Contato não atualiza na lista

Fiz o passo a passo do aula porem, não estou conseguindo fazer com que o contato seja salvo na lista, ja tentei solucionar mudando em 'contacts_list.dart' Stateless para Stateful e em floatingActionButton adicionar o setSate, porem nada deu certo.

import 'package:flutter/material.dart';
import 'package:projeto2/database/app_database.dart';
import 'package:projeto2/models/contact.dart';
import 'package:projeto2/srceens/contact_from.dart';

class ContactsList extends StatefulWidget {
  const ContactsList({Key? key}) : super(key: key);

  @override
  State<ContactsList> createState() => _ContactsListState();
}

class _ContactsListState extends State<ContactsList> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Contacts'),
      ),
      // inserido generics no FutureBuilder
      body: FutureBuilder<List<Contact>>(
        initialData: const [],
        future: findAll(),
        builder: (context, snapshot) {
          switch (snapshot.connectionState) {
            case ConnectionState.none:
              break;

            case ConnectionState.waiting:
              return Center(
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  crossAxisAlignment: CrossAxisAlignment.center,
                  children: const [
                    CircularProgressIndicator(),
                    Text('Loading'),
                  ],
                ),
              );

            case ConnectionState.active:
              break;

            case ConnectionState.done:
              final List<Contact>? contacts = snapshot
                  .data; // usado null safe na lista pois é regra da nova versão do flutter
              if (contacts != null) {
                //feito if para validar nulo
                return ListView.builder(
                  itemBuilder: (context, index) {
                    final Contact contact = contacts[index];
                    return _ContactItem(contact);
                  },
                  itemCount: contacts.length,
                );
              }
              break;
          }
          return Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.center,
              children: const [
                Text('Unknown error',
                    style: TextStyle(color: Colors.red, fontSize: 24.0)),
              ],
            ),
          );
        },
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          Navigator.of(context)
              .push(
                  MaterialPageRoute(builder: (context) => const ContactForm()))
              .then((value) {
            setState(() {
              widget.createState();
            });
          });
        },
        child: const Icon(
          Icons.add,
        ),
      ),
    );
  }
}

class _ContactItem extends StatelessWidget {
  final Contact contact;

  const _ContactItem(this.contact);

  @override
  Widget build(BuildContext context) {
    return Card(
      child: ListTile(
        title: Text(
          contact.name,
          style: const TextStyle(fontSize: 24.0),
        ),
        subtitle: Text(
          contact.accountNumber.toString(),
          style: const TextStyle(fontSize: 16.0),
        ),
      ),
    );
  }
}

https://github.com/Pedro-Balestra/SegundoProjeto_CursoAlura/commit/ef9766b59f2bb6c874c62a9c394b436f7db67cba