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const SHARED_INBOX_RETURN_TO_KEY = "blandSharedInboxReturnTo";
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export function getSharedInboxReturnTo(state: unknown): string | null {
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  if (!state || typeof state !== "object") return null;
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  const returnTo = (state as Record<string, unknown>)[SHARED_INBOX_RETURN_TO_KEY];
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  if (typeof returnTo !== "string" || !returnTo.startsWith("/")) {
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    return null;
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  }
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  return returnTo;
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}
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export function withSharedInboxReturnTo(state: unknown, href: string): Record<string, unknown> {
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  const base = state && typeof state === "object" ? (state as Record<string, unknown>) : {};
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  return { ...base, [SHARED_INBOX_RETURN_TO_KEY]: href };
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}