fix: Make sure the textfield is unfocused before opening the camera

lib/pages/chat.dart

@@ -290,7 +290,8 @@ class ChatController extends State<Chat> {
   }
 
   void openCameraAction() async {
-    inputFocus.unfocus();
+    // Make sure the textfield is unfocused before opening the camera
+    FocusScope.of(context).requestFocus(FocusNode());
     final file = await ImagePicker().getImage(source: ImageSource.camera);
     if (file == null) return;
     final bytes = await file.readAsBytes();