feat: Implement user signup API and analytics dashboard with summary API, map, and chart components, updating dependencies.

src/app/api/analytics/summary/route.ts

@@ -190,6 +190,13 @@ export async function GET(request: NextRequest) {
       return acc;
     }, {} as Record<string, number>);
 
+    // Generate last 7 days for sparkline
+    const last7Days = Array.from({ length: 7 }, (_, i) => {
+      const date = new Date();
+      date.setDate(date.getDate() - (6 - i));
+      return date.toISOString().split('T')[0];
+    });
+
     // QR performance (only show DYNAMIC QR codes since STATIC don't track scans)
     const qrPerformance = qrCodes
       .filter(qr => qr.type === 'DYNAMIC')
@@ -204,6 +211,18 @@ export async function GET(request: NextRequest) {
         // Calculate trend
         const trendData = calculateTrend(currentTotal, previousTotal);
 
+        // Calculate sparkline data (scans per day for last 7 days)
+        const sparklineData = last7Days.map(date => {
+          return qr.scans.filter(s =>
+            new Date(s.ts).toISOString().split('T')[0] === date
+          ).length;
+        });
+
+        // Find last scanned date
+        const lastScanned = qr.scans.length > 0
+          ? new Date(Math.max(...qr.scans.map(s => new Date(s.ts).getTime())))
+          : null;
+
         return {
           id: qr.id,
           title: qr.title,
@@ -215,6 +234,8 @@ export async function GET(request: NextRequest) {
             : 0,
           trend: trendData.trend,
           trendPercentage: trendData.percentage,
+          sparkline: sparklineData,
+          lastScanned: lastScanned?.toISOString() || null,
           ...(trendData.isNew && { isNew: true }),
         };
       })