marktvogt.de/app/lib/shared/widgets/app_scaffold.dart

import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';

class AppScaffold extends StatelessWidget {
  final Widget child;

  const AppScaffold({super.key, required this.child});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(
          'Marktvogt',
          style: Theme.of(context).appBarTheme.titleTextStyle,
        ),
      ),
      body: child,
      bottomNavigationBar: _BottomNav(),
    );
  }
}

class _BottomNav extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final location = GoRouterState.of(context).uri.toString();
    final currentIndex = location.startsWith('/profil') ? 1 : 0;

    return BottomNavigationBar(
      currentIndex: currentIndex,
      onTap: (index) {
        switch (index) {
          case 0:
            context.go('/');
          case 1:
            context.go('/profil');
        }
      },
      items: const [
        BottomNavigationBarItem(
          icon: Icon(Icons.search),
          label: 'Suche',
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.person),
          label: 'Profil',
        ),
      ],
    );
  }
}