Markdown Extension Sample

This file verifies that the .markdown extension uses the same renderer as .md. It is short enough for quick routing checks but still includes a list, inline code, and a fenced block.

Quick Checks

The file name ends with .markdown.
The title, paragraph, list and code fence share the same reading theme.
The preview surface does not inherit accidental text colors from the demo app.
```
**Flyfish Viewer** keeps Markdown readable in light and dark themes.
```