Release v4.251.0

Added

• on change on a component that presents items (a board moving a card, a list changing a row) can now choose an action list by the item that changed, with block-form when and otherwise, exactly as on click, on double click and on select already do. item is the changed item with its new value in place, value the new value and previous the old one, so a command's inputs bind to the data (with talkId from item.talkId) the way a view binds to a view model.
• A new "Bind an item change to a command" section in the interactions documentation.

Changed

• Diagnostic PLAY0560 now names change among the triggers that admit alternatives. An opaque where on a change keeps working and is not deprecated (PLAY0564 still covers click, double click and select only).