[FEATURE] Add properly formatted code blocks to VS Code extension

[rosmur]

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

Right now, code is shown in a weird grey letter background formatting:

Proposed Solution

Please use proper code block formatting, like what is available in all other AI coding extensions like copilot, cline etc.:

Alternative Solutions

No response

Priority

High - Significant impact on productivity

Feature Category

Interactive mode (TUI)

Use Case Example

No response

Additional Context

No response