feat(flutter): 接入分类记录收藏与下载授权

lib/core/data/models/content_category.dart

@@ -0,0 +1,17 @@
+// Author: fruit.com.cn
+
+/// 服务端内容分类。id 按契约保持字符串，避免雪花 ID 精度丢失。
+class ContentCategory {
+  const ContentCategory({required this.id, required this.name});
+
+  final String id;
+  final String name;
+
+  /// 解析 `GET /app/categories` 的单项。
+  factory ContentCategory.fromJson(Map<String, dynamic> json) {
+    return ContentCategory(
+      id: (json['id'] ?? '').toString(),
+      name: json['name'] as String? ?? '',
+    );
+  }
+}

lib/core/data/models/download_license.dart

@@ -0,0 +1,67 @@
+// Author: fruit.com.cn
+
+import 'json_numbers.dart';
+
+/// 下载授权与任务进度合并视图，对应 `GET /app/downloads` 的列表项。
+class DownloadLicense {
+  const DownloadLicense({
+    required this.licenseId,
+    required this.dramaId,
+    required this.dramaTitle,
+    required this.episodeId,
+    required this.episodeNo,
+    required this.deviceId,
+    required this.quality,
+    required this.playUrl,
+    required this.licenseKey,
+    required this.status,
+    required this.grantedAt,
+    required this.expireAt,
+    required this.taskStatus,
+    required this.progressPercent,
+    required this.downloadedBytes,
+    required this.totalBytes,
+    required this.errorMsg,
+  });
+
+  final String licenseId;
+  final String dramaId;
+  final String dramaTitle;
+  final String episodeId;
+  final int episodeNo;
+  final String deviceId;
+  final String quality;
+  final String playUrl;
+  final String licenseKey;
+  final String status;
+  final DateTime? grantedAt;
+  final DateTime? expireAt;
+  final String taskStatus;
+  final int progressPercent;
+  final int downloadedBytes;
+  final int totalBytes;
+  final String errorMsg;
+
+  /// 解析授权响应；所有 ID 与 Long 字段兼容字符串下发。
+  factory DownloadLicense.fromJson(Map<String, dynamic> json) {
+    return DownloadLicense(
+      licenseId: (json['licenseId'] ?? '').toString(),
+      dramaId: (json['dramaId'] ?? '').toString(),
+      dramaTitle: json['dramaTitle'] as String? ?? '',
+      episodeId: (json['episodeId'] ?? '').toString(),
+      episodeNo: jsonToInt(json['episodeNo']),
+      deviceId: json['deviceId'] as String? ?? '',
+      quality: json['quality'] as String? ?? '',
+      playUrl: json['playUrl'] as String? ?? '',
+      licenseKey: json['licenseKey'] as String? ?? '',
+      status: json['status'] as String? ?? '',
+      grantedAt: DateTime.tryParse(json['grantedAt'] as String? ?? ''),
+      expireAt: DateTime.tryParse(json['expireAt'] as String? ?? ''),
+      taskStatus: json['taskStatus'] as String? ?? '',
+      progressPercent: jsonToInt(json['progressPercent']),
+      downloadedBytes: jsonToInt(json['downloadedBytes']),
+      totalBytes: jsonToInt(json['totalBytes']),
+      errorMsg: json['errorMsg'] as String? ?? '',
+    );
+  }
+}

lib/core/data/models/download_policy.dart

@@ -0,0 +1,54 @@
+// Author: fruit.com.cn
+
+import 'json_numbers.dart';
+
+/// 下载策略与当前设备配额，对应 `GET /app/downloads/policy`。
+class DownloadPolicy {
+  const DownloadPolicy({
+    required this.maxPerDevice,
+    required this.licenseDays,
+    required this.wifiOnly,
+    required this.maxQuality,
+    required this.maxStorageBytes,
+    required this.used,
+    required this.remaining,
+    required this.expirePolicyText,
+  });
+
+  final int maxPerDevice;
+  final int licenseDays;
+  final bool wifiOnly;
+  final String maxQuality;
+  final int maxStorageBytes;
+  final int used;
+  final int remaining;
+  final String expirePolicyText;
+
+  /// 设置更新期间用于本地乐观展示。
+  DownloadPolicy copyWith({bool? wifiOnly, String? maxQuality}) {
+    return DownloadPolicy(
+      maxPerDevice: maxPerDevice,
+      licenseDays: licenseDays,
+      wifiOnly: wifiOnly ?? this.wifiOnly,
+      maxQuality: maxQuality ?? this.maxQuality,
+      maxStorageBytes: maxStorageBytes,
+      used: used,
+      remaining: remaining,
+      expirePolicyText: expirePolicyText,
+    );
+  }
+
+  /// 解析策略响应；Long 字段兼容字符串。
+  factory DownloadPolicy.fromJson(Map<String, dynamic> json) {
+    return DownloadPolicy(
+      maxPerDevice: jsonToInt(json['maxPerDevice']),
+      licenseDays: jsonToInt(json['licenseDays']),
+      wifiOnly: json['wifiOnly'] == true,
+      maxQuality: json['maxQuality'] as String? ?? '',
+      maxStorageBytes: jsonToInt(json['maxStorageBytes']),
+      used: jsonToInt(json['used']),
+      remaining: jsonToInt(json['remaining']),
+      expirePolicyText: json['expirePolicyText'] as String? ?? '',
+    );
+  }
+}

