basic login implementation at localhost:3000//login

apps/public-web/app/(site)/admin/page.tsx

@@ -0,0 +1,38 @@
+import { redirect } from "next/navigation";
+import { cookies } from "next/headers";
+
+export default async function AdminPage() {
+    const cookieHeader = (await cookies())
+        .getAll()
+        .map(({ name, value }) => `${name}=${value}`)
+        .join("; ");
+
+    const res = await fetch(`${process.env.BACKEND_URL}/api/me`, {
+        headers: { cookie: cookieHeader },
+        cache: "no-store",
+        redirect: "manual", // IMPORTANT: don’t follow to /login
+    });
+
+    // Spring might answer 302 to /login when unauthenticated
+    if (res.status === 401 || res.status === 302) redirect("/login");
+
+    if (!res.ok) {
+        const text = await res.text();
+        throw new Error(`Failed to load session: ${res.status} ${text.slice(0, 200)}`);
+    }
+
+    const contentType = res.headers.get("content-type") ?? "";
+    if (!contentType.includes("application/json")) {
+        // we got HTML (login page) or something else
+        redirect("/login");
+    }
+
+    const me = await res.json();
+
+    return (
+        <main>
+            <h1>Admin</h1>
+            <pre>{JSON.stringify(me, null, 2)}</pre>
+        </main>
+    );
+}