/**
 * Viewer city for discovery lists (home popular/category, category landing).
 *
 * - Guest / incomplete profile → no city filter (nationwide — marketing cold start)
 * - Logged-in with `profile.cityId` → that city
 *
 * City-scoped URLs (`/city/...`, category+city combo) always use the URL city
 * and do not call this helper. Home city-preview strip is separate (cookie).
 */
export function resolveViewerDiscoveryCityId(profileCityId: number | null | undefined, isLoggedIn: boolean): number | undefined {
  if (!isLoggedIn) return undefined
  if (profileCityId == null) return undefined

  return profileCityId
}