The commit refactors the server-side modules of the Roxy-WI web interface to use JSON-based APIs for improved data exchange. Specifically, methods for user, group and SSH management have been updated to accept and return JSON data. Simultaneously, error handling is improved to give more informative responses instead of plain strings. The client-side JavaScript code is also refactored to accommodate these changes. Additionally, some minor corrections are made in the UI templates.
This commit streamlines the way user group data is handled, both in scripts and server-side logic. The group settings URL has been simplified and the logic for updating user groups also has been optimized. Eliminated unnecessary checks in the user.py module, and updated the routing logic for group data to utilize a single route with HTTP GET and PUT methods. Removed unsuccessful group changing errors.