Refactor: Implement DashboardLayout, fix mobile nav, and resolve scroll issues

components/layout/Sidebar.tsx

@@ -8,6 +8,7 @@ import {
   Bell,
   Lightbulb,
   Settings,
+  TrendingUp,
   X,
 } from 'lucide-react';
 import Link from 'next/link';
@@ -22,6 +23,7 @@ interface SidebarProps {
 
 const navigationItems = [
   { name: 'Dashboard', href: '/', icon: LayoutDashboard },
+  { name: 'Ingresos', href: '/incomes', icon: TrendingUp },
   { name: 'Deudas', href: '/debts', icon: Wallet },
   { name: 'Tarjetas', href: '/cards', icon: CreditCard },
   { name: 'Presupuesto', href: '/budget', icon: PiggyBank },