Function applyBackgroundToLine

packages/pi-tui/src/utils.ts:919–928

(line: string, width: number, bgFn: (text: string) => string)

 * @returns Line with background applied and padded to width
 */
export function applyBackgroundToLine(line: string, width: number, bgFn: (text: string) => string): string {
	// Calculate padding needed
	const visibleLen = visibleWidth(line);
	const paddingNeeded = Math.max(0, width - visibleLen);
	const padding = " ".repeat(paddingNeeded);

	// Apply background to content + padding
	const withPadding = line + padding;
	return bgFn(withPadding);
}

/**
 * Truncate text to fit within a maximum visible width, adding ellipsis if needed.