type ButtonSurface = 'admin' | 'kiosk' | 'customer' | 'pickup';
export interface DatabaseUnavailableProps {
    nextRetryDelay?: number;
    isChecking?: boolean;
    onRetry?: () => void;
    /** Button styling — admin gate should pass `admin`, kiosk passes `kiosk`. */
    surface?: ButtonSurface;
}
/**
 * Shown when the backend /health check fails (API unreachable or not ready).
 * Copy is intentionally non-technical — end users, not operators.
 */
export declare function DatabaseUnavailable({ nextRetryDelay, isChecking, onRetry, surface, }: DatabaseUnavailableProps): JSX.Element;
/** Minimal boot splash while the first /health check is in flight. */
export declare function ServiceHealthBootScreen({ label, }: {
    readonly label?: string;
}): JSX.Element;
export {};
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