lib/core/data/models/watch_progress.dart

@@ -14,6 +14,7 @@ class WatchProgress {
     required this.duration,
     this.finished = false,
     this.playCount = 0,
+    this.updatedAt,
   });
 
   final String dramaId;
@@ -22,6 +23,7 @@ class WatchProgress {
   final Duration duration;
   final bool finished;
   final int playCount;
+  final DateTime? updatedAt;
 
   bool get hasPosition => position > Duration.zero;
 
@@ -39,6 +41,7 @@ class WatchProgress {
       duration: Duration(milliseconds: jsonToInt(json['durationMs'])),
       finished: json['finished'] == true,
       playCount: jsonToInt(json['playCount']),
+      updatedAt: DateTime.tryParse(json['updatedAt'] as String? ?? ''),
     );
   }
 
@@ -49,6 +52,7 @@ class WatchProgress {
     'durationMs': duration.inMilliseconds,
     'finished': finished,
     'playCount': playCount,
+    if (updatedAt != null) 'updatedAt': updatedAt!.toIso8601String(),
   };
 }
 

lib/core/data/models/watch_record.dart

@@ -0,0 +1,44 @@
+// Author: fruit.com.cn
+
+import 'drama.dart';
+import 'watch_progress.dart';
+
+/// 观看记录页的一条数据：进度记录与按 dramaId 补取的详情卡片。
+class WatchRecord {
+  const WatchRecord({
+    required this.progress,
+    this.drama,
+    this.detailLoading = true,
+    this.detailFailed = false,
+  });
+
+  final WatchProgress progress;
+  final Drama? drama;
+  final bool detailLoading;
+  final bool detailFailed;
+
+  String get dramaId => progress.dramaId;
+
+  /// 详情中按 episodeId 定位集号；缺失时返回 0。
+  int get episodeNumber {
+    final episodes = drama?.episodes ?? const <Episode>[];
+    for (var index = 0; index < episodes.length; index++) {
+      if (episodes[index].id == progress.episodeId) return index + 1;
+    }
+    return 0;
+  }
+
+  /// 生成卡片加载中、成功或失败后的新状态。
+  WatchRecord copyWith({
+    Drama? drama,
+    bool? detailLoading,
+    bool? detailFailed,
+  }) {
+    return WatchRecord(
+      progress: progress,
+      drama: drama ?? this.drama,
+      detailLoading: detailLoading ?? this.detailLoading,
+      detailFailed: detailFailed ?? this.detailFailed,
+    );
+  }
+}

lib/core/data/remote/api_client.dart

@@ -79,6 +79,21 @@ class ApiClient {
     );
   }
 
+  Future<Object?> put(
+    String path, {
+    Object? body,
+    Map<String, String>? query,
+    bool skipAuthRetry = false,
+  }) {
+    return _request(
+      'PUT',
+      path,
+      body: body,
+      query: query,
+      skipAuthRetry: skipAuthRetry,
+    );
+  }
+
   Future<Object?> delete(
     String path, {
     Object? body,

lib/core/data/remote/category_api.dart

@@ -0,0 +1,21 @@
+// Author: fruit.com.cn
+
+import '../models/content_category.dart';
+import 'api_client.dart';
+
+/// 内容分类接口，对应契约 `GET /app/categories`。
+class CategoryApi {
+  const CategoryApi(this._client);
+
+  final ApiClient _client;
+
+  /// 拉取已启用分类，id 全程按字符串解析。
+  Future<List<ContentCategory>> list() async {
+    final data = await _client.get('/app/categories');
+    if (data is! List) return const [];
+    return [
+      for (final item in data)
+        if (item is Map<String, dynamic>) ContentCategory.fromJson(item),
+    ];
+  }
+}

