export function isTerminalFocused(): boolean {  const activeElement = document.activeElement;  if (!(activeElement instanceof HTMLElement)) return false;  if (!activeElement.isConnected) return false;  if (activeElement.classList.contains("xterm-helper-textarea")) return true;  if (activeElement.closest(".thread-terminal-drawer .xterm") !== null) return true;  // Sidebar / toolbar / resize affordances: still "terminal UI" for split vs diff.toggle (⌘D).  return activeElement.closest(".thread-terminal-drawer") !== null;}