Update app bar button spacing

lib/components/widgets/slivers/harpy_sliver_app_bar.dart

@@ -144,14 +144,22 @@ class _SliverHeaderDelegate extends SliverPersistentHeaderDelegate {
  child: Padding(
  padding: EdgeInsetsDirectional.only(top: topPadding),
  child: NavigationToolbar(
- leading: _leading(context, leading: leading),
+ leading: _leading(
+ context,
+ leading: leading,
+ paddingValue: paddingValue,
+ ),
  middle: title != null
  ? DefaultTextStyle(
  style: titleStyle,
  child: fittedTitle ? FittedBox(child: title) : title!,
  )
  : null,
- trailing: _trailing(context, actions: actions),
+ trailing: _trailing(
+ context,
+ actions: actions,
+ paddingValue: paddingValue,
+ ),
  middleSpacing: paddingValue / 2,
  ),
  ),
@@ -163,6 +171,7 @@ class _SliverHeaderDelegate extends SliverPersistentHeaderDelegate {
 Widget? _leading(
  BuildContext context, {
  required Widget? leading,
+ required double paddingValue,
 }) {
  final theme = Theme.of(context);
  final route = ModalRoute.of(context);
@@ -188,13 +197,18 @@ Widget? _leading(
  );
  }
 
- if (child != null) return child;
- return null;
+ if (child == null) return null;
+
+ return Padding(
+ padding: EdgeInsetsDirectional.only(start: paddingValue),
+ child: child,
+ );
 }
 
 Widget? _trailing(
  BuildContext context, {
  required List<Widget>? actions,
+ required double paddingValue,
 }) {
  final theme = Theme.of(context);
 
@@ -213,6 +227,10 @@ Widget? _trailing(
  );
  }
 
- if (child != null) return child;
- return null;
+ if (child == null) return null;
+
+ return Padding(
+ padding: EdgeInsetsDirectional.only(end: paddingValue),
+ child: child,
+ );
 }