Function safeJson

public/js/folderManager.js:62–73

(res)

   Helpers: safe JSON + state
----------------------*/
async function safeJson(res) {
  const text = await res.text();
  let body = null;
  try { body = text ? JSON.parse(text) : null; } catch (e) { /* ignore */ }
  if (!res.ok) {
    const msg = (body && (body.error || body.message)) || (text && text.trim()) || `HTTP ${res.status}`;
    const err = new Error(msg);
    err.status = res.status;
    throw err;
  }
  return body ?? {};
}

function disableAllFolderControls() {
  ['createFolderBtn','moveFolderBtn','renameFolderBtn','colorFolderBtn','deleteFolderBtn','shareFolderBtn']