lib/core/data/remote/download_api.dart

@@ -0,0 +1,101 @@
+// Author: fruit.com.cn
+
+import '../models/download_license.dart';
+import '../models/download_policy.dart';
+import 'api_client.dart';
+
+/// 离线下载授权接口，对应契约 §1.6 的全部 8 个接口。
+///
+/// 设备号由 [ApiClient] 统一通过 `X-Device-Id` 发送，本类不另造设备参数。
+class DownloadApi {
+  const DownloadApi(this._client);
+
+  final ApiClient _client;
+
+  /// 拉取配额和偏好策略。
+  Future<DownloadPolicy> policy() async {
+    return DownloadPolicy.fromJson(
+      _asMap(await _client.get('/app/downloads/policy')),
+    );
+  }
+
+  /// 更新仅 Wi-Fi 与最高清晰度偏好。
+  Future<void> updateSettings({bool? wifiOnly, String? maxQuality}) async {
+    await _client.put(
+      '/app/downloads/settings',
+      body: {'wifiOnly': ?wifiOnly, 'maxQuality': ?maxQuality},
+    );
+  }
+
+  /// 申请下载授权；同集重复申请由服务端保证幂等。
+  Future<DownloadLicense> grant(String episodeId, {String? quality}) async {
+    return DownloadLicense.fromJson(
+      _asMap(
+        await _client.post(
+          '/app/downloads',
+          body: {'episodeId': episodeId, 'quality': ?quality},
+        ),
+      ),
+    );
+  }
+
+  /// 拉取当前设备的授权列表。
+  Future<List<DownloadLicense>> list() async {
+    final data = await _client.get('/app/downloads');
+    if (data is! List) return const [];
+    return [
+      for (final item in data)
+        if (item is Map<String, dynamic>) DownloadLicense.fromJson(item),
+    ];
+  }
+
+  /// 续传前刷新短时效下载地址。
+  Future<DownloadLicense> refreshUrl(String episodeId) async {
+    return DownloadLicense.fromJson(
+      _asMap(await _client.get('/app/downloads/$episodeId/url')),
+    );
+  }
+
+  /// 上报下载进度；本批只提供方法，不启动文件落盘。
+  Future<DownloadLicense> reportProgress(
+    String episodeId, {
+    String? deviceId,
+    String? status,
+    int? progressPercent,
+    int? downloadedBytes,
+    int? totalBytes,
+    String? errorMsg,
+  }) async {
+    return DownloadLicense.fromJson(
+      _asMap(
+        await _client.post(
+          '/app/downloads/$episodeId/progress',
+          body: {
+            'deviceId': ?deviceId,
+            'status': ?status,
+            'progressPercent': ?progressPercent,
+            'downloadedBytes': ?downloadedBytes,
+            'totalBytes': ?totalBytes,
+            'errorMsg': ?errorMsg,
+          },
+        ),
+      ),
+    );
+  }
+
+  /// 吊销单集授权。
+  Future<void> remove(String episodeId) async {
+    await _client.delete('/app/downloads/$episodeId');
+  }
+
+  /// 清空当前设备授权并返回清除条数。
+  Future<int> clear() async {
+    final data = await _client.delete('/app/downloads');
+    return data is int ? data : 0;
+  }
+
+  Map<String, dynamic> _asMap(Object? data) {
+    if (data is Map<String, dynamic>) return data;
+    throw const ApiException(-1, '');
+  }
+}

lib/core/data/remote/watch_api.dart

@@ -56,4 +56,9 @@ class WatchApi {
   Future<void> removeProgress(String dramaId) async {
     await _client.delete('/app/watch/progress/$dramaId');
   }
+
+  /// 清空当前账号的全部观看记录。
+  Future<void> clearProgress() async {
+    await _client.delete('/app/watch/progress');
+  }
 }

lib/core/data/repositories/category_repository.dart

@@ -0,0 +1,30 @@
+// Author: fruit.com.cn
+
+import '../models/content_category.dart';
+import '../models/home_feed.dart';
+import '../remote/category_api.dart';
+import 'catalog_repository.dart';
+
+/// 发现页分类数据来源：分类清单与发现 feed。
+abstract interface class CategoryRepository {
+  /// 拉取服务端分类。
+  Future<List<ContentCategory>> fetchCategories();
+
+  /// 拉取发现页分区；分类内容只从这里读取。
+  Future<HomeFeed> fetchDiscoverFeed();
+}
+
+/// HTTP 实现。发现 feed 复用既有目录仓库，不新增接口。
+class HttpCategoryRepository implements CategoryRepository {
+  const HttpCategoryRepository(this._categoryApi, this._catalogRepository);
+
+  final CategoryApi _categoryApi;
+  final CatalogRepository _catalogRepository;
+
+  @override
+  Future<List<ContentCategory>> fetchCategories() => _categoryApi.list();
+
+  @override
+  Future<HomeFeed> fetchDiscoverFeed() =>
+      _catalogRepository.fetchDiscoverFeed();
+}

