Function safeJson

public/js/fileListView.js:4387–4402

(res)

   ----------------------------- */
// Parse JSON if possible; throw on non-2xx with useful message & status
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 normalizeFolderPath(folder) {
  if (!folder) return "";