export function navigationIconPath(slug: string): string | null {
  if (slug === "overview") return "/icon/nav/Overview.webp";
  if (slug === "weapon") return "/icon/nav/Weapon.png";
  if (slug === "artifact") return "/icon/nav/Artifact.webp";
  if (slug === "constellations") return "/icon/nav/Constellations.webp";
  if (slug === "team") return "/icon/nav/Team-calc.webp";
  if (slug === "extra" || slug.startsWith("extra-")) return "/icon/nav/Extra.webp";
  return null;
}