Changes

Card UI is the main feature of smart screen. It comprised of smart system, smart home, app deck, device deck, tv deck, settings app, browser app, and dashboard app. Bookmarks or short-cuts in smart home are '''CARDs'''. All decks has the ability to create a card to smart-home app. All decks and apps are normal app in smart-system app. Their relationships can be found as the following figure:

== Smart Home ==

Smart home app is the default home app which hosts decks and cards. Smart home app is the owner of cards data store. It creates a card while a deck sends a '''mozActivity''' to smart home. And all decks will listen the change event or read the cards record of data store to determine if their cards are already created.