feat: initial commit - finanzas app

Complete personal finance management application with:
- Dashboard with financial metrics and alerts
- Credit card management and payments
- Fixed and variable debt tracking
- Monthly budget planning
- Intelligent alert system
- Responsive design with Tailwind CSS

Tech stack: Next.js 14, TypeScript, Zustand, Recharts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

app/budget/page.tsx

@@ -0,0 +1,27 @@
+'use client'
+
+import { Sidebar, Header, MobileNav } from '@/components/layout'
+import { BudgetSection } from '@/components/budget'
+import { useSidebar } from '@/app/providers'
+import { useAlerts } from '@/components/alerts'
+
+export default function BudgetPage() {
+  const { isOpen, close, toggle } = useSidebar()
+  const { unreadCount } = useAlerts()
+
+  return (
+    <div className="flex min-h-screen bg-slate-950">
+      <Sidebar isOpen={isOpen} onClose={close} unreadAlertsCount={unreadCount} />
+
+      <div className="flex-1 flex flex-col min-h-screen">
+        <Header onMenuClick={toggle} title="Presupuesto" />
+
+        <main className="flex-1 p-4 md:p-6 lg:p-8 pb-20">
+          <BudgetSection />
+        </main>
+
+        <MobileNav unreadAlertsCount={unreadCount} />
+      </div>
+    </div>
+  )
+}