lib/core/data/repositories/download_repository.dart

@@ -0,0 +1,82 @@
+// Author: fruit.com.cn
+
+import '../models/download_license.dart';
+import '../models/download_policy.dart';
+import '../remote/download_api.dart';
+
+/// 下载授权数据来源，页面只依赖该抽象。
+abstract interface class DownloadRepository {
+  Future<DownloadPolicy> fetchPolicy();
+
+  Future<List<DownloadLicense>> list();
+
+  Future<DownloadLicense> grant(String episodeId, {String? quality});
+
+  Future<void> updateSettings({bool? wifiOnly, String? maxQuality});
+
+  Future<DownloadLicense> refreshUrl(String episodeId);
+
+  Future<DownloadLicense> reportProgress(
+    String episodeId, {
+    String? deviceId,
+    String? status,
+    int? progressPercent,
+    int? downloadedBytes,
+    int? totalBytes,
+    String? errorMsg,
+  });
+
+  Future<void> remove(String episodeId);
+
+  Future<int> clear();
+}
+
+/// HTTP 下载授权仓库。
+class HttpDownloadRepository implements DownloadRepository {
+  const HttpDownloadRepository(this._api);
+
+  final DownloadApi _api;
+
+  @override
+  Future<DownloadPolicy> fetchPolicy() => _api.policy();
+
+  @override
+  Future<List<DownloadLicense>> list() => _api.list();
+
+  @override
+  Future<DownloadLicense> grant(String episodeId, {String? quality}) =>
+      _api.grant(episodeId, quality: quality);
+
+  @override
+  Future<void> updateSettings({bool? wifiOnly, String? maxQuality}) =>
+      _api.updateSettings(wifiOnly: wifiOnly, maxQuality: maxQuality);
+
+  @override
+  Future<DownloadLicense> refreshUrl(String episodeId) =>
+      _api.refreshUrl(episodeId);
+
+  @override
+  Future<DownloadLicense> reportProgress(
+    String episodeId, {
+    String? deviceId,
+    String? status,
+    int? progressPercent,
+    int? downloadedBytes,
+    int? totalBytes,
+    String? errorMsg,
+  }) => _api.reportProgress(
+    episodeId,
+    deviceId: deviceId,
+    status: status,
+    progressPercent: progressPercent,
+    downloadedBytes: downloadedBytes,
+    totalBytes: totalBytes,
+    errorMsg: errorMsg,
+  );
+
+  @override
+  Future<void> remove(String episodeId) => _api.remove(episodeId);
+
+  @override
+  Future<int> clear() => _api.clear();
+}

lib/core/data/repositories/favorite_repository.dart

@@ -47,7 +47,9 @@ class InMemoryFavoriteRepository implements FavoriteRepository {
   final List<Drama> _cards;
   bool failToggle = false;
   bool failList = false;
+  bool failRemove = false;
   int toggleCalls = 0;
+  int listCalls = 0;
 
   @override
   Future<bool> toggle(String dramaId) async {
@@ -59,10 +61,14 @@ class InMemoryFavoriteRepository implements FavoriteRepository {
 
   @override
   Future<List<Drama>> list() async {
+    listCalls++;
     if (failList) throw StateError('favorite unavailable');
     return _cards.where((card) => _saved.contains(card.id)).toList();
   }
 
   @override
-  Future<void> remove(String dramaId) async => _saved.remove(dramaId);
+  Future<void> remove(String dramaId) async {
+    if (failRemove) throw StateError('favorite unavailable');
+    _saved.remove(dramaId);
+  }
 }

lib/core/data/repositories/watch_history_repository.dart

@@ -25,6 +25,9 @@ abstract interface class WatchHistoryRepository {
 
   /// 清理某部剧的记录（K2 的记录页会用，这里先备好）。
   Future<void> remove(String dramaId);
+
+  /// 清空当前账号的全部观看记录。
+  Future<void> clear();
 }
 
 class HttpWatchHistoryRepository implements WatchHistoryRepository {
@@ -70,12 +73,20 @@ class HttpWatchHistoryRepository implements WatchHistoryRepository {
     if (!_signedIn) return;
     await _api.removeProgress(dramaId);
   }
+
+  @override
+  Future<void> clear() async {
+    if (!_signedIn) return;
+    await _api.clearProgress();
+  }
 }
 
 /// 内存实现：单测与 widget 测试注入用（不依赖网络与偏好存储）。
 class InMemoryWatchHistoryRepository implements WatchHistoryRepository {
   InMemoryWatchHistoryRepository({List<WatchProgress>? seed})
-    : _records = {for (final item in seed ?? const <WatchProgress>[]) item.dramaId: item};
+    : _records = {
+        for (final item in seed ?? const <WatchProgress>[]) item.dramaId: item,
+      };
 
   final Map<String, WatchProgress> _records;
   int failReads = 0;
@@ -122,6 +133,9 @@ class InMemoryWatchHistoryRepository implements WatchHistoryRepository {
 
