updated project style guidelines

lib/widget/clickableAppBar.dart

@@ -6,9 +6,7 @@ class ClickableAppBar extends StatelessWidget implements PreferredSizeWidget {
   const ClickableAppBar({required this.onTap, required this.appBar, super.key});
 
   @override
-  Widget build(BuildContext context) {
-    return GestureDetector(onTap: onTap, child: appBar);
-  }
+  Widget build(BuildContext context) => GestureDetector(onTap: onTap, child: appBar);
 
   @override
   Size get preferredSize => appBar.preferredSize;