Function RenderSplitDiff

internal/ui/diff.go:321–346

RenderSplitDiff renders parsed diff in side-by-side layout.

(parsed ParsedDiff, filename string, styles Styles, t theme.Theme, width int)

// RenderSplitDiff renders parsed diff in side-by-side layout.
func RenderSplitDiff(parsed ParsedDiff, filename string, styles Styles, t theme.Theme, width int) string {
	if parsed.Binary {
		return RenderBinaryFile(styles, width)
	}
	initChromaStyle(t.ChromaStyle)

	pairs := PairLines(parsed.Lines)
	panelW := (width - 1) / 2 // 1 char for separator

	var b strings.Builder
	for _, sl := range pairs {
		// Hunk headers span full width
		if sl.Left != nil && sl.Left.Type == LineHunkHeader {
			b.WriteString(renderHunkLine(*sl.Left, styles, width))
			b.WriteByte('\n')
			continue
		}
		left := renderSplitSide(sl.Left, filename, styles, t, panelW, true)
		right := renderSplitSide(sl.Right, filename, styles, t, panelW, false)
		b.WriteString(left)
		b.WriteString(lipgloss.NewStyle().Foreground(lipgloss.Color(t.BorderFg)).Render("│"))
		b.WriteString(right)
		b.WriteByte('\n')
	}
	return b.String()
}

// RenderNewFileSplit renders untracked file content in split layout (all-added on right).
func RenderNewFileSplit(content, filename string, styles Styles, t theme.Theme, width int) string {