Initial Flutter scaffold: Riverpod + GoRouter + Dio

lib/app/app.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'router.dart';
+import '../config/theme.dart';
+
+class NetworkApp extends ConsumerWidget {
+  const NetworkApp({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final router = ref.watch(routerProvider);
+    
+    return MaterialApp.router(
+      title: 'Network App',
+      theme: AppTheme.light,
+      darkTheme: AppTheme.dark,
+      themeMode: ThemeMode.system,
+      routerConfig: router,
+      debugShowCheckedModeBanner: false,
+    );
+  }
+}

lib/app/router.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:go_router/go_router.dart';
+
+import '../features/auth/presentation/login_screen.dart';
+import '../features/auth/presentation/register_screen.dart';
+import '../features/clients/presentation/clients_screen.dart';
+import '../features/clients/presentation/client_detail_screen.dart';
+import '../features/clients/presentation/client_form_screen.dart';
+import '../features/emails/presentation/emails_screen.dart';
+import '../features/emails/presentation/email_compose_screen.dart';
+import '../features/events/presentation/events_screen.dart';
+import '../shared/providers/auth_provider.dart';
+
+final routerProvider = Provider<GoRouter>((ref) {
+  final authState = ref.watch(authStateProvider);
+  
+  return GoRouter(
+    initialLocation: '/',
+    redirect: (context, state) {
+      final isLoggedIn = authState.valueOrNull?.isAuthenticated ?? false;
+      final isAuthRoute = state.matchedLocation == '/login' || 
+                          state.matchedLocation == '/register';
+      
+      if (!isLoggedIn && !isAuthRoute) {
+        return '/login';
+      }
+      
+      if (isLoggedIn && isAuthRoute) {
+        return '/';
+      }
+      
+      return null;
+    },
+    routes: [
+      // Auth routes
+      GoRoute(
+        path: '/login',
+        builder: (context, state) => const LoginScreen(),
+      ),
+      GoRoute(
+        path: '/register',
+        builder: (context, state) => const RegisterScreen(),
+      ),
+      
+      // Main app routes
+      ShellRoute(
+        builder: (context, state, child) => MainShell(child: child),
+        routes: [
+          GoRoute(
+            path: '/',
+            builder: (context, state) => const ClientsScreen(),
+          ),
+          GoRoute(
+            path: '/clients/new',
+            builder: (context, state) => const ClientFormScreen(),
+          ),
+          GoRoute(
+            path: '/clients/:id',
+            builder: (context, state) => ClientDetailScreen(
+              clientId: state.pathParameters['id']!,
+            ),
+          ),
+          GoRoute(
+            path: '/clients/:id/edit',
+            builder: (context, state) => ClientFormScreen(
+              clientId: state.pathParameters['id'],
+            ),
+          ),
+          GoRoute(
+            path: '/emails',
+            builder: (context, state) => const EmailsScreen(),
+          ),
+          GoRoute(
+            path: '/emails/compose',
+            builder: (context, state) => EmailComposeScreen(
+              clientId: state.uri.queryParameters['clientId'],
+            ),
+          ),
+          GoRoute(
+            path: '/events',
+            builder: (context, state) => const EventsScreen(),
+          ),
+        ],
+      ),
+    ],
+  );
+});
+
+class MainShell extends StatelessWidget {
+  final Widget child;
+  
+  const MainShell({super.key, required this.child});
+  
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: child,
+      bottomNavigationBar: NavigationBar(
+        selectedIndex: _getSelectedIndex(context),
+        onDestinationSelected: (index) => _onDestinationSelected(context, index),
+        destinations: const [
+          NavigationDestination(
+            icon: Icon(Icons.people_outline),
+            selectedIcon: Icon(Icons.people),
+            label: 'Clients',
+          ),
+          NavigationDestination(
+            icon: Icon(Icons.email_outline),
+            selectedIcon: Icon(Icons.email),
+            label: 'Emails',
+          ),
+          NavigationDestination(
+            icon: Icon(Icons.event_outline),
+            selectedIcon: Icon(Icons.event),
+            label: 'Events',
+          ),
+        ],
+      ),
+    );
+  }
+  
+  int _getSelectedIndex(BuildContext context) {
+    final location = GoRouterState.of(context).matchedLocation;
+    if (location.startsWith('/emails')) return 1;
+    if (location.startsWith('/events')) return 2;
+    return 0;
+  }
+  
+  void _onDestinationSelected(BuildContext context, int index) {
+    switch (index) {
+      case 0:
+        context.go('/');
+        break;
+      case 1:
+        context.go('/emails');
+        break;
+      case 2:
+        context.go('/events');
+        break;
+    }
+  }
+}