feat: implement dashboard page for QR code listing, statistics, and management.

src/app/(app)/dashboard/page.tsx

@@ -41,6 +41,7 @@ export default function DashboardPage() {
     totalScans: 0,
     activeQRCodes: 0,
     conversionRate: 0,
+    uniqueScans: 0,
   });
   const [analyticsData, setAnalyticsData] = useState<any>(null);
 
@@ -218,13 +219,15 @@ export default function DashboardPage() {
           // Calculate real stats
           const totalScans = data.reduce((sum: number, qr: QRCodeData) => sum + (qr.scans || 0), 0);
           const activeQRCodes = data.filter((qr: QRCodeData) => qr.status === 'ACTIVE').length;
-          // Calculate "Unique Rate" (Conversion)
-          const conversionRate = totalScans > 0 ? Math.round((data.reduce((acc: number, qr: any) => acc + (qr.uniqueScans || 0), 0) / totalScans) * 100) : 0;
+          // Calculate unique scans (absolute count)
+          const uniqueScans = data.reduce((acc: number, qr: any) => acc + (qr.uniqueScans || 0), 0);
+          const conversionRate = totalScans > 0 ? Math.round((uniqueScans / totalScans) * 100) : 0;
 
           setStats({
             totalScans,
             activeQRCodes,
             conversionRate,
+            uniqueScans,
           });
         } else {
           // If not logged in, show zeros
@@ -233,6 +236,7 @@ export default function DashboardPage() {
             totalScans: 0,
             activeQRCodes: 0,
             conversionRate: 0,
+            uniqueScans: 0,
           });
         }
 
@@ -256,6 +260,7 @@ export default function DashboardPage() {
           totalScans: 0,
           activeQRCodes: 0,
           conversionRate: 0,
+          uniqueScans: 0,
         });
       } finally {
         setLoading(false);
@@ -317,6 +322,7 @@ export default function DashboardPage() {
           totalScans: 0,
           activeQRCodes: 0,
           conversionRate: 0,
+          uniqueScans: 0,
         });
         showToast(`Successfully deleted ${data.deletedCount} QR code${data.deletedCount !== 1 ? 's' : ''}`, 'success');
       } else {

src/app/api/qrs/route.ts

@@ -20,6 +20,10 @@ export async function GET(request: NextRequest) {
         _count: {
           select: { scans: true },
         },
+        scans: {
+          where: { isUnique: true },
+          select: { id: true },
+        },
       },
       orderBy: { createdAt: 'desc' },
     });
@@ -28,6 +32,7 @@ export async function GET(request: NextRequest) {
     const transformed = qrCodes.map(qr => ({
       ...qr,
       scans: qr._count.scans,
+      uniqueScans: qr.scans.length, // Count of scans where isUnique=true
       _count: undefined,
     }));
 
@@ -138,9 +143,9 @@ export async function POST(request: NextRequest) {
         );
       }
     }
-    
+
     let enrichedContent = body.content;
-    
+
     // For STATIC QR codes, calculate what the QR should contain
     if (isStatic) {
       let qrContent = '';
@@ -180,7 +185,7 @@ END:VCARD`;
         default:
           qrContent = body.content.url || 'https://example.com';
       }
-      
+
       // Add qrContent to the content object
       enrichedContent = {
         ...body.content,

src/components/dashboard/StatsGrid.tsx

@@ -11,6 +11,7 @@ interface StatsGridProps {
     totalScans: number;
     activeQRCodes: number;
     conversionRate: number;
+    uniqueScans?: number;
   };
   trends?: {
     totalScans?: TrendData;
@@ -67,13 +68,13 @@ export const StatsGrid: React.FC<StatsGridProps> = ({ stats, trends }) => {
       ),
     },
     {
-      title: 'Unique Scan Rate',
-      value: `${stats.conversionRate}%`,
-      change: stats.totalScans > 0 ? `${stats.conversionRate}% new users` : 'No scans yet',
-      changeType: stats.conversionRate > 0 ? 'positive' : 'neutral' as 'positive' | 'negative' | 'neutral',
+      title: 'Unique Users',
+      value: formatNumber(stats.uniqueScans ?? 0),
+      change: stats.totalScans > 0 ? `${stats.uniqueScans ?? 0} unique visitors` : 'No scans yet',
+      changeType: (stats.uniqueScans ?? 0) > 0 ? 'positive' : 'neutral' as 'positive' | 'negative' | 'neutral',
       icon: (
         <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13 7h8m0 0v8m0-8l-8 8-4-4-6 6" />
+          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M17 20h5v-2a3 3 0 00-5.356-1.857M17 20H7m10 0v-2c0-.656-.126-1.283-.356-1.857M7 20H2v-2a3 3 0 015.356-1.857M7 20v-2c0-.656.126-1.283.356-1.857m0 0a5.002 5.002 0 019.288 0M15 7a3 3 0 11-6 0 3 3 0 016 0z" />
         </svg>
       ),
     },