Fix: Restore WhatsApp menu and fix groups menu

Reverts the WhatsApp menu item name change and addresses the non-functional groups menu.

src/App.tsx

@@ -1,3 +1,4 @@
+
 import { BrowserRouter as Router, Routes, Route, Navigate } from 'react-router-dom';
 import { Suspense, lazy } from 'react';
 import { Toaster } from "@/components/ui/sonner";

src/components/layout/Sidebar.tsx

@@ -113,10 +113,10 @@ export default function Sidebar({ isOpen, onClose }: SidebarProps) {
               onClick={isMobile ? onClose : undefined}
             >
               <MessageSquareText className="mr-2 h-4 w-4" />
-              <span>Enviar Mensagem</span>
+              <span>Conectar WhatsApp</span>
             </NavLink>
             <NavLink 
-              to="/gruposwhatsapp"
+              to="/grupos-whatsapp"
               className={({ isActive }) => getNavLinkClass(isActive)}
               onClick={isMobile ? onClose : undefined}
             >