add submit

lib/core/widgets/flux_text_field.dart

@@ -11,6 +11,7 @@ class FluxTextField extends StatelessWidget {
   final TextInputType? keyboardType; // Aggiunto per flessibilità
   final int? minLines;
   final int? maxLines;
+  final Function(String)? onSubmitted;
 
   const FluxTextField({
     super.key, // Usiamo super.key per Flutter moderno
@@ -22,6 +23,7 @@ class FluxTextField extends StatelessWidget {
     this.keyboardType,
     this.minLines,
     this.maxLines = 1,
+    this.onSubmitted,
   });
 
   @override
@@ -56,6 +58,7 @@ class FluxTextField extends StatelessWidget {
           vertical: 16,
         ),
       ),
+      onSubmitted: onSubmitted,
     );
   }
 }