attendence login/logout has been implemented

lib/presentation/screens/main_screen.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/material.dart';
 import '../widgets/app_background.dart';
-import '../../widgets/floatingnavbar.dart';
+import '../widgets/FloatingNavBar.dart';
 import 'attendence_screen.dart';
 import 'finance_screen.dart';
 import 'holiday_screen.dart';
@@ -15,20 +15,17 @@ class MainPage extends StatefulWidget {
 class _MainPageState extends State<MainPage> {
   int _currentIndex = 0;
 
-
-
   @override
   Widget build(BuildContext context) {
-    final screenHeight = MediaQuery.sizeOf(context).height;
+    // final screenHeight = MediaQuery.sizeOf(context).height;
     return Scaffold(
       body: Stack(
         children: [
- 
           /// BACKGROUND
           const AppBackground(child: SizedBox()),
 
           /// ACTIVE SCREEN (fills entire screen - content will extend behind navbar)
-          /// 
+          ///
           Positioned.fill(
             child: IndexedStack(
               index: _currentIndex,