feat: integrate SEO system into pages

- Add OrganizationSchema to root layout
- Add ProductSchema with metadata to product pages
- Add enhanced metadata to homepage with keywords
- Add enhanced metadata to products listing page
- Add noindex to checkout page via layout
- Implement canonical URLs, OpenGraph, and Twitter cards

src/app/[locale]/page.tsx

@@ -12,15 +12,49 @@ import ProblemSection from "@/components/home/ProblemSection";
 import HowItWorks from "@/components/home/HowItWorks";
 import { getPageMetadata } from "@/lib/i18n/pageMetadata";
 import { isValidLocale, DEFAULT_LOCALE, getSaleorLocale, type Locale } from "@/lib/i18n/locales";
+import { getPageKeywords, getBrandKeywords } from "@/lib/seo/keywords";
+import { Metadata } from "next";
 
-export async function generateMetadata({ params }: { params: Promise<{ locale: string }> }) {
+const baseUrl = process.env.NEXT_PUBLIC_SITE_URL || "https://dev.manoonoils.com";
+
+export async function generateMetadata({ params }: { params: Promise<{ locale: string }> }): Promise<Metadata> {
   const { locale } = await params;
   const validLocale = isValidLocale(locale) ? locale : DEFAULT_LOCALE;
   const metadata = getPageMetadata(validLocale as Locale);
+  const keywords = getPageKeywords(validLocale as Locale, 'home');
+  const brand = getBrandKeywords(validLocale as Locale);
   setRequestLocale(validLocale);
+  
+  // Build canonical URL
+  const localePrefix = validLocale === DEFAULT_LOCALE ? "" : `/${validLocale}`;
+  const canonicalUrl = `${baseUrl}${localePrefix || '/'}`;
+  
   return {
     title: metadata.home.title,
     description: metadata.home.description,
+    keywords: [...keywords.primary, ...keywords.secondary].join(', '),
+    alternates: {
+      canonical: canonicalUrl,
+    },
+    openGraph: {
+      title: metadata.home.title,
+      description: metadata.home.description,
+      type: 'website',
+      url: canonicalUrl,
+      images: [{
+        url: `${baseUrl}/og-image.jpg`,
+        width: 1200,
+        height: 630,
+        alt: brand.tagline,
+      }],
+      locale: validLocale,
+    },
+    twitter: {
+      card: 'summary_large_image',
+      title: metadata.home.title,
+      description: metadata.home.description,
+      images: [`${baseUrl}/og-image.jpg`],
+    },
   };
 }