Orders Routes

Two GoRoutes inside the ShellRoute: /orders → OrdersScreen, /orders/:orderId → OrderDetailScreen. Both are role-aware at render time, not at routing time — the auth guard only checks isLoggedIn.

1. Home grid tile 'Panier' / 'Orders' navigates to /orders.
2. OrderCard taps push /orders/:orderId with the path param.
3. Detail screen reads pathParameters['orderId'] and feeds orderDetailProvider.

• Deep-linking from a notification (FCM 'new order') jumps directly to /orders/:orderId — make sure orderDetailProvider can recover from a cold-start cache miss.
• No nested ShellRoute — the bottom nav stays visible on detail.

• lib/src/core/routing/app_router.dart:613 // /orders
• lib/src/core/routing/app_router.dart:619 // /orders/:orderId

Receipt screen is pushed (not routed) from order detail — keep it out of the GoRouter table to avoid making it deep-linkable.