fix: match background to chat background color

Author: brandonmcconnell

typescript-sdk/apps/dojo/src/app/[integrationId]/feature/layout.tsx

@@ -58,7 +58,7 @@ export default function FeatureLayout({ children, params }: Props) {
   }, [children, codeFiles, readme, view])
 
   return (
-    <div className="bg-white rounded-lg w-full h-full overflow-hidden">
+    <div className="bg-(--copilot-kit-background-color) rounded-lg w-full h-full overflow-hidden">
       <div className="flex flex-col h-full overflow-auto">
         {content}
       </div>