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lib/page/plan/detail/widgets/scroll_box.dart

@@ -0,0 +1,23 @@
+import 'package:flutter/material.dart';
+
+class ScrollBox extends StatelessWidget {
+  final Widget child;
+
+  const ScrollBox({super.key, required this.child});
+
+  @override
+  Widget build(BuildContext context) {
+    return ScrollbarTheme(
+      data: ScrollbarThemeData(
+        thumbColor: WidgetStateProperty.all(Theme.of(context).colorScheme.surfaceContainerHigh),
+        thickness: WidgetStateProperty.all(3),
+        crossAxisMargin: 3,
+        mainAxisMargin: 2,
+        radius: const Radius.circular(5),
+      ),
+      child: Scrollbar(
+        child: child,
+      ),
+    );
+  }
+}