fix favicon delivery and cache invalidation

app/layout.tsx

@@ -1,11 +1,17 @@
 import type { Metadata } from "next";
+import { unstable_noStore as noStore } from "next/cache";
 import { getLocale } from "next-intl/server";
 import { ThemeProvider } from "@/components/theme-provider";
 import { buildAppMetadata } from "@/lib/metadata";
 import { getDirection } from "@/lib/locale";
 import "./globals.css";
 
+export const dynamic = "force-dynamic";
+export const revalidate = 0;
+
 export async function generateMetadata(): Promise<Metadata> {
+  noStore();
+
   return buildAppMetadata();
 }
 
@@ -14,6 +20,8 @@ export default async function RootLayout({
 }: Readonly<{
   children: React.ReactNode;
 }>) {
+  noStore();
+
   const locale = await getLocale().catch(() => "de");
 
   return (