/**
 * Branding stream URLs are HMAC-signed with a fresh `sig` + `exp` on every list mint.
 * Soft-refresh / focus refetch must not treat that as a new asset — remounting `<img>`
 * causes visible logo flicker on org pickers and login brand chrome.
 */
/**
 * Stable identity for a signed branding (or catalog) media URL — path + durable query
 * params (`galleryVersion`, `tenantId`, …), excluding `sig` / `exp`.
 */
export declare function brandingSignedMediaIdentity(url: string | null | undefined): string | null;
/**
 * When soft-refresh returns a newly signed URL for the same asset, keep the prior URL
 * so browsers keep the decoded image (no blank remount). Prefer `next` when identity differs
 * or there was no prior.
 */
export declare function preferStableBrandingMediaUrl(previous: string | null | undefined, next: string | null | undefined): string | null;
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