Function render_markdown_with_width 

pub fn render_markdown_with_width<'a>(
    text: &str,
    theme: &Theme,
    highlighter: &Highlighter,
    width: usize,
) -> Vec<Line<'a>>

Render markdown while constraining tables to a target content width.

This is primarily used by the chat view so markdown tables can wrap inside the available pane width instead of being broken by outer line wrapping.