Add Business Tracker spreadsheet link

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

src/app/page.tsx

@@ -15,6 +15,7 @@ const whyratingLinks = [
   { name: 'Templates Site', url: 'http://templates.nuc.lan', icon: 'layout', description: 'WhyRating email and document templates' },
   { name: 'Outline Docs', url: 'http://192.168.1.3:3080', icon: 'file-text', description: 'Project documentation and notes' },
   { name: 'Gmail', url: 'https://mail.google.com/mail/?authuser=info@whyrating.com', icon: 'mail', description: 'info@whyrating.com business email' },
+  { name: 'Business Tracker', url: 'https://docs.google.com/spreadsheets/d/1ZCfS5GysnoSq__WN2dXKUag8hc89hlLnzQBtpBgubXc/edit?gid=0#gid=0', icon: 'table', description: 'Business tracking spreadsheet' },
   { name: 'Snappymail', url: 'http://nuc.lan:8082', icon: 'mail', description: 'Self-hosted email client' },
 ];