chore: clean up scratch files and apply remaining updates

app/[locale]/layout.tsx

@@ -8,6 +8,7 @@ import { routing } from '@/i18n/routing';
 import { headers } from 'next/headers';
 import Navbar from '@/components/Navbar';
 import Footer from '@/components/Footer';
+import { SITE_URL, buildAlternates, ogLocale } from '@/lib/seo';
 import "../globals.css";
 
 const unbounded = Unbounded({
@@ -28,16 +29,55 @@ const ibmPlexMono = IBM_Plex_Mono({
   weight: ["400", "500"],
 });
 
-export const metadata: Metadata = {
-  title: "Marmaris Local — Yerel Rehber",
-  description: "Marmaris'in en iyi yerel mekanları, restoranları ve saklı apart otelleri.",
-  manifest: "/manifest.json",
-};
-
 export function generateStaticParams() {
   return routing.locales.map((locale) => ({locale}));
 }
 
+export async function generateMetadata({
+  params
+}: {
+  params: Promise<{ locale: string }>
+}): Promise<Metadata> {
+  const { locale } = await params
+  const headersList = await headers();
+  const pathname = headersList.get('x-pathname') || `/${locale}`;
+
+  const title =
+    locale === 'en'
+      ? 'Marmaris Local — Local Guide, Not the Tourist Trail'
+      : locale === 'ru'
+        ? 'Marmaris Local — Местный гид по Мармарису'
+        : 'Marmaris Local — Yerel Rehber';
+
+  const description =
+    locale === 'en'
+      ? "Marmaris' best local spots — restaurants, apart hotels and businesses, curated and locally approved."
+      : locale === 'ru'
+        ? 'Лучшие места Мармариса — рестораны, апарт-отели и заведения, проверенные местными жителями.'
+        : "Marmaris'in en iyi yerel mekanları, restoranları ve saklı apart otelleri.";
+
+  return {
+    title,
+    description,
+    metadataBase: new URL(SITE_URL),
+    manifest: '/manifest.json',
+    alternates: buildAlternates(pathname),
+    openGraph: {
+      title,
+      description,
+      url: `${SITE_URL}${pathname}`,
+      siteName: 'Marmaris Local',
+      locale: ogLocale(locale),
+      type: 'website',
+    },
+    twitter: {
+      card: 'summary_large_image',
+      title,
+      description,
+    },
+  };
+}
+
 export default async function RootLayout({
   children,
   params