export declare function registerUploadPlaceholderBlobUrl(uploadId: string, blobUrl: string): void;
/**
 * Imperative DOM updates for rich upload placeholders (not synced via ProseMirror).
 * Mirrors platform shared/editor/commands/insertFiles.ts progress handling.
 */
export declare function updateUploadProgressDom(uploadId: string, fractionComplete: number): void;
/** Revoke object URL for this upload id (uses registry; safe after decoration is removed). */
export declare function revokeUploadPlaceholderBlob(uploadId: string): void;