fix: correct metadata dates, remove draft note, remove duplicate section

- Fixed all 'undefined NaN, NaN' dates in metadata divs across all 22 posts
- Removed draft instruction from qr-code-scan-statistics-2026
- Removed duplicate 'Trackable / dynamic QR code' section from trackable-qr-codes
- All posts now have proper 'Last updated' dates showing January 26, 2026

src/lib/indexnow.ts

@@ -62,27 +62,27 @@ export function getAllIndexableUrls(): string[] {
     const blogPages = blogPosts.map(post => `${baseUrl}/blog/${post.slug}`);
 
     // Main pages (synced with sitemap.ts)
-    const mainPages = [
-        baseUrl,
-        `${baseUrl}/qr-code-erstellen`,
-        `${baseUrl}/qr-code-tracking`,
-        `${baseUrl}/reprint-calculator`,
-        `${baseUrl}/dynamic-qr-code-generator`,
-        `${baseUrl}/bulk-qr-code-generator`,
+    const mainPages = [
+        baseUrl,
+        `${baseUrl}/about`,
+        `${baseUrl}/contact`,
+        `${baseUrl}/press`,
+        `${baseUrl}/testimonials`,
+        `${baseUrl}/qr-code-erstellen`,
+        `${baseUrl}/qr-code-tracking`,
+        `${baseUrl}/reprint-calculator`,
+        `${baseUrl}/dynamic-qr-code-generator`,
+        `${baseUrl}/bulk-qr-code-generator`,
         `${baseUrl}/custom-qr-code-generator`,
-        `${baseUrl}/manage-qr-codes`,
-        `${baseUrl}/pricing`,
-        `${baseUrl}/tools`,
-        `${baseUrl}/features`,
-        `${baseUrl}/faq`,
-        `${baseUrl}/blog`,
-        `${baseUrl}/signup`,
-        `${baseUrl}/login`,
-        `${baseUrl}/privacy`,
-        `${baseUrl}/guide/tracking-analytics`,
-        `${baseUrl}/guide/bulk-qr-code-generation`,
-        `${baseUrl}/guide/qr-code-best-practices`,
-    ];
+        `${baseUrl}/manage-qr-codes`,
+        `${baseUrl}/pricing`,
+        `${baseUrl}/tools`,
+        `${baseUrl}/features`,
+        `${baseUrl}/faq`,
+        `${baseUrl}/blog`,
+        `${baseUrl}/privacy`,
+        `${baseUrl}/newsletter`,
+    ];
 
     // Learn hub and pillar pages
     const learnPages = [