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/app/(main)/(marketing)/qr-code-tracking/page.tsx

@@ -1,11 +1,13 @@
 import React from 'react';
 import type { Metadata } from 'next';
-import Link from 'next/link';
-import { Button } from '@/components/ui/Button';
-import { Card } from '@/components/ui/Card';
-import SeoJsonLd from '@/components/SeoJsonLd';
-import Breadcrumbs, { BreadcrumbItem } from '@/components/Breadcrumbs';
-import { breadcrumbSchema } from '@/lib/schema';
+import { Button } from '@/components/ui/Button';
+import { Card } from '@/components/ui/Card';
+import SeoJsonLd from '@/components/SeoJsonLd';
+import Breadcrumbs, { BreadcrumbItem } from '@/components/Breadcrumbs';
+import { breadcrumbSchema } from '@/lib/schema';
+import { GrowthLinksSection } from '@/components/marketing/GrowthLinksSection';
+import { MarketingPageTracker, TrackedCtaLink } from '@/components/marketing/MarketingAnalytics';
+import { featuredUseCases } from '@/lib/growth-pages';
 
 export const metadata: Metadata = {
   title: {
@@ -164,15 +166,43 @@ export default function QRCodeTrackingPage() {
     ],
   };
 
-  const breadcrumbItems: BreadcrumbItem[] = [
-    { name: 'Home', url: '/' },
-    { name: 'QR Code Tracking', url: '/qr-code-tracking' },
-  ];
-
-  return (
-    <>
-      <SeoJsonLd data={[softwareSchema, howToSchema, breadcrumbSchema(breadcrumbItems)]} />
-      <div className="min-h-screen bg-white">
+  const breadcrumbItems: BreadcrumbItem[] = [
+    { name: 'Home', url: '/' },
+    { name: 'QR Code Tracking', url: '/qr-code-tracking' },
+  ];
+
+  const relatedUseCaseLinks = [
+    {
+      href: featuredUseCases[2].href,
+      title: featuredUseCases[2].title,
+      description: featuredUseCases[2].summary,
+      ctaLabel: featuredUseCases[2].ctaLabel,
+    },
+    {
+      href: '/qr-code-for-marketing-campaigns',
+      title: 'QR Codes for Marketing Campaigns',
+      description: 'Map scans to campaign placements, creative tests, and offline-to-online attribution.',
+      ctaLabel: 'Create a trackable campaign QR',
+    },
+    {
+      href: featuredUseCases[0].href,
+      title: featuredUseCases[0].title,
+      description: featuredUseCases[0].summary,
+      ctaLabel: featuredUseCases[0].ctaLabel,
+    },
+    {
+      href: '/use-cases',
+      title: 'Explore the use-case hub',
+      description: 'Browse the first commercial workflows built around dynamic updates and measurable scans.',
+      ctaLabel: 'Explore QR code use cases',
+    },
+  ];
+
+  return (
+    <>
+      <SeoJsonLd data={[softwareSchema, howToSchema, breadcrumbSchema(breadcrumbItems)]} />
+      <MarketingPageTracker pageType="commercial" cluster="qr-tracking" />
+      <div className="min-h-screen bg-white">
         {/* Hero Section */}
         <section className="relative overflow-hidden bg-gradient-to-br from-blue-50 via-white to-purple-50 py-20">
           <div className="container mx-auto px-4 sm:px-6 lg:px-8 max-w-7xl">
@@ -190,20 +220,20 @@ export default function QRCodeTrackingPage() {
 
                 <p className="text-xl text-gray-600 leading-relaxed">
                   Monitor your QR code performance in real-time. Get detailed insights on location, device, time, and user behavior. Make data-driven decisions with our free tracking software.
-                </p>
-
-                <div className="flex flex-col sm:flex-row gap-4">
-                  <Link href="/signup">
-                    <Button size="lg" className="text-lg px-8 py-4 w-full sm:w-auto">
-                      Start Tracking Free
-                    </Button>
-                  </Link>
-                  <Link href="/signup">
-                    <Button variant="outline" size="lg" className="text-lg px-8 py-4 w-full sm:w-auto">
-                      Create Trackable QR Code
-                    </Button>
-                  </Link>
-                </div>
+                </p>
+
+                <div className="flex flex-col sm:flex-row gap-4">
+                  <TrackedCtaLink href="/signup" ctaLabel="Start Tracking Free" ctaLocation="hero_primary" pageType="commercial" cluster="qr-tracking">
+                    <Button size="lg" className="text-lg px-8 py-4 w-full sm:w-auto">
+                      Start Tracking Free
+                    </Button>
+                  </TrackedCtaLink>
+                  <TrackedCtaLink href="/signup" ctaLabel="Create Trackable QR Code" ctaLocation="hero_secondary" pageType="commercial" cluster="qr-tracking">
+                    <Button variant="outline" size="lg" className="text-lg px-8 py-4 w-full sm:w-auto">
+                      Create Trackable QR Code
+                    </Button>
+                  </TrackedCtaLink>
+                </div>
 
                 <div className="flex items-center space-x-6 text-sm text-gray-600">
                   <div className="flex items-center space-x-2">
@@ -212,13 +242,13 @@ export default function QRCodeTrackingPage() {
                     </svg>
                     <span>No credit card required</span>
                   </div>
-                  <div className="flex items-center space-x-2">
-                    <svg className="w-5 h-5 text-green-500" fill="currentColor" viewBox="0 0 20 20">
-                      <path fillRule="evenodd" d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z" clipRule="evenodd" />
-                    </svg>
-                    <span>Unlimited scans</span>
-                  </div>
-                </div>
+                  <div className="flex items-center space-x-2">
+                    <svg className="w-5 h-5 text-green-500" fill="currentColor" viewBox="0 0 20 20">
+                      <path fillRule="evenodd" d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z" clipRule="evenodd" />
+                    </svg>
+                    <span>Placement-ready reports</span>
+                  </div>
+                </div>
               </div>
 
