feat: add executive kiosk dashboard for TV display

- Created /kiosk route with full-screen display
- Added API endpoints for stats and activity feed
- Built cycling KPI display with 12 metrics
- Added scrolling ticker for ticket activity
- Implemented UI-configurable cycle interval (3-15s, default 7s)
- Focus on critical tickets and business metrics
- Added navigation link from dashboard
- Dark theme optimized for TV viewing

app/dashboard/page.tsx

@@ -101,6 +101,14 @@ export default function DashboardPage() {
       color: 'blue',
       stats: `${stats.configurationItems.active} active items`
     },
+    {
+      title: 'Kiosk Display',
+      description: 'Full-screen executive dashboard for TV display',
+      href: '/kiosk',
+      icon: Activity,
+      color: 'blue',
+      stats: 'Live metrics display'
+    },
     {
       title: 'Sync Management',
       description: 'Synchronize data from external systems',