feat: Controllo accessi RFID completo con gestione sessioni

- Aggiunto supporto multi-pattern RFID (US/IT layout)
- Implementata invalidazione sessioni al restart del server
- Schermata "badge non trovato" con countdown 30s
- Notifica quando badge validatore passato senza utente
- Database aggiornato con badge reali di test
- Layout ottimizzato per tablet orizzontale
- Banner NumLock per desktop
- Toggle visibilità password
- Carosello benvenuto multilingua (10 lingue)
- Pagina debug RFID (/debug)

frontend/src/screens/ErrorModal.tsx

@@ -3,70 +3,71 @@
  * Modal per errori
  */
 
-import { Modal, Button } from '../components';
+import {Button, Modal} from '../components';
 
 interface ErrorModalProps {
-  isOpen: boolean;
-  onClose: () => void;
-  title?: string;
-  message: string;
+    isOpen: boolean;
+    onClose: () => void;
+    title?: string;
+    message: string;
 }
 
 export function ErrorModal({
-  isOpen,
-  onClose,
-  title = 'Errore',
-  message
-}: ErrorModalProps) {
-  return (
-    <Modal
-      isOpen={isOpen}
-      onClose={onClose}
-      variant="error"
-      fullscreen
-    >
-      <div className="text-center text-white p-8 max-w-2xl">
-        {/* Error Icon */}
-        <div className="mb-8">
-          <div className="inline-flex items-center justify-center w-32 h-32 rounded-full bg-white/20 animate-pulse-error">
-            <svg
-              className="w-20 h-20 text-white"
-              fill="none"
-              viewBox="0 0 24 24"
-              stroke="currentColor"
-            >
-              <path
-                strokeLinecap="round"
-                strokeLinejoin="round"
-                strokeWidth={3}
-                d="M6 18L18 6M6 6l12 12"
-              />
-            </svg>
-          </div>
-        </div>
-
-        {/* Title */}
-        <h1 className="text-5xl md:text-6xl font-bold mb-6 animate-slide-up">
-          {title}
-        </h1>
-
-        {/* Error Message */}
-        <p className="text-2xl md:text-3xl opacity-90 mb-12 animate-fade-in">
-          {message}
-        </p>
-
-        {/* Close Button */}
-        <Button
-          variant="secondary"
-          size="lg"
-          onClick={onClose}
-          className="bg-white text-error hover:bg-gray-100"
+                               isOpen,
+                               onClose,
+                               title = 'Errore',
+                               message
+                           }: ErrorModalProps) {
+    return (
+        <Modal
+            isOpen={isOpen}
+            onClose={onClose}
+            variant="error"
+            fullscreen
         >
-          Chiudi
-        </Button>
-      </div>
-    </Modal>
-  );
+            <div className="text-center text-white p-8 max-w-2xl">
+                {/* Error Icon */}
+                <div className="mb-8">
+                    <div
+                        className="inline-flex items-center justify-center w-32 h-32 rounded-full bg-white/20 animate-pulse-error">
+                        <svg
+                            className="w-20 h-20 text-white"
+                            fill="none"
+                            viewBox="0 0 24 24"
+                            stroke="currentColor"
+                        >
+                            <path
+                                strokeLinecap="round"
+                                strokeLinejoin="round"
+                                strokeWidth={3}
+                                d="M6 18L18 6M6 6l12 12"
+                            />
+                        </svg>
+                    </div>
+                </div>
+
+                {/* Title */}
+                <h1 className="text-5xl md:text-6xl font-bold mb-6 animate-slide-up">
+                    {title}
+                </h1>
+
+                {/* Error Message */}
+                <p className="text-2xl md:text-3xl opacity-90 mb-12 animate-fade-in">
+                    {message}
+                </p>
+
+                {/* Close Button */}
+                <Button
+                    variant="secondary"
+                    size="lg"
+                    onClick={onClose}
+                    className="bg-white text-error hover:bg-gray-100"
+                >
+                    Chiudi
+                </Button>
+            </div>
+        </Modal>
+    );
 }
 
 export default ErrorModal;