fix: add viewport export with 'initialScale: 1'

app/layout.tsx

@@ -1,4 +1,4 @@
-import type { Metadata } from "next";
+import type { Metadata, Viewport } from "next";
 import { Geist, Geist_Mono } from "next/font/google";
 import { headers } from "next/headers";
 import { getLocale } from "next-intl/server";
@@ -17,6 +17,11 @@ const geistMono = Geist_Mono({
   subsets: ["latin"],
 });
 
+export const viewport: Viewport = {
+  width: "device-width",
+  initialScale: 1,
+};
+
 export async function generateMetadata(): Promise<Metadata> {
   await configManager.ensureLoaded();
   const faviconUrl = configManager.get<string>("faviconUrl", "/branding/Bulwark_Favicon.svg");