Update React Editor integration and clean up template

components/ai-elements/message.tsx

@@ -202,7 +202,6 @@ export const MessageBranchContent = ({
     [children]
   );
 
-  // Use useEffect to update branches when they change
   useEffect(() => {
     if (branches.length !== childrenArray.length) {
       setBranches(childrenArray);
@@ -231,7 +230,6 @@ export const MessageBranchSelector = ({
 }: MessageBranchSelectorProps) => {
   const { totalBranches } = useMessageBranch();
 
-  // Don't render if there's only one branch
   if (totalBranches <= 1) {
     return null;
   }
@@ -317,7 +315,6 @@ export const MessageBranchPage = ({
 
 export type MessageResponseProps = ComponentProps<typeof Markdown>;
 
-// Markdown already memoises on children/isAnimating.
 export const MessageResponse = Markdown;
 
 export type MessageToolbarProps = ComponentProps<"div">;