Show long user names when the short user name is the same as someone I follow

To avoid confusion, please consider showing the long user name if the short user name overlaps with someone I follow, but it's a different user.

Start by locating the UI entry point that renders user names and the logic that identifies accounts someone follows. Check how short names are displayed when accounts overlap; done means showing the long user name only when the short name conflicts with a followed account. No specific file or test is named in the issue.

Written by the indexing model from the issue text.