Module diff_render 

Diff preview renderer — native ratatui Line/Span output.

Takes structured DiffPreview data from koda-core and produces Vec<Line<'static>> with:

• Proper unified diff with hunk headers and context lines
• Syntax highlighting with cross-hunk context (via pre-highlighted files)
• Dark background tint for diff lines (red removed, green added)
• Gutter metadata for NoSelect copy support

Constants

GUTTER_WIDTH

Width of the gutter: 4-digit line number + space + sigil + space = 7. Used by NoSelect to know how many leading columns to skip on copy.

Functions

render_lines

Render a DiffPreview as native ratatui Lines.