fix(seo): improve meta tags and JSON-LD for eval product pages

- Add unique seoDesc field to each eval product (≤155 chars)
- EvalDetailPage: use seoDesc for description, add Evaluation to
  title, add SoftwareApplication JSON-LD alongside breadcrumb
- EvalPage: add ItemList JSON-LD for the listing page

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

frontend/src/data/evalProducts.ts

@@ -4,6 +4,7 @@ export interface EvalProductConfig {
   version: string
   build: string
   description: string
+  seoDesc: string   // ≤155 chars, for <meta name="description"> and og:description
   archs: string[]
   type: 'server' | 'enterprise'
   requirements: {
@@ -20,6 +21,7 @@ export const evalProducts: EvalProductConfig[] = [
     name: 'Windows Server 2025',
     version: 'Standard / Datacenter',
     build: 'Latest evaluation build',
+    seoDesc: 'Download Windows Server 2025 evaluation ISO from Microsoft. 180-day trial. Direct CDN link — no registration required.',
     description:
       'The latest Windows Server release featuring enhanced security, hybrid cloud capabilities, and improved performance. Includes SMB over QUIC, credential guard improvements, and delegated managed service accounts.',
     archs: ['x64'],
@@ -35,6 +37,7 @@ export const evalProducts: EvalProductConfig[] = [
     name: 'Windows Server 2022',
     version: 'Standard / Datacenter',
     build: 'Latest evaluation build',
+    seoDesc: 'Download Windows Server 2022 evaluation ISO from Microsoft. Long-term servicing channel. 180-day trial. Direct CDN link, no registration.',
     description:
       'Long-term servicing channel release with Secured-core server support, TLS 1.3 by default, and DNS-over-HTTPS. The recommended choice for new server infrastructure evaluation.',
     archs: ['x64'],
@@ -50,6 +53,7 @@ export const evalProducts: EvalProductConfig[] = [
     name: 'Windows Server 2019',
     version: 'Standard / Datacenter',
     build: '17763',
+    seoDesc: 'Download Windows Server 2019 evaluation ISO from Microsoft. Includes Defender ATP and Storage Migration Service. 180-day trial, direct CDN link.',
     description:
       'Stable and widely deployed. Includes Windows Defender Advanced Threat Protection, Storage Migration Service, and System Insights. Ideal for existing infrastructure evaluation.',
     archs: ['x64'],
@@ -65,6 +69,7 @@ export const evalProducts: EvalProductConfig[] = [
     name: 'Windows Server 2016',
     version: 'Standard / Datacenter',
     build: '14393',
+    seoDesc: 'Download Windows Server 2016 evaluation ISO from Microsoft. Supports Nano Server, Storage Spaces Direct, and Windows Containers. 180-day trial.',
     description:
       'Legacy server release with Nano Server, Storage Spaces Direct, and Windows Containers support. Suitable for older environment compatibility testing.',
     archs: ['x64'],
@@ -80,6 +85,7 @@ export const evalProducts: EvalProductConfig[] = [
     name: 'Windows 11 Enterprise',
     version: 'Evaluation',
     build: 'Latest evaluation build',
+    seoDesc: 'Download Windows 11 Enterprise evaluation ISO from Microsoft. Includes BitLocker, Defender for Endpoint, and Intune management. 180-day trial.',
     description:
       'Full enterprise feature set including Windows Hello for Business, BitLocker, Microsoft Defender for Endpoint integration, and advanced management via Intune and Group Policy.',
     archs: ['x64'],

frontend/src/pages/EvalDetailPage.tsx

@@ -85,8 +85,8 @@ export default function EvalDetailPage() {
   const primaryLink = links[0] ?? null
   const otherLinks = links.slice(1)
 
-  const pageTitle = `${product.name} ISO Download | Windows ISO Downloader`
-  const pageDesc = `Download ${product.name} evaluation ISO directly from Microsoft. ${product.description}`
+  const pageTitle = `${product.name} Evaluation ISO Download | Windows ISO Downloader`
+  const pageDesc = product.seoDesc
   const canonical = `${SITE_URL}/product/${product.slug}`
 
   const breadcrumbJsonLd = {
@@ -99,6 +99,17 @@ export default function EvalDetailPage() {
     ],
   }
 
+  const softwareJsonLd = {
+    '@context': 'https://schema.org',
+    '@type': 'SoftwareApplication',
+    name: `${product.name} Evaluation`,
+    operatingSystem: 'Windows',
+    applicationCategory: 'OperatingSystem',
+    url: canonical,
+    description: product.seoDesc,
+    offers: { '@type': 'Offer', price: '0', priceCurrency: 'USD' },
+  }
+
   return (
     <>
       <title>{pageTitle}</title>
@@ -108,6 +119,7 @@ export default function EvalDetailPage() {
       <meta property="og:description" content={pageDesc} />
       <meta property="og:url" content={canonical} />
       <script type="application/ld+json" dangerouslySetInnerHTML={{ __html: JSON.stringify(breadcrumbJsonLd) }} />
+      <script type="application/ld+json" dangerouslySetInnerHTML={{ __html: JSON.stringify(softwareJsonLd) }} />
 
       <div className="max-w-xl mx-auto px-5 pt-12 pb-10">
         {/* Back */}

frontend/src/pages/EvalPage.tsx

@@ -5,6 +5,19 @@ import { evalProducts } from '../data/evalProducts'
 
 const SITE_URL = 'https://msdl.tech-latest.com'
 
+const itemListJsonLd = {
+  '@context': 'https://schema.org',
+  '@type': 'ItemList',
+  name: 'Windows Server & Enterprise Evaluation ISOs',
+  description: 'Official evaluation ISOs for Windows Server and Enterprise editions, direct from Microsoft.',
+  itemListElement: evalProducts.map((p, i) => ({
+    '@type': 'ListItem',
+    position: i + 1,
+    name: p.name,
+    url: `${SITE_URL}/product/${p.slug}`,
+  })),
+}
+
 const typeColors = {
   server: 'text-violet-400 bg-violet-500/10 border-violet-500/20',
   enterprise: 'text-blue-400 bg-blue-500/10 border-blue-500/20',
@@ -34,6 +47,7 @@ export default function EvalPage() {
       <meta property="og:title" content="Enterprise & Server ISOs | Windows ISO Downloader" />
       <meta property="og:description" content="Download Windows Server and Enterprise evaluation ISOs directly from Microsoft's CDN." />
       <meta property="og:url" content={`${SITE_URL}/eval`} />
+      <script type="application/ld+json" dangerouslySetInnerHTML={{ __html: JSON.stringify(itemListJsonLd) }} />
 
       <div className="max-w-4xl mx-auto px-5 pt-12 pb-10">
         <motion.div