export declare function renderTemplate(template: string, context?: Record<string, any>): string;
/**
 * Return a render context where the named `html`-typed custom user properties
 * (`context.user.<field>`) are wrapped in `Handlebars.SafeString`, so a plain
 * `{{user.field}}` renders the stored markup unescaped (parity with the disclosure
 * HTML the field type is for) without authors needing triple-mustache.
 *
 * - Non-mutating: shallow-clones `context` and `context.user` only when a wrap happens,
 *   so the persisted `canvas.context` is never touched (a `SafeString` would corrupt it
 *   on save / JSON-serialize). The wrapped values live only in the transient render context.
 * - Sanitized here before wrapping (defense-in-depth): values are also sanitized on input
 *   (admin UI + CSV), but server-side write paths (SSO sync, direct API PATCH) bypass that,
 *   and marking a value `SafeString` makes it render as trusted HTML — so re-sanitize at the
 *   point we declare it safe. Idempotent on already-clean markup.
 */
type RenderContext = {
    user?: Record<string, unknown>;
} & Record<string, unknown>;
export declare function withSafeHtmlUserProps(context?: RenderContext, htmlFieldNames?: string[]): RenderContext;
export interface CustomHandlebarsHelper {
    name: string;
    code: string;
    description?: string;
}
/**
 * Register a single custom Handlebars helper from code string
 * @param helper - The helper definition with name and code
 * @returns true if registration succeeded, false otherwise
 */
export declare function registerCustomHelper(helper: CustomHandlebarsHelper): boolean;
/**
 * Register multiple custom Handlebars helpers
 * @param helpers - Array of helper definitions
 * @returns Object with counts of successful and failed registrations
 */
export declare function registerCustomHelpers(helpers: CustomHandlebarsHelper[]): {
    registered: number;
    failed: number;
};
/**
 * Load and register custom Handlebars helpers from installed apps
 * Looks for the "handlebars-helpers" app and registers helpers from its metadata
 * @param installedApps - Array of installed app files
 * @returns Object with counts of successful and failed registrations
 */
export declare function loadCustomHelpersFromApps(installedApps: Array<{
    app_metadata?: {
        name?: string;
    };
    metadata?: Record<string, any>;
}>): {
    registered: number;
    failed: number;
};
export {};