const KEY = "context.sidebar";

/** The rail or the full sidebar, as the clinician last chose; wide screens start full. */
export function readCollapsed(): boolean {
  try {
    const saved = localStorage.getItem(KEY);
    if (saved === "rail" || saved === "full") return saved === "rail";
  } catch {
    // Storage can be blocked (private windows); fall back to the screen width.
  }
  try {
    return !window.matchMedia("(min-width: 1280px)").matches;
  } catch {
    return false;
  }
}

export function saveCollapsed(collapsed: boolean) {
  try {
    localStorage.setItem(KEY, collapsed ? "rail" : "full");
  } catch {
    // Not saved: the choice lasts until the page reloads.
  }
}