   @override
   Future<void> remove(String dramaId) async => _records.remove(dramaId);
+
+  @override
+  Future<void> clear() async => _records.clear();
 }
 
 /// 续看点辅助：把服务端记录换算成"第几集 + 从哪一秒开始"。

lib/core/data/services/category_controller.dart

@@ -0,0 +1,82 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/foundation.dart';
+
+import '../models/content_category.dart';
+import '../models/drama.dart';
+import '../models/home_feed.dart';
+import '../repositories/category_repository.dart';
+
+/// 发现页分类状态：服务端分类清单、发现 feed 与当前筛选。
+class CategoryController extends ChangeNotifier {
+  CategoryController(this._repository);
+
+  static const String allCode = 'all';
+  static const String hotCode = 'hot';
+  static const String newCode = 'new';
+
+  final CategoryRepository _repository;
+
+  List<ContentCategory> categories = const [];
+  HomeFeed feed = const HomeFeed();
+  String selectedCode = allCode;
+  bool loading = false;
+  String? error;
+  bool _disposed = false;
+
+  /// 当前筛选对应的分区 code；全部分类为空字符串语义。
+  bool get selectedSectionMissing =>
+      selectedCode != allCode && _selectedSection == null;
+
+  /// 当前筛选应展示的剧集；全部分类按 feed 顺序去重。
+  List<Drama> get visibleDramas {
+    if (selectedCode == allCode) return feed.dramas;
+    return _selectedSection?.dramas ?? const [];
+  }
+
+  FeedSection? get _selectedSection {
+    for (final section in feed.sections) {
+      if (section.code == selectedCode) return section;
+    }
+    return null;
+  }
+
+  /// 加载分类与发现 feed；失败保留可重试错误态。
+  Future<void> load() async {
+    loading = true;
+    error = null;
+    _notify();
+    try {
+      final results = await Future.wait<Object>([
+        _repository.fetchCategories(),
+        _repository.fetchDiscoverFeed(),
+      ]);
+      categories = results[0] as List<ContentCategory>;
+      feed = results[1] as HomeFeed;
+    } catch (_) {
+      error = 'categoriesError';
+    } finally {
+      loading = false;
+      _notify();
+    }
+  }
+
+  /// 选择服务端分类，内容只匹配 `category-{id}`。
+  void selectCategory(String id) => selectCode('category-$id');
+
+  /// 选择内置或分区 code。
+  void selectCode(String code) {
+    selectedCode = code;
+    _notify();
+  }
+
+  void _notify() {
+    if (!_disposed) notifyListeners();
+  }
+
+  @override
+  void dispose() {
+    _disposed = true;
+    super.dispose();
+  }
+}

