Initial fullstack project setup with Next.js 15, Gin, PostgreSQL and Docker Compose

- Frontend: Next.js 15 (App Router), Auth.js v5, shadcn/ui, MagicUI
- Backend: Go + Gin + GORM with layered architecture
- Auth: Local credentials login with optional Keycloak OAuth binding
- Admin: RBAC user management for admin role
- Dev: Docker Compose with hot reload for both frontend and backend
- Docker: 3-service orchestration (frontend, backend, postgres)

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

frontend/app/(main)/dashboard/page.tsx

@@ -0,0 +1,32 @@
+import { auth } from "@/auth";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+
+export default async function DashboardPage() {
+  const session = await auth();
+  const user = session?.user as any;
+
+  return (
+    <div className="space-y-4">
+      <h1 className="text-2xl font-bold">欢迎，{user?.name || user?.email}</h1>
+      <Card>
+        <CardHeader>
+          <CardTitle>用户信息</CardTitle>
+        </CardHeader>
+        <CardContent className="space-y-2 text-sm">
+          <p>
+            <span className="font-medium">用户名：</span>
+            {user?.name}
+          </p>
+          <p>
+            <span className="font-medium">邮箱：</span>
+            {user?.email}
+          </p>
+          <p>
+            <span className="font-medium">角色：</span>
+            {user?.role}
+          </p>
+        </CardContent>
+      </Card>
+    </div>
+  );
+}