Frontend first draft

frontend/pweb/lib/widgets/appbar/notifications.dart

@@ -0,0 +1,13 @@
+import 'package:flutter/material.dart';
+
+class NotificationsButton extends StatelessWidget {
+  const NotificationsButton({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return IconButton(
+      icon: Icon(Icons.notifications),
+      onPressed: null,
+    );
+  }
+}