import { EntityCommentsTree } from "../interfaces/EntityCommentsTree";
/**
 * Reddit-style deletion: instead of removing the comment from the tree,
 * mark it as user-deleted by clearing content fields and setting userDeletedAt.
 * The comment remains visible as a placeholder so children stay intact.
 */
export declare function markCommentAsDeletedInTree(state: EntityCommentsTree, commentId: string): EntityCommentsTree;