[Bug] Tool permission prompt question text is hard to read on dark terminal backgrounds

Summary

When using Claude Code with a black/dark terminal background, the text displayed in the tool permission prompt (the question asking whether to allow a tool call) has very low contrast and is hard to read.

Steps to reproduce

1. Use a terminal with a black or very dark background
2. Trigger any tool call that requires user permission (e.g., a Bash command)
3. Observe the question text in the permission prompt — it blends into the dark background

Expected behavior

The permission prompt text should have sufficient contrast to be legible on both light and dark terminal backgrounds.

Additional context

This is related to the broader request for user-configurable color themes (#25366), but this specific case is arguably a bug rather than a feature request — the permission prompt is a critical UI element where the user needs to make a security decision, and poor readability can lead to approving actions without fully understanding what's being asked.

Environment

• Terminal: macOS Terminal.app / iTerm2 with dark background
• Platform: macOS