/**
 * Template injection prevention.
 *
 * Escapes curly braces in dynamic content so they are not
 * interpreted as template variables by the template engine.
 *
 * This module has ZERO dependencies on TAKT internals.
 */
/**
 * Replace ASCII curly braces with full-width equivalents
 * to prevent template variable injection in user-supplied content.
 */
export declare function escapeTemplateChars(str: string): string;