updated back button visibility

luckychit/lib/interfaces/manager/group_details_page.dart

@@ -74,13 +74,22 @@ class _GroupDetailsPageState extends State<GroupDetailsPage> with SingleTickerPr
     return Scaffold(
       backgroundColor: Colors.grey.shade50,
       appBar: AppBar(
+        leading: IconButton(
+          icon: Icon(Icons.arrow_back, color: Colors.grey.shade800, size: 24.w),
+          onPressed: () => Navigator.pop(context),
+          tooltip: 'Back',
+        ),
         title: Text(
           widget.group.name,
-          style: TextStyle(fontSize: 20.sp, fontWeight: FontWeight.w600),
+          style: TextStyle(
+            fontSize: 20.sp,
+            fontWeight: FontWeight.w600,
+            color: Colors.grey.shade900,
+          ),
           overflow: TextOverflow.ellipsis,
         ),
         backgroundColor: Colors.white,
-        foregroundColor: Colors.black87,
+        iconTheme: IconThemeData(color: Colors.grey.shade800),
         elevation: 0,
         actions: [
           if (widget.group.isForming)

luckychit/lib/interfaces/member/member_group_details_page.dart

@@ -59,6 +59,11 @@ class _MemberGroupDetailsPageState extends State<MemberGroupDetailsPage>
     return Scaffold(
       backgroundColor: Colors.grey.shade50,
       appBar: AppBar(
+        leading: IconButton(
+          icon: const Icon(Icons.arrow_back),
+          onPressed: () => Navigator.pop(context),
+          tooltip: 'Back',
+        ),
         title: Text(
           widget.group.name,
           style: TextStyle(fontSize: 20.sp, fontWeight: FontWeight.w600),