fix

lib/shared/widgets/app_bottom_nav_shell.dart

@@ -0,0 +1,81 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+/// Shell widget that provides bottom navigation for the app
+class AppBottomNavShell extends StatelessWidget {
+  const AppBottomNavShell({
+    super.key,
+    required this.child,
+  });
+
+  final Widget child;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: child,
+      bottomNavigationBar: _AppBottomNavigationBar(),
+    );
+  }
+}
+
+class _AppBottomNavigationBar extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    final location = GoRouterState.of(context).matchedLocation;
+
+    // Determine current index based on location
+    int currentIndex = 0;
+    if (location == '/') {
+      currentIndex = 0;
+    } else if (location.startsWith('/products')) {
+      currentIndex = 1;
+    } else if (location.startsWith('/categories')) {
+      currentIndex = 2;
+    } else if (location.startsWith('/settings')) {
+      currentIndex = 3;
+    }
+
+    return NavigationBar(
+      selectedIndex: currentIndex,
+      onDestinationSelected: (index) {
+        switch (index) {
+          case 0:
+            context.go('/');
+            break;
+          case 1:
+            context.go('/products');
+            break;
+          case 2:
+            context.go('/categories');
+            break;
+          case 3:
+            context.go('/settings');
+            break;
+        }
+      },
+      destinations: const [
+        NavigationDestination(
+          icon: Icon(Icons.point_of_sale_outlined),
+          selectedIcon: Icon(Icons.point_of_sale),
+          label: 'Home',
+        ),
+        NavigationDestination(
+          icon: Icon(Icons.inventory_2_outlined),
+          selectedIcon: Icon(Icons.inventory_2),
+          label: 'Products',
+        ),
+        NavigationDestination(
+          icon: Icon(Icons.category_outlined),
+          selectedIcon: Icon(Icons.category),
+          label: 'Categories',
+        ),
+        NavigationDestination(
+          icon: Icon(Icons.settings_outlined),
+          selectedIcon: Icon(Icons.settings),
+          label: 'Settings',
+        ),
+      ],
+    );
+  }
+}