T146666 creates a Commons extension moving files there, given a url. This task is about providing a link in Wikipedia to move files.
Add a link "Move to Commons" to the tab bar, when the page is a "real" wikipedia file page, i.e. the page of an image that is really just on Wikipedia, not on Commons.
When the link is clicked, the file is moved to Commons with the Commons extension of T146666.
Background: This task is part of fulfilling a wish of the German-speaking community's technical wishlist of 2013. For details, see the parent task.