Initialize Stage 0: Next.js 16 scaffold with auth and role-based routing

- Next.js 16.2.2 + React 19 + TypeScript + Tailwind v4
- Better Auth with email/password and role system (student/curator/admin)
- Prisma 7 schema: User, Session, Account, Verification + full LMS model
- Role-based dashboards: student /dashboard, curator /curator/dashboard, admin /admin/dashboard
- Auth pages: login, register, verify-email
- Better Auth API route handler
- Middleware for route protection
- Docker Compose with PostgreSQL 16
- Seed script with test users (admin/curator/student)
- CLAUDE.md and ROADMAP.md project documentation

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/admin/dashboard/page.tsx

@@ -0,0 +1,46 @@
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { LogoutButton } from "@/components/layout/logout-button";
+
+export default async function AdminDashboard() {
+  const session = await auth.api.getSession({ headers: await headers() });
+
+  if (!session) redirect("/login");
+  if (session.user.role !== "admin") redirect("/dashboard");
+
+  return (
+    <div className="min-h-screen bg-slate-50">
+      <header className="bg-white border-b border-slate-200 px-6 py-4 flex items-center justify-between">
+        <h1 className="text-xl font-bold text-slate-900">Second Brain — Админ</h1>
+        <div className="flex items-center gap-4">
+          <span className="text-sm text-gray-600">{session.user.name}</span>
+          <LogoutButton />
+        </div>
+      </header>
+      <main className="max-w-5xl mx-auto px-6 py-10">
+        <h2 className="text-2xl font-semibold text-gray-800 mb-2">
+          Панель администратора
+        </h2>
+        <p className="text-gray-500 mb-8">Управление платформой Second Brain.</p>
+        <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
+          <div className="bg-white rounded-2xl border border-slate-200 p-6">
+            <p className="text-3xl mb-2">📚</p>
+            <p className="font-medium text-gray-800">Курсы</p>
+            <p className="text-sm text-gray-400 mt-1">CRUD — Этап 1</p>
+          </div>
+          <div className="bg-white rounded-2xl border border-slate-200 p-6">
+            <p className="text-3xl mb-2">👥</p>
+            <p className="font-medium text-gray-800">Пользователи</p>
+            <p className="text-sm text-gray-400 mt-1">Управление — Этап 1</p>
+          </div>
+          <div className="bg-white rounded-2xl border border-slate-200 p-6">
+            <p className="text-3xl mb-2">📊</p>
+            <p className="font-medium text-gray-800">Аналитика</p>
+            <p className="text-sm text-gray-400 mt-1">Этап 10</p>
+          </div>
+        </div>
+      </main>
+    </div>
+  );
+}