fix：升级 Flutter 3.44.9级相关插件

lib/features/assets/application/asset_portfolio_controller.dart

@@ -1,4 +1,4 @@
-import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:hooks_riverpod/legacy.dart';
 
 import '../../../common/domain/metal_type.dart';
 import '../../auth/application/auth_controller.dart';
@@ -10,7 +10,7 @@ import '../data/mock_asset_repository.dart';
 final assetPortfolioControllerProvider =
     StateNotifierProvider<AssetPortfolioController, PortfolioSummary>((ref) {
       final repository = ref.watch(mockAssetRepositoryProvider);
-      final authState = ref.watch(authProvider).valueOrNull;
+      final authState = ref.watch(authProvider).value;
       final accountScope = switch (authState) {
         LoggedInAuthState(:final user) => MockAssetRepository.accountScope(
           userId: user.id,