OptionalcomponentKey used to look up the Angular component in the componentMap
(defaults to the component's @Component.selector, e.g. 'app-chart').
OptionalpropsSerialized props forwarded to the component via ComponentRef.setInput().
OptionalsubConfiguration for nested sub-grids
Extended GridStackWidget interface for Angular integration. Matches the React/Vue convention:
componentidentifies the widget type,propscarries the data passed to it (via ComponentRef.setInput()).