export function parseImageGenerationModelRef(
  raw: string | undefined,
): { provider: string; model: string } | null {
  const trimmed = raw?.trim();
  if (!trimmed) {
    return null;
  }
  const slashIndex = trimmed.indexOf("/");
  if (slashIndex <= 0 || slashIndex === trimmed.length - 1) {
    return null;
  }
  return {
    provider: trimmed.slice(0, slashIndex).trim(),
    model: trimmed.slice(slashIndex + 1).trim(),
  };
}