[BUG] AskUserQuestion multiSelect: Enter key acts like Tab instead of selecting options

Description

When using AskUserQuestion tool with multiSelect: true, pressing Enter does not toggle option selection as expected. Instead, it acts like Tab and navigates to the next section/field.

Environment

• Version: 2.0.47 (published Nov 19, 2025)
• Platform: macOS
• OS Version: Darwin 24.6.0

Expected Behavior

When multiSelect: true is set in an AskUserQuestion prompt:

• Enter key should toggle selection on the currently highlighted option
• Tab key should navigate between different UI sections
• User should be able to select multiple options before submitting

Actual Behavior

• Enter key acts like Tab and switches to the next section
• Cannot select options using Enter
• MultiSelect functionality is effectively broken

Reproduction

1. Use AskUserQuestion tool with multiSelect: true parameter
2. When prompt appears, try to select an option using Enter key
3. Observe that Enter navigates to next section instead of selecting

Additional Context

• Tested and confirmed on version 2.0.47
• Version 2.0.47 was released yesterday (Nov 19, 2025), so this may be a recent regression
• No existing GitHub issues found documenting this specific multiSelect keyboard navigation bug
• Related issues exist for other AskUserQuestion bugs (#10229, #10267, #10848) but none specifically about multiSelect Enter/Tab behavior

Suggested Investigation

Try versions 2.0.46 or earlier to determine if this is a regression introduced in the latest release.