Add dedicated local admin domain routing

app/_admin/smtp/page.tsx

@@ -5,6 +5,7 @@ import { AdminDashboardShell } from "@/components/admin/admin-dashboard-shell";
 import { SMTPSettingsForm } from "@/components/admin/smtp-settings-form";
 import { Button } from "@/components/ui/button";
 import { clearAdminSessionCookie, isAdminAuthenticated } from "@/lib/admin-auth";
+import { getAdminAppPath } from "@/lib/admin-routing";
 import { getMailSettingsFormValues } from "@/lib/app-config";
 
 import { saveMailSettingsAction, sendTestEmailAction } from "./actions";
@@ -28,14 +29,14 @@ const copy = {
 
 export default async function AdminSMTPPage() {
   if (!(await isAdminAuthenticated())) {
-    redirect("/");
+    redirect(getAdminAppPath("/"));
   }
 
   async function logoutAction() {
     "use server";
 
     await clearAdminSessionCookie();
-    redirect("/");
+    redirect(getAdminAppPath("/"));
   }
 
   const mailSettings = await getMailSettingsFormValues();