Function parentFolderPath

src/utils/pathUtils.ts:13–17

(path: string)

 * path (no trailing slash). A file at the vault root yields an empty string.
 */
export function parentFolderPath(path: string): string {
  const normalized = normalizePath(path);
  const slashIndex = normalized.lastIndexOf('/');
  return slashIndex === -1 ? '' : normalized.slice(0, slashIndex);
}