lib/core/data/services/download_controller.dart

@@ -0,0 +1,168 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/foundation.dart';
+
+import '../models/download_license.dart';
+import '../models/download_policy.dart';
+import '../remote/api_exception.dart';
+import '../repositories/download_repository.dart';
+
+/// 一次下载授权申请的结果；后端业务拒绝时保留原始 message。
+class DownloadActionResult {
+  const DownloadActionResult({required this.ok, this.license, this.message});
+
+  final bool ok;
+  final DownloadLicense? license;
+  final String? message;
+}
+
+/// 下载授权与策略状态。
+class DownloadController extends ChangeNotifier {
+  DownloadController(this._repository);
+
+  final DownloadRepository _repository;
+
+  DownloadPolicy? policy;
+  List<DownloadLicense> licenses = const [];
+  bool loading = false;
+  bool clearing = false;
+  String? error;
+  String? actionError;
+  bool _disposed = false;
+
+  /// 同时拉取策略与当前设备授权列表。
+  Future<void> load() async {
+    loading = true;
+    error = null;
+    _notify();
+    try {
+      final results = await Future.wait<Object>([
+        _repository.fetchPolicy(),
+        _repository.list(),
+      ]);
+      policy = results[0] as DownloadPolicy;
+      licenses = results[1] as List<DownloadLicense>;
+    } catch (_) {
+      error = 'downloadsError';
+    } finally {
+      loading = false;
+      _notify();
+    }
+  }
+
+  /// 申请授权；付费、未解锁、配额满等判定完全以后端 message 为准。
+  Future<DownloadActionResult> grant(
+    String episodeId, {
+    String? quality,
+  }) async {
+    try {
+      final license = await _repository.grant(episodeId, quality: quality);
+      licenses = [
+        license,
+        for (final item in licenses)
+          if (item.episodeId != license.episodeId) item,
+      ];
+      actionError = null;
+      _notify();
+      return DownloadActionResult(ok: true, license: license);
+    } on ApiException catch (exception) {
+      actionError = exception.message;
+      _notify();
+      return DownloadActionResult(ok: false, message: exception.message);
+    } catch (_) {
+      actionError = 'downloadGrantFailed';
+      _notify();
+      return const DownloadActionResult(ok: false);
+    }
+  }
+
+  /// 更新设置，先本地展示，失败恢复服务端旧值。
+  Future<bool> updateSettings({bool? wifiOnly, String? maxQuality}) async {
+    final previous = policy;
+    if (previous != null) {
+      policy = previous.copyWith(wifiOnly: wifiOnly, maxQuality: maxQuality);
+      _notify();
+    }
+    try {
+      await _repository.updateSettings(
+        wifiOnly: wifiOnly,
+        maxQuality: maxQuality,
+      );
+      actionError = null;
+      return true;
+    } catch (_) {
+      policy = previous;
+      actionError = 'downloadSettingsFailed';
+      return false;
+    } finally {
+      _notify();
+    }
+  }
+
+  /// 删除单条授权，失败按原位置恢复。
+  Future<bool> remove(String episodeId) async {
+    final index = licenses.indexWhere((item) => item.episodeId == episodeId);
+    if (index < 0) return true;
+    final removed = licenses[index];
+    licenses = [...licenses]..removeAt(index);
+    actionError = null;
+    _notify();
+    try {
+      await _repository.remove(episodeId);
+      return true;
+    } catch (_) {
+      final restored = [...licenses];
+      restored.insert(
+        index > restored.length ? restored.length : index,
+        removed,
+      );
+      licenses = restored;
+      actionError = 'downloadDeleteFailed';
+      return false;
+    } finally {
+      _notify();
+    }
+  }
+
+  /// 清空授权，失败恢复原列表。
+  Future<bool> clear() async {
+    if (licenses.isEmpty) return true;
+    final previous = licenses;
+    licenses = const [];
+    clearing = true;
+    actionError = null;
+    _notify();
+    try {
+      await _repository.clear();
+      return true;
+    } catch (_) {
+      licenses = previous;
+      actionError = 'downloadClearFailed';
+      return false;
+    } finally {
+      clearing = false;
+      _notify();
+    }
+  }
+
+  /// 退出登录时清空账号相关状态，避免跨账号串联。
+  void reset() {
+    policy = null;
+    licenses = const [];
+    loading = false;
+    clearing = false;
+    error = null;
+    actionError = null;
+    _notify();
+  }
+
+  void _notify() {
+    if (!_disposed) notifyListeners();
+  }
+
+  @override
+  void dispose() {
+    _disposed = true;
+    super.dispose();
+  }
+}

lib/core/data/services/favorite_controller.dart

@@ -88,24 +88,23 @@ class FavoriteController extends ChangeNotifier {
 
   /// 取消收藏（"我的"页列表里删除某条）。
   Future<bool> remove(String dramaId) async {
-    final removed = cards.firstWhere(
-      (drama) => drama.id == dramaId,
-      orElse: () => const Drama(
-        id: '',
-        title: '',
-        synopsis: '',
-        posterUrl: '',
-      ),
-    );
-    final hadCard = removed.id.isNotEmpty;
+    final index = cards.indexWhere((drama) => drama.id == dramaId);
+    if (index < 0) return true;
+    final removed = cards[index];
     _saved.remove(dramaId);
-    cards = cards.where((drama) => drama.id != dramaId).toList();
+    final next = [...cards]..removeAt(index);
+    cards = next;
     notify();
     try {
       await _repository.remove(dramaId);
       return true;
     } catch (_) {
-      if (hadCard) cards = [...cards, removed];
+      final restored = [...cards];
+      restored.insert(
+        index > restored.length ? restored.length : index,
+        removed,
+      );
+      cards = restored;
       _saved.add(dramaId);
       notify();
       return false;

