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/sitemap.ts

@@ -53,20 +53,53 @@ export default function sitemap(): MetadataRoute.Sitemap {
   }));
 
   // Learn hub and pillar pages
-  const learnPages = [
-    {
-      url: `${baseUrl}/learn`,
+  const learnPages = [
+    {
+      url: `${baseUrl}/learn`,
       lastModified: new Date(),
       changeFrequency: 'weekly' as const,
       priority: 0.9,
     },
-    ...pillarMeta.map((pillar) => ({
-      url: `${baseUrl}/learn/${pillar.key}`,
-      lastModified: new Date(),
-      changeFrequency: 'monthly' as const,
-      priority: 0.8,
-    })),
-  ];
+    ...pillarMeta.map((pillar) => ({
+      url: `${baseUrl}/learn/${pillar.key}`,
+      lastModified: new Date(),
+      changeFrequency: 'monthly' as const,
+      priority: 0.8,
+    })),
+  ];
+
+  const growthUseCasePages = [
+    {
+      url: `${baseUrl}/use-cases`,
+      lastModified: new Date(),
+      changeFrequency: 'weekly' as const,
+      priority: 0.9,
+    },
+    {
+      url: `${baseUrl}/use-cases/restaurant-menu-qr-codes`,
+      lastModified: new Date(),
+      changeFrequency: 'monthly' as const,
+      priority: 0.8,
+    },
+    {
+      url: `${baseUrl}/use-cases/business-card-qr-codes`,
+      lastModified: new Date(),
+      changeFrequency: 'monthly' as const,
+      priority: 0.8,
+    },
+    {
+      url: `${baseUrl}/use-cases/event-qr-codes`,
+      lastModified: new Date(),
+      changeFrequency: 'monthly' as const,
+      priority: 0.8,
+    },
+    {
+      url: `${baseUrl}/qr-code-for-marketing-campaigns`,
+      lastModified: new Date(),
+      changeFrequency: 'monthly' as const,
+      priority: 0.85,
+    },
+  ];
 
   // Author pages
   const authorPages = authors.map((author) => ({
@@ -189,10 +222,11 @@ export default function sitemap(): MetadataRoute.Sitemap {
     },
 
 
-    ...toolPages,
-    ...blogPages,
-    ...learnPages,
-    ...authorPages,
-  ];
-}
+    ...toolPages,
+    ...blogPages,
+    ...learnPages,
+    ...growthUseCasePages,
+    ...authorPages,
+  ];
+}