initial

lib/features/common/custom_app_bar.dart

@@ -0,0 +1,24 @@
+import 'package:flutter/material.dart';
+
+abstract class RootScaffold {
+  static final stateKey = GlobalKey<ScaffoldState>();
+}
+
+class NestedTabAppBar extends SliverAppBar {
+  NestedTabAppBar({
+    super.key,
+    super.title,
+    super.actions,
+    super.pinned = true,
+    super.forceElevated,
+    super.bottom,
+  }) : super(
+          leading: RootScaffold.stateKey.currentState?.hasDrawer ?? false
+              ? DrawerButton(
+                  onPressed: () {
+                    RootScaffold.stateKey.currentState?.openDrawer();
+                  },
+                )
+              : null,
+        );
+}