Implement Riverpod AsyncValue UI for catalog/orders/pricing/reports screens

[Faifor]

Motivation

• Replace placeholder screens that only showed Text('... screen') with real UI that reads state from Riverpod providers and behaves like production features.
• Provide consistent handling for AsyncValue states (loading/error/data) to match existing controllers and test patterns.
• Add simple user actions (reload/pull-to-refresh/retry) so screens can trigger controller.load() during manual use and automated tests.
• Make widget keys and UX deterministic for existing integration and widget tests that rely on specific finders.

Description

• Converted CatalogScreen, OrdersScreen, PricingScreen, and ReportsScreen to ConsumerWidget and imported core/di/providers.dart and flutter_riverpod to read their respective *StateProviders and controllers.
• Implemented state.when(...) rendering for each screen to show a CircularProgressIndicator for loading (*_loading), an error message plus retry button (*_error, *_retry) for errors, and a RefreshIndicator + ListView of cards for data (*_refresh, *_list, *_item_*).
• Added an AppBar reload button in each screen that calls controller.load() via ref.read(...notifier).load(), and added consistent widget keys (*_reload, *_list, *_loading, *_error, etc.) for automation.
• Updated test/integration/auth_flow_integration_test.dart to wrap the router in a ProviderScope and override ordersStateProvider with a test controller so navigation assertions are deterministic, and added test/widget/async_feature_screens_test.dart to verify basic loading/error/data/reload behaviors for the modified screens.

Testing

• Ran repository checks (git diff --check) which returned no issues for the modified files and staged changes were prepared for commit.
• Attempted to run dart format but the dart binary is not available in the current environment, so formatting and Dart-based test runs were not executed here.
• Attempted to query flutter and to capture a Playwright screenshot of a running app, but flutter is not available and there is no running web server, so UI/runtime validation could not be performed in this environment.
• New widget and integration tests were added (see test/widget/async_feature_screens_test.dart and updated test/integration/auth_flow_integration_test.dart), but they were not executed due to the missing Flutter/Dart tooling in this environment.

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[chatgpt-codex-connector]

Make refresh list always scrollable

RefreshIndicator only fires when its child can overscroll, but this ListView.builder keeps default physics; when the catalog has no items (or too few items to exceed viewport height), users cannot trigger pull-to-refresh at all. Since the screen advertises pull-to-refresh behavior, add always-scrollable physics (and mirror the same fix in the parallel orders/pricing/reports screens) so refresh works for short/empty datasets.

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