Function flatten

scripts/sync-settings-keys.js:29–37

(obj, prefix = "")

}

function flatten(obj, prefix = "") {
  const out = {};
  for (const [k, v] of Object.entries(obj || {})) {
    const key = prefix ? `${prefix}.${k}` : k;
    if (isObject(v)) Object.assign(out, flatten(v, key));
    else out[key] = v;
  }
  return out;
}

function mergeWithCanonical(cn, target) {
  const result = Array.isArray(cn) ? [] : {};