add text analyse en cours

covas_mobile/lib/pages/DisplayPictureScreen.dart

@@ -52,7 +52,10 @@ class DisplayPictureScreenState extends State<DisplayPictureScreen> {
         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(widget.imagePath)),
-    );
+        body: SingleChildScrollView(
+            child: Column(children: <Widget>[
+          Image.file(File(widget.imagePath)),
+          Text("Analyse en cours...")
+        ])));
   }
 }