feat(auth): restrict admin access to verified Google email

app/admin/login/page.tsx

@@ -0,0 +1,20 @@
+import { redirect } from "next/navigation";
+import { connection } from "next/server";
+
+import { LoginCard } from "@/components/admin/login-card";
+import { SiteHeader } from "@/components/public/site-header";
+import { getAdminSession } from "@/lib/auth/server";
+
+export default async function AdminLoginPage() {
+  await connection();
+  if (await getAdminSession()) redirect("/admin");
+
+  return (
+    <div className="min-h-svh">
+      <SiteHeader />
+      <main className="grid min-h-[calc(100svh-4rem)] place-items-center px-4 py-12">
+        <LoginCard />
+      </main>
+    </div>
+  );
+}

app/api/auth/[...all]/route.ts

@@ -0,0 +1,11 @@
+import { toNextJsHandler } from "better-auth/next-js";
+
+import { getAuth } from "@/lib/auth/server";
+
+const handlers = toNextJsHandler((request) => getAuth().handler(request));
+
+export const GET = handlers.GET;
+export const POST = handlers.POST;
+export const PATCH = handlers.PATCH;
+export const PUT = handlers.PUT;
+export const DELETE = handlers.DELETE;