               {/* Analytics Preview */}
@@ -227,20 +257,20 @@ export default function QRCodeTrackingPage() {
                   <h3 className="font-semibold text-lg mb-4">Live Analytics Dashboard</h3>
                   <div className="space-y-4">
                     <div className="flex justify-between items-center pb-3 border-b">
-                      <span className="text-gray-600">Total Scans</span>
-                      <span className="text-2xl font-bold text-primary-600">12,547</span>
+                      <span className="text-gray-600">Placement view</span>
+                      <span className="text-base font-semibold text-primary-600">Flyer vs booth vs table card</span>
                     </div>
                     <div className="flex justify-between items-center pb-3 border-b">
-                      <span className="text-gray-600">Unique Users</span>
-                      <span className="text-2xl font-bold text-primary-600">8,392</span>
+                      <span className="text-gray-600">Time trend</span>
+                      <span className="text-base font-semibold text-primary-600">Lunch, event day, or campaign burst</span>
                     </div>
                     <div className="flex justify-between items-center pb-3 border-b">
-                      <span className="text-gray-600">Top Location</span>
-                      <span className="font-semibold">🇩🇪 Germany</span>
+                      <span className="text-gray-600">Location context</span>
+                      <span className="font-semibold">Region and city level view</span>
                     </div>
                     <div className="flex justify-between items-center">
-                      <span className="text-gray-600">Top Device</span>
-                      <span className="font-semibold">📱 iPhone</span>
+                      <span className="text-gray-600">Device context</span>
+                      <span className="font-semibold">Phone, desktop, and scan mix</span>
                     </div>
                   </div>
                 </Card>
@@ -318,9 +348,9 @@ export default function QRCodeTrackingPage() {
         </section>
 
         {/* Comparison Table */}
-        <section className="py-20 bg-gray-50">
-          <div className="container mx-auto px-4 sm:px-6 lg:px-8 max-w-5xl">
-            <div className="text-center mb-16">
+        <section className="py-20 bg-gray-50">
+          <div className="container mx-auto px-4 sm:px-6 lg:px-8 max-w-5xl">
+            <div className="text-center mb-16">
               <h2 className="text-4xl font-bold text-gray-900 mb-4">
                 QR Master vs Free Tools
               </h2>
@@ -364,33 +394,42 @@ export default function QRCodeTrackingPage() {
                   ))}
                 </tbody>
               </table>
-            </Card>
-          </div>
-        </section>
-
-        {/* CTA Section */}
-        <section className="py-20 bg-gradient-to-r from-primary-600 to-purple-600 text-white">
-          <div className="container mx-auto px-4 sm:px-6 lg:px-8 max-w-4xl text-center">
-            <h2 className="text-4xl font-bold mb-6">
-              Start Tracking Your QR Codes Today
-            </h2>
-            <p className="text-xl mb-8 text-primary-100">
-              Join thousands of businesses using QR Master to track and optimize their QR code campaigns
-            </p>
-            <div className="flex flex-col sm:flex-row gap-4 justify-center">
-              <Link href="/signup">
-                <Button size="lg" variant="secondary" className="text-lg px-8 py-4 w-full sm:w-auto bg-white text-primary-600 hover:bg-gray-100">
-                  Create Free Account
-                </Button>
-              </Link>
-              <Link href="/pricing">
-                <Button size="lg" variant="outline" className="text-lg px-8 py-4 w-full sm:w-auto border-white text-white hover:bg-white/10">
-                  View Pricing
-                </Button>
-              </Link>
-            </div>
-          </div>
-        </section>
+            </Card>
+          </div>
+        </section>
+
+        <GrowthLinksSection
+          eyebrow="Tracking-led workflows"
+          title="Where scan visibility matters most"
+          description="These are the workflows where scan context, placement comparison, and destination flexibility make QR tracking materially more useful."
+          links={relatedUseCaseLinks}
+          pageType="commercial"
+          cluster="qr-tracking"
+        />
+
+        {/* CTA Section */}
+        <section className="py-20 bg-gradient-to-r from-primary-600 to-purple-600 text-white">
+          <div className="container mx-auto px-4 sm:px-6 lg:px-8 max-w-4xl text-center">
+            <h2 className="text-4xl font-bold mb-6">
+              Start Tracking Your QR Codes Today
+            </h2>
+            <p className="text-xl mb-8 text-primary-100">
+              Measure scans with enough context to improve the next placement, campaign, or printed workflow.
+            </p>
+            <div className="flex flex-col sm:flex-row gap-4 justify-center">
+              <TrackedCtaLink href="/signup" ctaLabel="Create Free Account" ctaLocation="footer_primary" pageType="commercial" cluster="qr-tracking">
+                <Button size="lg" variant="secondary" className="text-lg px-8 py-4 w-full sm:w-auto bg-white text-primary-600 hover:bg-gray-100">
+                  Create Free Account
+                </Button>
+              </TrackedCtaLink>
+              <TrackedCtaLink href="/pricing" ctaLabel="View Pricing" ctaLocation="footer_secondary" pageType="commercial" cluster="qr-tracking">
+                <Button size="lg" variant="outline" className="text-lg px-8 py-4 w-full sm:w-auto border-white text-white hover:bg-white/10">
+                  View Pricing
+                </Button>
+              </TrackedCtaLink>
+            </div>
+          </div>
+        </section>
       </div>
     </>
   );