Feature Request: Make thinking process text color configurable (red is misleading for developers)

Summary

The thinking process (extended thinking / reasoning text) is currently displayed in red in the Claude Code CLI interface. For developers, red is a strongly established convention that signals errors, failures, or critical warnings. Seeing red text while Claude is simply reasoning causes unnecessary alarm and cognitive confusion.

Problem

• Red text in terminal UIs universally signals: compilation errors, test failures, runtime exceptions, permission denied messages, etc.
• When the thinking process appears in red, developers instinctively assume something went wrong.
• This creates a poor UX especially during long reasoning sessions where the red text dominates the screen.

Proposed Solution

1. Change the default color of thinking/reasoning text to something neutral or positive — e.g., green, cyan, dim white, or gray.
2. Allow users to configure the color via settings.json, for example:

``json
{
"thinkingTextColor": "green"
}
``

Why Green (or another non-red color)?

• Green is already associated with Claude's brand identity.
• It signals "in progress / working" rather than "error".
• Cyan/dim is commonly used for informational/debug output in CLIs.

Impact

Low-effort change with high UX impact for all developer users of Claude Code CLI.

Thank you for considering this improvement!