fix：对比原型增加功能交互

lib/data/repositories/user_state_repository.dart

@@ -0,0 +1,80 @@
+import '../state/app_interaction_state.dart';
+
+abstract class UserStateRepository {
+  Future<bool> isLoggedIn();
+  Future<void> login(LoginMethod method);
+  Future<void> logout();
+
+  Future<Set<String>> getFavorites();
+  Future<void> toggleFavorite(String reportId);
+
+  Future<Set<String>> getSavedListens();
+  Future<void> toggleSavedListen(String reportId);
+
+  Future<List<String>> getHistory();
+  Future<void> addHistory(String reportId);
+
+  Future<Map<String, double>> getAudioProgress();
+  Future<void> saveAudioProgress(String audioId, double seconds);
+}
+
+class MemoryUserStateRepository implements UserStateRepository {
+  bool _loggedIn = false;
+  final Set<String> _favorites = {};
+  final Set<String> _savedListens = {};
+  final List<String> _history = [];
+  final Map<String, double> _audioProgress = {};
+
+  @override
+  Future<bool> isLoggedIn() async => _loggedIn;
+
+  @override
+  Future<void> login(LoginMethod method) async {
+    _loggedIn = true;
+  }
+
+  @override
+  Future<void> logout() async {
+    _loggedIn = false;
+  }
+
+  @override
+  Future<Set<String>> getFavorites() async => {..._favorites};
+
+  @override
+  Future<void> toggleFavorite(String reportId) async {
+    if (!_favorites.add(reportId)) {
+      _favorites.remove(reportId);
+    }
+  }
+
+  @override
+  Future<Set<String>> getSavedListens() async => {..._savedListens};
+
+  @override
+  Future<void> toggleSavedListen(String reportId) async {
+    if (!_savedListens.add(reportId)) {
+      _savedListens.remove(reportId);
+    }
+  }
+
+  @override
+  Future<List<String>> getHistory() async => [..._history];
+
+  @override
+  Future<void> addHistory(String reportId) async {
+    _history.remove(reportId);
+    _history.insert(0, reportId);
+    if (_history.length > 40) {
+      _history.removeRange(40, _history.length);
+    }
+  }
+
+  @override
+  Future<Map<String, double>> getAudioProgress() async => {..._audioProgress};
+
+  @override
+  Future<void> saveAudioProgress(String audioId, double seconds) async {
+    _audioProgress[audioId] = seconds < 0 ? 0 : seconds;
+  }
+}