fix: Adjust SidebarGroup visibility and reduce experimental throttle for chat functionality

components/chat-sidebar.tsx

@@ -245,7 +245,7 @@ export function ChatSidebar() {
                 
                 <SidebarGroup className="flex-shrink-0 invisible">
                     <SidebarGroupLabel className={cn(
-                        "px-4 pt-0 text-xs font-medium text-muted-foreground/80 uppercase tracking-wider",
+                        "px-2 pt-0 text-xs font-medium text-muted-foreground/80 uppercase tracking-wider",
                         isCollapsed ? "sr-only" : ""
                     )}>
                         MCP Servers

components/chat.tsx

@@ -123,7 +123,7 @@ export default function Chat() {
         chatId: chatId || generatedChatId, // Use generated ID if no chatId in URL
         userId,
       },
-      experimental_throttle: 500,
+      experimental_throttle: 75,
       onFinish: () => {
         // Invalidate the chats query to refresh the sidebar
         if (userId) {