/** Why a company ID can't be used, or undefined when it can. */
export declare function companyIdProblem(id: string): "format" | "reserved" | undefined;
/** "ZUS Coffee (KL)" → "zus-coffee-kl"; empty when the name has no usable letters. */
export declare function suggestCompanyId(name: string): string;
export declare const MAX_EMAIL_DOMAINS = 20;
/** " @Example.com " → "example.com" */
export declare function normalizeEmailDomain(domain: string): string;
export declare function isEmailDomain(domain: string): boolean;
/** One domain per row as typed → what to save: blank rows dropped, repeats kept once. */
export declare function cleanEmailDomains(rows: string[]): string[];
/** Saved domains → rows to edit, with one empty row when there are none. */
export declare function emailDomainRows(domains: string[] | undefined): string[];
export declare function formatEmailDomains(domains: string[] | undefined): string;
/** The portal link a staff message uses; the login page leads with this provider. */
export declare function staffSignInLink(slug: string, origin?: string): string;