Customize a CometChat React UI Kit integration beyond what `cometchat init` and `cometchat apply-feature` produce — custom message bubbles, custom header views, custom subtitle views, custom empty/loading states, custom action menus, request builder filters, event listeners, and component compositio
Customize a CometChat React UI Kit integration beyond what `cometchat init` and `cometchat apply-feature` produce — custom message bubbles, custom header views, custom subtitle views, custom empty/loading states, custom action menus, request builder filters, event listeners, and component composition. Picks up where the framework skills end (after Phase A init succeeds).