fix：参考金值，研听，研值工程通用通用工程公共能力，重点对比网络请求、登录认证、状态管理、本地存储、WebView、推送、版本更新、一键登录、主题/UI 等模块，确定后续统一整改方案

lib/features/assets/application/asset_portfolio_controller.dart

@@ -1,16 +1,29 @@
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 
 import '../../../common/domain/metal_type.dart';
+import '../../auth/application/auth_controller.dart';
+import '../../auth/data/auth_models.dart';
 import '../../market/data/mock_market_repository.dart';
 import '../data/asset_models.dart';
 import '../data/mock_asset_repository.dart';
 
 final assetPortfolioControllerProvider =
     StateNotifierProvider<AssetPortfolioController, PortfolioSummary>((ref) {
-      final holdings = ref.watch(mockAssetRepositoryProvider).loadHoldings();
+      final repository = ref.watch(mockAssetRepositoryProvider);
+      final authState = ref.watch(authProvider).valueOrNull;
+      final accountScope = switch (authState) {
+        LoggedInAuthState(:final user) => MockAssetRepository.accountScope(
+          userId: user.id,
+          phone: user.phone,
+        ),
+        _ => MockAssetRepository.guestAccountScope,
+      };
+      final holdings = repository.loadHoldings(accountScope);
       final market = ref.watch(mockMarketRepositoryProvider);
       return AssetPortfolioController(
         holdings: holdings,
+        repository: repository,
+        accountScope: accountScope,
         spotPriceFor: (metal) => market.quoteFor(metal).spotPrice,
         changeFor: (metal) => market.quoteFor(metal).changeAmount,
       );
@@ -19,10 +32,14 @@ final assetPortfolioControllerProvider =
 class AssetPortfolioController extends StateNotifier<PortfolioSummary> {
   AssetPortfolioController({
     required List<GoldAssetHolding> holdings,
+    required MockAssetRepository repository,
+    required String accountScope,
     required double Function(MetalType metal) spotPriceFor,
     required double Function(MetalType metal) changeFor,
     this.recycleDiscount = 0.97,
   }) : _holdings = holdings,
+       _repository = repository,
+       _accountScope = accountScope,
        _spotPriceFor = spotPriceFor,
        _changeFor = changeFor,
        super(
@@ -35,12 +52,25 @@ class AssetPortfolioController extends StateNotifier<PortfolioSummary> {
        );
 
   final List<GoldAssetHolding> _holdings;
+  final MockAssetRepository _repository;
+  final String _accountScope;
   final double Function(MetalType metal) _spotPriceFor;
   final double Function(MetalType metal) _changeFor;
   final double recycleDiscount;
 
-  void addHolding(GoldAssetHolding holding) {
+  Future<void> addHolding(GoldAssetHolding holding) async {
     _holdings.add(holding);
+    await _repository.saveHoldings(_accountScope, _holdings);
+    state = _buildSummary(
+      holdings: _holdings,
+      spotPriceFor: _spotPriceFor,
+      changeFor: _changeFor,
+      recycleDiscount: recycleDiscount,
+    );
+  }
+
+  void clearHoldings() {
+    _holdings.clear();
     state = _buildSummary(
       holdings: _holdings,
       spotPriceFor: _spotPriceFor,