# Issue 81: Theme gallery

## Problem

No visual gallery showing what each theme looks like. Users can't preview themes before choosing one.

## Scope

- Create docs/themes.md with a visual gallery
- Render the same representative diagram (flowchart with decision, sequence, class) in all 4 themes
- Include SVG images inline so they display on GitHub
- Show how to use each theme (API and CLI examples)
- Regenerate gallery SVGs via a script for easy updates
