- Introduced a new `pageLayout` field in the user settings schema to allow for top-level layout configurations.
- Refactored the user settings manager to handle `pageLayout` separately from default settings, ensuring proper data structure during updates.
- Updated normalization functions to accommodate the new `pageLayout` field, enhancing the overall user settings management.
- Added tests to verify the correct handling of `pageLayout` updates, ensuring that it is written at the top level and not under defaults.