Adjust padding in CustomNavigationBar

- Add vertical minimum padding to SafeArea
- Remove bottom padding in bottomNavigationBar
- replaced left/right padding in bottomNavigationBar with EdgeInsets.symmetric
- removed bottom padding from bottomNavigationBar

lib/presentation/views/main_menu/custom_navigation_bar.dart

@@ -32,6 +32,7 @@ class _CustomNavigationBarState extends State<CustomNavigationBar>
   @override
   Widget build(BuildContext context) {
     return SafeArea(
+      minimum: EdgeInsets.symmetric(vertical: 30),
       child: Scaffold(
         appBar: AppBar(
           centerTitle: true,
@@ -56,7 +57,7 @@ class _CustomNavigationBarState extends State<CustomNavigationBar>
         body: tabs[currentIndex],
         extendBody: true,
         bottomNavigationBar: Padding(
-          padding: const EdgeInsets.only(left: 12.0, right: 12.0, bottom: 18.0),
+          padding: const EdgeInsets.symmetric(horizontal: 12.0),
           child: Material(
             elevation: 10,
             borderRadius: BorderRadius.circular(24),