lib/core/data/services/watch_records_controller.dart

@@ -0,0 +1,205 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/foundation.dart';
+
+import '../models/drama.dart';
+import '../models/watch_progress.dart';
+import '../models/watch_record.dart';
+import '../repositories/catalog_repository.dart';
+import '../repositories/watch_history_repository.dart';
+
+/// 独立观看记录页状态。
+///
+/// 最近记录只下发 dramaId；详情按 dramaId 去重后补取，并以 4 个并发为上限。
+class WatchRecordsController extends ChangeNotifier {
+  factory WatchRecordsController({
+    required WatchHistoryRepository history,
+    required CatalogRepository catalog,
+    int limit = defaultLimit,
+  }) => WatchRecordsController._(history, catalog, limit);
+
+  WatchRecordsController._(this._history, this._catalog, this.limit);
+
+  static const int defaultLimit = 20;
+  static const int detailConcurrency = 4;
+
+  final WatchHistoryRepository _history;
+  final CatalogRepository _catalog;
+  final int limit;
+  final Map<String, Drama> _detailCache = {};
+
+  List<WatchRecord> records = const [];
+  bool loading = false;
+  bool clearing = false;
+  String? error;
+  String? actionError;
+  bool _disposed = false;
+
+  /// 加载最近记录并补齐详情；单条详情失败不拖垮整页。
+  Future<void> load() async {
+    loading = true;
+    error = null;
+    actionError = null;
+    _notify();
+    try {
+      final recent = await _history.recent(limit: limit);
+      if (_disposed) return;
+      records = _uniqueRecords(recent);
+      _notify();
+      await _hydrate(records.map((record) => record.dramaId).toList());
+    } catch (_) {
+      if (!_disposed) error = 'progressError';
+    } finally {
+      if (!_disposed) {
+        loading = false;
+        _notify();
+      }
+    }
+  }
+
+  /// 只重试一条详情失败记录。
+  Future<void> retryDetail(String dramaId) async {
+    final index = _recordIndex(dramaId);
+    if (index < 0) return;
+    _replaceAt(
+      index,
+      records[index].copyWith(detailLoading: true, detailFailed: false),
+    );
+    _notify();
+    await _loadDetail(dramaId);
+    _notify();
+  }
+
+  /// 删除单条记录，先更新 UI，失败按原位置回滚。
+  Future<bool> remove(String dramaId) async {
+    final index = _recordIndex(dramaId);
+    if (index < 0) return true;
+    final removed = records[index];
+    records = [...records]..removeAt(index);
+    actionError = null;
+    _notify();
+    try {
+      await _history.remove(dramaId);
+      return true;
+    } catch (_) {
+      final next = [...records];
+      next.insert(index > next.length ? next.length : index, removed);
+      records = next;
+      actionError = 'recordDeleteFailed';
+      return false;
+    } finally {
+      _notify();
+    }
+  }
+
+  /// 清空全部记录，先更新 UI，失败恢复原列表。
+  Future<bool> clear() async {
+    if (records.isEmpty) return true;
+    final previous = records;
+    records = const [];
+    clearing = true;
+    actionError = null;
+    _notify();
+    try {
+      await _history.clear();
+      return true;
+    } catch (_) {
+      records = previous;
+      actionError = 'recordClearFailed';
+      return false;
+    } finally {
+      clearing = false;
+      _notify();
+    }
+  }
+
+  List<WatchRecord> _uniqueRecords(List<WatchProgress> recent) {
+    final seen = <String>{};
+    return [
+      for (final progress in recent)
+        if (seen.add(progress.dramaId)) WatchRecord(progress: progress),
+    ];
+  }
+
+  Future<void> _hydrate(List<String> dramaIds) async {
+    final queue = [
+      for (final id in dramaIds)
+        if (!_detailCache.containsKey(id)) id,
+    ];
+    final workerCount = queue.length < detailConcurrency
+        ? queue.length
+        : detailConcurrency;
+    Future<void> worker() async {
+      while (queue.isNotEmpty && !_disposed) {
+        await _loadDetail(queue.removeAt(0));
+      }
+    }
+
+    await Future.wait([
+      for (var index = 0; index < workerCount; index++) worker(),
+    ]);
+  }
+
+  Future<void> _loadDetail(String dramaId) async {
+    final index = _recordIndex(dramaId);
+    if (index < 0) return;
+    final cached = _detailCache[dramaId];
+    if (cached != null) {
+      _replaceAt(
+        index,
+        records[index].copyWith(
+          drama: cached,
+          detailLoading: false,
+          detailFailed: false,
+        ),
+      );
+      return;
+    }
+    try {
+      final detail = await _catalog.fetchDrama(dramaId);
+      if (_disposed) return;
+      _detailCache[dramaId] = detail;
+      final current = _recordIndex(dramaId);
+      if (current < 0) return;
+      _replaceAt(
+        current,
+        records[current].copyWith(
+          drama: detail,
+          detailLoading: false,
+          detailFailed: false,
+        ),
+      );
+    } catch (_) {
+      if (_disposed) return;
+      final current = _recordIndex(dramaId);
+      if (current < 0) return;
+      _replaceAt(
+        current,
+        records[current].copyWith(detailLoading: false, detailFailed: true),
+      );
+    }
+  }
+
+  int _recordIndex(String dramaId) {
+    for (var index = 0; index < records.length; index++) {
+      if (records[index].dramaId == dramaId) return index;
+    }
+    return -1;
+  }
+
+  void _replaceAt(int index, WatchRecord record) {
+    final next = [...records];
+    next[index] = record;
+    records = next;
+  }
+
+  void _notify() {
+    if (!_disposed) notifyListeners();
+  }
+
+  @override
+  void dispose() {
+    _disposed = true;
+    super.dispose();
+  }
+}

