White text in planning mode is invisible on light terminal themes (e.g. iTerm2 Solarized Light)

Summary

Text rendered during planning mode (follow-up questions / AskUserQuestion prompts) appears white, making it completely invisible on light terminal themes.

Environment

• Terminal: iTerm2
• Theme: Solarized Light
• OS: macOS

Steps to Reproduce

1. Use Claude Code with a light terminal theme (e.g. iTerm2 Solarized Light)
2. Enter plan mode on any task that triggers follow-up questions
3. The question text renders in white and is unreadable against the light background

Expected Behavior

Text should use a color with sufficient contrast against both light and dark terminal backgrounds, or respect the terminal's foreground color.

Suggested Fix

Use the terminal's default foreground color for question/prompt text, or choose a color with adequate contrast ratio on both dark and light backgrounds (e.g. a dark blue or dark cyan instead of white).