Refactor controllers for better readability

**Feature request**
It would be great to have search for utils.

**Use case**
Many users need this functionality for production deployments.

**Implementation idea**
Add a new config option `enable_search` with default `false`.

The issue names controllers, utils, and an `enable_search` configuration option, but no files or tests. Start by locating those entry points and clarify whether the requested work is the controller readability refactor or the utility search feature. Done should be defined by the chosen scope, including the default `false` behavior if search is implemented.

Written by the indexing model from the issue text.