possibility to react to all items in player view

Users should be able to react to all items in the player view. This will add interactivity and make the interface more interesting.

Other affordances, such as commenting, rating, adding to favourites, or discussing an item with a chatbot, could also be interesting additions in the player view.

Start by locating the player view entry point and reviewing how items are currently rendered and interacted with. Clarify which item types must support reactions and what existing reaction behavior should be reused; done means the agreed set of player-view items can be reacted to consistently.

Written by the indexing model from the issue text.