import type { Plugin } from 'vite';
/**
 * Minify HTML while preserving HBS (Handlebars) template expressions.
 *
 * HBS expressions like {{csrfToken}} and {{{appAvatar}}} are temporarily
 * replaced with safe placeholders before minification, then restored after.
 */
export declare function minifyHtmlWithHbsProtection(html: string): Promise<string>;
export interface HtmlOutputPluginOptions {
    /** Whether running in development mode */
    isDev: boolean;
    /** Output directory for built files */
    outDir: string;
}
/**
 * Vite plugin to handle HTML output:
 * 1. In production: fixes HTML output path (removes extra 'client' directory)
 * 2. In development: writes transformed HTML to disk for backend to serve
 */
export declare function htmlOutputPlugin(options: HtmlOutputPluginOptions): Plugin;
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