import type { Ref } from 'vue';
/**
 * The two cookies the UI preferences live in, owned by `@vuecs/locale` and
 * `@vuecs/design`. Spelled once here because three things read them: the refs
 * below, and `buildAuthorizeURL`, which defaults the `ui_locales` /
 * `ui_color_mode` hints from them.
 */
export declare const LOCALE_COOKIE = "vc-locale";
export declare const COLOR_MODE_COOKIE = "vc-color-mode";
/**
 * What each cookie holds while the visitor has chosen nothing: neither
 * switcher writes these, so a stored one means an explicit choice.
 */
export declare const LOCALE_UNSET = "auto";
export declare const COLOR_MODE_UNSET = "system";
export declare function readCookie(name: string): string | undefined;
/**
 * Cookie-backed ref for non-Nuxt consumers, the counterpart of
 * `useCookie()` in client-admin-console. Client-side writes persist back
 * to the cookie; server-side there is no `document`, so the caller seeds
 * the value through `initial` (the auth console reads the cookie in
 * `renderAuthConsolePage` and hands it over via the hydration payload).
 */
/**
 * The visitor's stored choice, or nothing when they have made none. The
 * no-choice sentinel is not a value worth carrying anywhere: the authup pages
 * resolve it from the same browser this one is running in, so it would say
 * nothing they do not already know.
 */
export declare function readPreferenceCookie(name: string, unset: string): string | undefined;
export declare function createCookieRef(name: string, initial?: string, fallback?: string): Ref<string>;
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