/config: search/list keyboard navigation breaks after switching tabs and returning

What happened:

In the /config panel, after using the search field, switching to another tab, then switching back, keyboard focus no longer returns to the search box or settings list — I can't move down through the results anymore. Focus appears to get stuck and the only fix is to Esc out and reopen /config.

Steps to reproduce:

1. Open /config
2. Type a query into the search field
3. Switch to another tab (Shift+Tab)
4. Switch back to the original tab
5. Try to navigate down through the settings list with the arrow keys — nothing responds

Expected: Focus should return to the search field / list so I can keep navigating results.

Actual: Navigation is dead until I close and reopen /config.

Environment:

• Claude Code version: 2.1.201
• OS: Linux (kernel 6.18)
• Shell: bash
• Interface: terminal CLI

Frequency: Reproducible every time.