separate cass displayscreenstate

covas_mobile/lib/pages/DisplayPictureScreen.dart

@@ -34,19 +34,25 @@ class MyApp extends StatelessWidget {
   }
 }
 
-// A widget that displays the picture taken by the user.
-class DisplayPictureScreen extends StatelessWidget {
+// A screen that allows users to take a picture using a given camera.
+class DisplayPictureScreen extends StatefulWidget {
   final String imagePath;
 
   const DisplayPictureScreen({super.key, required this.imagePath});
 
+  @override
+  DisplayPictureScreenState createState() => DisplayPictureScreenState();
+}
+
+// A widget that displays the picture taken by the user.
+class DisplayPictureScreenState extends State<DisplayPictureScreen> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(title: const Text('Display the Picture')),
       // The image is stored as a file on the device. Use the `Image.file`
       // constructor with the given path to display the image.
-      body: Image.file(File(imagePath)),
+      body: Image.file(File(widget.imagePath)),
     );
   }
 }