/**
 * Canonical Bearer auth-header builder for venue-calendar (R-AUTH-03).
 *
 * Doctrine: "One Bearer-header builder per app, used everywhere. All HTTP call
 * sites import this builder — no inline Bearer template literals." Every VC call
 * site that needs an `Authorization: Bearer <token>` header routes through here,
 * so the Bearer construction lives in exactly one place and any future
 * rename/format change has a single surface.
 *
 * Empty-token contract: when `token` is falsy (an unset operator token), the
 * `Authorization` value is the empty string — byte-identical to what the call
 * sites sent before migration (`token ? \`Bearer ${token}\` : ''`). The builder
 * preserves that shape; it does not drop the header or alter what an unset token
 * transmits.
 *
 * @stale-doc-comment-allow: Authorization
 * (`Authorization` is an HTTP header NAME, not a code entity. It exists here only
 * as an object key and a type-literal property — both of which stopped resolving
 * in vc#685, because a property key labels a slot rather than declaring a binding.
 * The header is real and external, which is exactly what the per-name hatch is
 * for; a file-level escape would blind the rest of this file.)
 */
export declare function buildAuthHeaders(token: string | undefined | null): {
    Authorization: string;
};