- Move leftSidebarMode from URL state to local useState in unified-shell,
avoiding force-dynamic router round-trip that made the button appear broken - Replace fileURLToPath(new URL(..., import.meta.url)) with process.cwd()
in bb-pi-bootstrap.ts — import.meta.url is a webpack:// URL in Next.js,
causing cross-realm TypeError when passed to Node.js fileURLToPath()
