[FEATURE] Add built-in setting to customize the Claude Code ASCII banner/logo in terminal

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

User's can't customize the ASCII diagram in the terminal on Claude Code start up.
It would be useful to set it globally and per project.

I believe the current Anthropic constant logo switching provides a negative user experience.

Proposed Solution

If you can change it, why don't you allow user's to change it to a custom one, it's only fair.

It's nothing different than allowing the user's to change color schemes.

Alternative Solutions

Alternate solutions would be to keep a static ASCII diagram logo.

Priority

High - Significant impact on productivity

Feature Category

Other

Use Case Example

Since I utilize Claude Code everyday, I would set the ASCII to what I want to see when I open Claude Code from a specific project folder or set it globally to a custom ASCII diagram.

Additional Context

_No response_