import type { SuperagentUser } from '../types';
/**
 * The signed-in user's avatar URL, derived from the host-injected `/me` object.
 * Prefers the explicit `profile_image_url`, then the common Google OAuth image
 * fields (`picture` / `photo` / `avatar_url`), and finally `null`. Whitespace-only
 * values are treated as absent. Kept as a pure helper so the runtime never has to
 * take a pre-computed avatar prop — it derives it from `user` directly.
 */
export declare function getUserProfileImageUrl(user?: SuperagentUser | null): string | null;
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