lib/core/widgets/auth_gate.dart

@@ -9,9 +9,7 @@ import '../theme/app_colors.dart';
 /// 打开登录 / 注册页（沿用现有 Navigator 风格，不引路由库）
 Future<void> openAuthPage(BuildContext context, {bool signUpMode = false}) {
   return Navigator.of(context).push(
-    MaterialPageRoute<void>(
-      builder: (_) => AuthPage(signUpMode: signUpMode),
-    ),
+    MaterialPageRoute<void>(builder: (_) => AuthPage(signUpMode: signUpMode)),
   );
 }
 
@@ -81,3 +79,44 @@ Future<bool> ensureSignedIn(BuildContext context) async {
   }
   return false;
 }
+
+/// 页面级登录引导，用于记录、收藏和下载等必须登录的独立页面。
+class AuthGatePanel extends StatelessWidget {
+  const AuthGatePanel({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context)!;
+    return Center(
+      key: const Key('auth-gate-panel'),
+      child: Padding(
+        padding: const EdgeInsets.symmetric(horizontal: 32),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Text(
+              l10n.authGateTitle,
+              textAlign: TextAlign.center,
+              style: const TextStyle(
+                color: Colors.white,
+                fontSize: 18,
+                fontWeight: FontWeight.w800,
+              ),
+            ),
+            const SizedBox(height: 8),
+            Text(
+              l10n.authGateMessage,
+              textAlign: TextAlign.center,
+              style: const TextStyle(color: AppColors.muted, fontSize: 13),
+            ),
+            const SizedBox(height: 18),
+            FilledButton(
+              onPressed: () => openAuthPage(context),
+              child: Text(l10n.authGateAction),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/core/widgets/download_action.dart

@@ -0,0 +1,29 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+import '../../l10n/app_localizations.dart';
+import '../data/services/download_controller.dart';
+import 'auth_gate.dart';
+
+/// 详情页与播放页共用的下载授权入口。
+///
+/// 未登录先走登录闸；业务拒绝时直接展示后端 message。
+Future<void> requestEpisodeDownload(
+  BuildContext context,
+  String episodeId,
+) async {
+  if (!await ensureSignedIn(context)) return;
+  if (!context.mounted) return;
+  final result = await context.read<DownloadController>().grant(episodeId);
+  if (!context.mounted) return;
+  final l10n = AppLocalizations.of(context)!;
+  final hasBackendMessage = result.message?.trim().isNotEmpty ?? false;
+  final message = result.ok
+      ? l10n.downloadGranted
+      : hasBackendMessage
+      ? result.message!
+      : l10n.downloadGrantFailed;
+  ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(message)));
+}

lib/core/widgets/library_drama_tile.dart

@@ -0,0 +1,73 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/material.dart';
+
+import '../data/models/drama.dart';
+import '../theme/app_colors.dart';
+import 'remote_image.dart';
+
+/// 收藏等账号列表复用的剧集卡片，视觉与"我的"页列表保持一致。
+class LibraryDramaTile extends StatelessWidget {
+  const LibraryDramaTile({
+    super.key,
+    required this.drama,
+    required this.onTap,
+    this.trailing,
+  });
+
+  final Drama drama;
+  final VoidCallback? onTap;
+  final Widget? trailing;
+
+  @override
+  Widget build(BuildContext context) {
+    return Material(
+      color: const Color(0xFF1B1C21),
+      borderRadius: BorderRadius.circular(12),
+      clipBehavior: Clip.antiAlias,
+      child: InkWell(
+        onTap: onTap,
+        child: Padding(
+          padding: const EdgeInsets.all(9),
+          child: Row(
+            children: [
+              ClipRRect(
+                borderRadius: BorderRadius.circular(8),
+                child: RemoteImage(drama.posterUrl, width: 74, height: 103),
+              ),
+              const SizedBox(width: 11),
+              Expanded(
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Text(
+                      drama.title,
+                      maxLines: 2,
+                      overflow: TextOverflow.ellipsis,
+                      style: const TextStyle(
+                        color: Colors.white,
+                        fontSize: 15,
+                        fontWeight: FontWeight.w700,
+                      ),
+                    ),
+                    const SizedBox(height: 7),
+                    Text(
+                      drama.genre.isEmpty ? drama.category : drama.genre,
+                      maxLines: 1,
+                      overflow: TextOverflow.ellipsis,
+                      style: const TextStyle(
+                        color: AppColors.muted,
+                        fontSize: 12,
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+              ?trailing,
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}