewind list arrow key navigation broken in no-flicker mode

Bug Description

When using CLAUDE_CODE_NO_FLICKER=1, the rewind list (triggered by pressing Esc twice) is not navigable with arrow keys. The list renders but arrow key input has no effect — cannot move up/down through checkpoints at all.

Related to #42297 (mouse scroll broken in rewind list under no-flicker mode) but this is a separate issue affecting keyboard navigation.

Steps to Reproduce

1. Enable no-flicker mode: export CLAUDE_CODE_NO_FLICKER=1
2. Start a session and create at least one checkpoint (send any prompt)
3. Press Esc twice to open the rewind list
4. Try navigating with arrow keys

Expected Behavior

Arrow keys navigate up/down through the checkpoint list.

Actual Behavior

Arrow keys have no effect. List is completely non-navigable.

Environment Info

• Platform: darwin
• Terminal: Ghostty