Application propre sans erreurs. Bonne base sur laquelle repartir de zero en cas de soucis majeurs.

lib/presentation/widgets/custom_button.dart

@@ -0,0 +1,17 @@
+import 'package:flutter/material.dart';
+
+class CustomButton extends StatelessWidget {
+  final String text;
+  final VoidCallback onPressed;
+
+  const CustomButton({super.key, required this.text, required this.onPressed});
+
+  @override
+  Widget build(BuildContext context) {
+    return ElevatedButton(
+      onPressed: onPressed,
+      child: Text(text),
+    );
+  }
+}
+