Fix admin page Database import error

- Add missing Database icon import from lucide-react
- Resolves 'Database is not defined' error in production /admin page
- Build passes successfully

Author: sirjamesgray

app/admin/page.tsx

@@ -11,7 +11,7 @@ import { Checkbox } from '../components/ui/checkbox';
 import { Switch } from '../components/ui/switch';
 
 import { SwipeableTabs, SwipeableTabsList, SwipeableTabsTrigger, SwipeableTabsContent } from '../components/ui/swipeable-tabs';
-import { Search, Users, Settings, Loader, Check, X, Shield, RefreshCw, Smartphone, ChevronLeft, ChevronRight, BarChart3, DollarSign, Eye, Palette } from 'lucide-react';
+import { Search, Users, Settings, Loader, Check, X, Shield, RefreshCw, Smartphone, ChevronLeft, ChevronRight, BarChart3, DollarSign, Eye, Palette, Database } from 'lucide-react';
 import { db } from "../firebase/config";
 import { collection, query, where, getDocs, doc, updateDoc, getDoc, setDoc } from 'firebase/firestore';
 import { useToast } from '../components/ui/use-toast';