feat: login view

lib/application/component/button/button_back.dart

@@ -1,17 +1,22 @@
+import 'package:cims_apps/application/theme/color_palette.dart';
 import 'package:cims_apps/core/utils/size_config.dart';
 import 'package:flutter/material.dart';
 
 class ButtonBack extends StatelessWidget {
-  const ButtonBack({super.key});
+  final EdgeInsets? margin;
+  const ButtonBack({super.key, this.margin});
 
   @override
   Widget build(BuildContext context) {
-    return SizedBox(
+    return Container(
+      margin: margin ?? EdgeInsets.all(0),
       width: SizeConfig.width * 0.1,
       child: IconButton(
           style: IconButton.styleFrom(
               backgroundColor: Colors.white,
-              shape: const CircleBorder()
+              shape: const CircleBorder(
+                side: BorderSide(color: ColorPalette.slate200)
+              )
           ),
           onPressed: () {
             Navigator.pop(context);