Add dedicated local admin domain routing

app/_admin/site-settings/actions.ts

@@ -14,7 +14,7 @@ import {
   SITE_SETTINGS_LOGO_LIGHT_FIELD_KEY,
   updateSiteSettings,
 } from "@/lib/app-config";
-import { toInternalAdminPath } from "@/lib/admin-routing";
+import { getAdminAppPath, toInternalAdminPath } from "@/lib/admin-routing";
 import { PAGE_TITLE_TOKEN, type SiteSettings } from "@/lib/site-settings";
 import { clearAdminSessionCookie, isAdminAuthenticated } from "@/lib/admin-auth";
 import { replaceEntityMediaUsages } from "@/lib/media";
@@ -28,7 +28,7 @@ import { prisma } from "@/lib/prisma";
 async function ensureAdmin() {
   if (!(await isAdminAuthenticated())) {
     await clearAdminSessionCookie();
-    redirect("/");
+    redirect(getAdminAppPath("/"));
   }
 }
 
@@ -278,7 +278,7 @@ export async function saveSiteSettingsAction(formData: FormData) {
     });
 
     await revalidateSiteSettingsPages();
-    redirect(withMessage("/site-settings", "success", "Einstellungen gespeichert."));
+    redirect(withMessage(getAdminAppPath("/site-settings"), "success", "Einstellungen gespeichert."));
   } catch (error) {
     if (isRedirectError(error)) {
       throw error;
@@ -291,6 +291,6 @@ export async function saveSiteSettingsAction(formData: FormData) {
         ? error.message
         : "Einstellungen konnten nicht gespeichert werden.";
 
-    redirect(withMessage("/site-settings", "error", message));
+    redirect(withMessage(getAdminAppPath("/site-settings"), "error", message));
   }
 }

app/_admin/site-settings/page.tsx

@@ -5,6 +5,7 @@ import { MotionFade } from "@/components/motion-fade";
 import { SiteSettingsForm } from "@/components/admin/site-settings-form";
 import { AdminDashboardShell } from "@/components/admin/admin-dashboard-shell";
 import { clearAdminSessionCookie, isAdminAuthenticated } from "@/lib/admin-auth";
+import { getAdminAppPath } from "@/lib/admin-routing";
 import {
   getSiteSettings,
   getSiteSettingsMediaBindings,
@@ -31,14 +32,14 @@ const copy = {
 
 export default async function AdminSiteSettingsPage() {
   if (!(await isAdminAuthenticated())) {
-    redirect("/");
+    redirect(getAdminAppPath("/"));
   }
 
   async function logoutAction() {
     "use server";
 
     await clearAdminSessionCookie();
-    redirect("/");
+    redirect(getAdminAppPath("/"));
   }
 
   const [siteSettings, mediaBindings, mediaOptions] = await Promise.all([