[FEATURE] Git style diff for dark theme

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

I work with Claude and I like to review that Claude outputs before accepting.

I'm using Gnome shell with default theme and Dark mode in claude.

Diffs are super hard to read

<img width="861" height="33" alt="Image" src="https://github.com/user-attachments/assets/c9a58dae-3766-45d4-8f87-3616969bde71" />

Would it be possible to get git diffs style

<img width="820" height="33" alt="Image" src="https://github.com/user-attachments/assets/79216e52-4565-4548-92d7-f25eb0808e64" />

Super easy to read, current style is very tiring on the eyes 🙏 . Basically instead of diffing the background, diffing the text

Proposed Solution

Either a dark theme git diff, or a diff style menu

Alternative Solutions

_No response_

Priority

Medium - Would be very helpful

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_