[FEATURE] support themes

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

Hi
This is just strange, that claude shows code diffs on dark theme only, regardless of the VSCode color theme settings.

Proposed Solution

Please add support for light theme in the diff view to match the user's VSCode/Cursor theme.

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_