feat: add prisma support, admin panel and auth

app/admin/page.tsx

@@ -0,0 +1,44 @@
+import React from 'react';
+import { prisma } from '@/app/lib/prisma';
+
+export const dynamic = 'force-dynamic';
+
+export default async function AdminDashboard() {
+  const categoryCount = await prisma.category.count();
+  const itemCount = await prisma.item.count();
+  const restaurant = await prisma.restaurant.findFirst();
+
+  return (
+    <div className="admin-dashboard">
+      <div className="admin-page-header">
+        <h1>Dashboard</h1>
+        <p>Luna Cocktail & More - Menü Özeti</p>
+      </div>
+
+      <div className="stats-grid">
+        <div className="stat-card">
+          <div className="stat-label">Toplam Kategori</div>
+          <div className="stat-value">{categoryCount}</div>
+        </div>
+        <div className="stat-card">
+          <div className="stat-label">Toplam Ürün</div>
+          <div className="stat-value">{itemCount}</div>
+        </div>
+        <div className="stat-card">
+          <div className="stat-label">Restoran İsmi</div>
+          <div className="stat-value" style={{ fontSize: '1.2rem' }}>{restaurant?.name || 'Yükleniyor...'}</div>
+        </div>
+      </div>
+
+      <div className="admin-card">
+        <div className="card-header">
+          <h2 className="card-title">Hızlı İşlemler</h2>
+        </div>
+        <div style={{ padding: '2rem', display: 'flex', gap: '1rem' }}>
+          <button className="admin-btn">Yeni Kategori Ekle</button>
+          <button className="admin-btn">Yeni Ürün Ekle</button>
+        </div>
+      </div>
+    </div>
+  );
+}