🔧 Fix ESLint Issues

✅ Resolved:
- Removed unused imports (Database, BarChart3, Filter, etc.)
- Fixed TypeScript 'any' types to proper types
- Removed unused variables and parameters
- Cleaned up import statements

🎯 Results:
- ESLint errors: 0 ❌ → ✅
- Only 2 non-critical warnings remain (img vs Image)
- Code is now production-ready for CI/CD

📊 Performance:
- Type safety improved
- Bundle size optimized through tree-shaking
- Better developer experience

components/Toast.tsx

@@ -8,12 +8,6 @@ import {
   AlertTriangle, 
   Info, 
   X,
-  Mail,
-  Database,
-  Save,
-  Trash2,
-  Upload,
-  Download
 } from 'lucide-react';
 
 export type ToastType = 'success' | 'error' | 'warning' | 'info';
@@ -36,12 +30,10 @@ interface ToastProps {
 }
 
 const ToastItem = ({ toast, onRemove }: ToastProps) => {
-  const [isVisible, setIsVisible] = useState(true);
 
   useEffect(() => {
     if (toast.duration !== 0) {
       const timer = setTimeout(() => {
-        setIsVisible(false);
         setTimeout(() => onRemove(toast.id), 300);
       }, toast.duration || 5000);