Method highlightCode

internal/tui/log.go:459–498

highlightCode applies syntax highlighting to code based on file extension.

(code, filePath string)

// highlightCode applies syntax highlighting to code based on file extension.
func (l *LogViewer) highlightCode(code, filePath string) string {
	// Strip line number prefixes from Read tool output (format: "   1→" or "   1\t")
	code = stripLineNumbers(code)

	// Get lexer based on file extension
	ext := filepath.Ext(filePath)
	lexer := lexers.Match(filePath)
	if lexer == nil {
		lexer = lexers.Get(ext)
	}
	if lexer == nil {
		lexer = lexers.Fallback
	}
	lexer = chroma.Coalesce(lexer)

	// Use Tokyo Night theme for syntax highlighting
	style := styles.Get("tokyonight-night")
	if style == nil {
		style = styles.Fallback
	}

	// Use terminal256 formatter for ANSI color output
	formatter := formatters.Get("terminal256")
	if formatter == nil {
		formatter = formatters.Fallback
	}

	// Tokenize and format
	iterator, err := lexer.Tokenise(nil, code)
	if err != nil {
		return ""
	}

	var buf bytes.Buffer
	if err := formatter.Format(&buf, style, iterator); err != nil {
		return ""
	}

	return buf.String()
}

// stripLineNumbers removes line number prefixes from Read tool output.
// The format is: optional spaces + line number + → or tab + content