🐛 Bug fixes

lib/shells/system_shell.dart

@@ -0,0 +1,29 @@
+import 'package:flutter/material.dart';
+import 'package:rhythm_box/platform.dart';
+
+class SystemShell extends StatelessWidget {
+  final Widget child;
+
+  const SystemShell({super.key, required this.child});
+
+  @override
+  Widget build(BuildContext context) {
+    if (PlatformInfo.isMacOS) {
+      return Column(
+        children: [
+          Container(
+            height: 28,
+            color: Theme.of(context).colorScheme.surface,
+          ),
+          const Divider(
+            thickness: 0.3,
+            height: 0.3,
+          ),
+          Expanded(child: child),
+        ],
+      );
+    }
+
+    return child;
+  }
+}