`:
+ * the host collapses it to its 64px rail (still peek-able) and renders the
+ * contextual sidebar here, yielding `[ rail 64px ][ secondary ~240px ][ content ]`.
+ *
+ * It is a dumb container — fixed `w-60`, full-height, non-shrinking, with a
+ * right border and its own vertical scroll — so callers just drop the
+ * contextual nav (or a plugin slot mount) inside as `children`.
+ */
+export function SecondarySidebar({
+ children,
+ className,
+}: {
+ children: ReactNode;
+ className?: string;
+}) {
+ return (
+
+ {children}
+
+ );
+}