Right now on the Featured Items page of the store if a game has Card support it has a sash over the top left corner that says 'Cards'. On your profile, the badges section is a list of all your games that have badge/card support.
But at the moment I don't see anything on the game Library page in any of the 3 views (Detail, List, or Grid) that has any indication of card/badge support.
Is there an individual marker in any Library view (similar to the Cloud in List view that shows Steam Cloud support) to see if a game has trading card support?