link to the user's channel

[imaginator]

A username should link to their channel (currently mailto:)

[robotnic]

linky is in use
https://github.com/lgalfaso/angular.js/blob/03a9c020b1155e7b0b8d94969bb37901903b568b/src/ngSanitize/filter/linky.js

Not easy to fix. A bad fix could be a security issue.