fix: resolve TypeScript errors in migrated components

apps/web/src/components/chat/MessageList.tsx

@@ -45,7 +45,7 @@ export function MessageList({ messages, isLoading, loadingQuip }: MessageListPro
         <MessageBubble key={message.id} message={message} />
       ))}
 
-      {isLoading && <LoadingIndicator quip={loadingQuip} />}
+      {isLoading && <LoadingIndicator {...(loadingQuip != null && { quip: loadingQuip })} />}
     </div>
   );
 }