feat: comprehensive SEO system with keywords and schema markup

- Add 4-locale keyword configurations (SR, EN, DE, FR)
- Create schema generators (Product, Organization, Breadcrumb)
- Add React components for JSON-LD rendering
- Implement caching for keyword performance
- Abstract all SEO logic for maintainability

src/components/seo/JsonLd.tsx

@@ -0,0 +1,39 @@
+import Script from 'next/script';
+import { SchemaType } from '@/lib/seo/schema/types';
+
+interface JsonLdProps {
+  data: SchemaType | SchemaType[];
+}
+
+/**
+ * React component to render JSON-LD schema markup
+ * Uses Next.js Script component for proper loading
+ * 
+ * @param data - Single schema object or array of schemas
+ * @returns Script component with JSON-LD
+ * @example
+ * <JsonLd data={productSchema} />
+ * <JsonLd data={[productSchema, breadcrumbSchema]} />
+ */
+export function JsonLd({ data }: JsonLdProps) {
+  // Handle single schema or array
+  const schemas = Array.isArray(data) ? data : [data];
+  
+  return (
+    <>
+      {schemas.map((schema, index) => (
+        <Script
+          key={index}
+          id={`json-ld-${index}`}
+          type="application/ld+json"
+          strategy="afterInteractive"
+          dangerouslySetInnerHTML={{
+            __html: JSON.stringify(schema),
+          }}
+        />
+      ))}
+    </>
+  );
+}
+
+export default JsonLd;

src/components/seo/OrganizationSchema.tsx

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+import { JsonLd } from './JsonLd';
+import { generateOrganizationSchema, generateWebSiteSchema } from '@/lib/seo/schema/organizationSchema';
+import { Locale } from '@/lib/seo/keywords/types';
+
+interface OrganizationSchemaProps {
+  baseUrl: string;
+  locale: Locale;
+  logoUrl: string;
+  socialProfiles?: string[];
+  email?: string;
+}
+
+/**
+ * Organization schema component
+ * Renders Organization + WebSite JSON-LD schemas
+ * 
+ * @param baseUrl - Site base URL
+ * @param locale - Current locale
+ * @param logoUrl - URL to organization logo
+ * @param socialProfiles - Array of social media profile URLs
+ * @param email - Contact email
+ */
+export function OrganizationSchema({
+  baseUrl,
+  locale,
+  logoUrl,
+  socialProfiles,
+  email,
+}: OrganizationSchemaProps) {
+  const orgSchema = generateOrganizationSchema(baseUrl, locale, {
+    logoUrl,
+    socialProfiles,
+    email,
+  });
+
+  const websiteSchema = generateWebSiteSchema(baseUrl, locale);
+
+  return <JsonLd data={[orgSchema, websiteSchema]} />;
+}
+
+export default OrganizationSchema;

src/components/seo/ProductSchema.tsx

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+import { JsonLd } from './JsonLd';
+import { generateProductSchema, generateCategorizedProductSchema } from '@/lib/seo/schema/productSchema';
+import { generateProductBreadcrumbs } from '@/lib/seo/schema/breadcrumbSchema';
+import { Locale } from '@/lib/seo/keywords/types';
+
+interface ProductSchemaProps {
+  baseUrl: string;
+  locale: Locale;
+  product: {
+    name: string;
+    slug: string;
+    description: string;
+    images: string[];
+    price: {
+      amount: number;
+      currency: string;
+    };
+    sku?: string;
+    availability?: 'InStock' | 'OutOfStock' | 'PreOrder';
+  };
+  category?: 'antiAging' | 'hydration' | 'glow' | 'sensitive' | 'natural' | 'organic';
+  rating?: {
+    value: number;
+    count: number;
+  };
+  includeBreadcrumbs?: boolean;
+}
+
+/**
+ * Product schema component
+ * Renders Product + BreadcrumbList JSON-LD schemas
+ * 
+ * @param baseUrl - Site base URL
+ * @param locale - Current locale
+ * @param product - Product data object
+ * @param category - Optional category for enhanced targeting
+ * @param rating - Optional aggregate rating data
+ * @param includeBreadcrumbs - Whether to include breadcrumb schema (default: true)
+ */
+export function ProductSchema({
+  baseUrl,
+  locale,
+  product,
+  category,
+  rating,
+  includeBreadcrumbs = true,
+}: ProductSchemaProps) {
+  // Generate product schema
+  const productSchema = category
+    ? generateCategorizedProductSchema(baseUrl, locale, { ...product, rating }, category)
+    : generateProductSchema(baseUrl, locale, { ...product, rating });
+
+  // Generate breadcrumbs if requested
+  if (includeBreadcrumbs) {
+    const breadcrumbSchema = generateProductBreadcrumbs(
+      baseUrl,
+      locale,
+      product.name,
+      product.slug
+    );
+    return <JsonLd data={[productSchema, breadcrumbSchema]} />;
+  }
+
+  return <JsonLd data={productSchema} />;
+}
+
+export default ProductSchema;

src/components/seo/index.ts

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+/**
+ * SEO React Components
+ * Structured data and metadata components
+ */
+
+// Schema components
+export { JsonLd } from './JsonLd';
+export { OrganizationSchema } from './OrganizationSchema';
+export { ProductSchema } from './ProductSchema';