SEO: Fix structured data validation errors, delete static sitemap, and update indexing scripts

src/lib/schema.ts

@@ -62,7 +62,7 @@ export function organizationSchema() {
       '@type': 'ContactPoint',
       contactType: 'Customer Support',
       email: 'support@qrmaster.net',
-      availableLanguage: ['English', 'German'],
+      availableLanguage: ['en', 'de'],
     },
     description: 'B2B SaaS platform for dynamic QR code generation with analytics, branding, and bulk generation for enterprise marketing campaigns.',
     slogan: 'Dynamic QR codes that work smarter',
@@ -88,6 +88,7 @@ export function organizationSchema() {
             name: 'QR Master Free',
             applicationCategory: 'BusinessApplication',
             operatingSystem: 'Web Browser',
+            image: 'https://www.qrmaster.net/static/og-image.png',
           },
         },
         {
@@ -97,6 +98,7 @@ export function organizationSchema() {
             name: 'QR Master Pro',
             applicationCategory: 'BusinessApplication',
             operatingSystem: 'Web Browser',
+            image: 'https://www.qrmaster.net/static/og-image.png',
           },
         },
       ],