feat: add admin statistics API endpoint and GeoMap component for scan visualization.

src/app/api/admin/stats/route.ts

@@ -2,6 +2,8 @@ import { NextRequest, NextResponse } from 'next/server';
 import { cookies } from 'next/headers';
 import { db } from '@/lib/db';
 
+export const dynamic = 'force-dynamic';
+
 export async function GET(request: NextRequest) {
   try {
     // Check newsletter-admin cookie authentication