feat(app): 搜索改为调用后端并渲染卡片结果

test/catalog/search_api_test.dart

@@ -0,0 +1,51 @@
+// Author: fruit.com.cn
+
+import 'dart:convert';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fruitshorts/core/data/remote/api_client.dart';
+import 'package:fruitshorts/core/data/remote/catalog_api.dart';
+
+import '../support/fake_http_adapter.dart';
+
+void main() {
+  test('should_request_search_with_keyword_and_paging_when_searching', () async {
+    final adapter = FakeHttpAdapter(
+      (options) async => FakeHttpResponse(
+        jsonEncode({
+          'code': 0,
+          'message': 'ok',
+          'data': {
+            'total': 1,
+            'list': [
+              {
+                'id': '2111012753262120962',
+                'title': 'Velvet Nights',
+                'synopsis': 'A city romance',
+                'cover': '/files/velvet.png',
+                'genre': 'Romance',
+                'totalEpisodes': 12,
+                'isHot': true,
+                'language': 'id',
+              },
+            ],
+          },
+        }),
+      ),
+    );
+    final api = CatalogApi(
+      ApiClient(baseUrl: 'http://127.0.0.1:8081', adapter: adapter),
+    );
+
+    final page = await api.search('velvet');
+
+    final request = adapter.requests.single;
+    expect(request.uri.path, '/app/search');
+    expect(request.queryParameters['keyword'], 'velvet');
+    expect(request.queryParameters['pageIndex'], '1');
+    expect(request.queryParameters['pageSize'], '20');
+    expect(page.total, 1);
+    expect(page.list.single.title, 'Velvet Nights');
+    expect(page.list.single.language, 'id');
+  });
+}

test/discover/discover_search_test.dart

@@ -0,0 +1,116 @@
+// Author: fruit.com.cn
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fruitshorts/core/data/models/drama.dart';
+import 'package:fruitshorts/core/data/models/search_result.dart';
+import 'package:fruitshorts/core/data/remote/api_exception.dart';
+import 'package:fruitshorts/core/data/repositories/search_repository.dart';
+import 'package:fruitshorts/pages/discover/discover_logic.dart';
+
+import '../support/fake_watch_history.dart';
+
+Drama _drama(String id, {String language = 'id'}) => Drama(
+  id: id,
+  title: id,
+  synopsis: 'synopsis',
+  posterUrl: '/files/$id.png',
+  language: language,
+  episodes: const [],
+);
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  test('should_query_backend_and_render_results_when_search_text_changes', () async {
+    final repository = _FakeSearchRepository(results: [_drama('velvet')]);
+    final logic = DiscoverLogic(
+      history: FakeWatchHistory(),
+      drama: _drama('signal'),
+      searchRepository: repository,
+    )..searchDebounce = Duration.zero;
+
+    logic.search.text = 'velvet';
+    logic.onSearchChanged();
+    await pumpEventQueue();
+
+    expect(repository.calls, [(keyword: 'velvet', pageIndex: 1, pageSize: 20)]);
+    expect(logic.searchLoading, isFalse);
+    expect(logic.visibleDramas(const []).single.id, 'velvet');
+    logic.dispose();
+  });
+
+  test('should_keep_server_results_when_text_only_loses_whitespace', () async {
+    final repository = _FakeSearchRepository(results: [_drama('velvet')]);
+    final logic = DiscoverLogic(
+      history: FakeWatchHistory(),
+      drama: _drama('signal'),
+      searchRepository: repository,
+    )..searchDebounce = Duration.zero;
+
+    logic.search.text = 'velvet ';
+    logic.onSearchChanged();
+    await pumpEventQueue();
+    logic.search.text = 'velvet';
+    logic.onSearchChanged();
+    await pumpEventQueue();
+
+    expect(repository.calls, hasLength(1));
+    expect(logic.visibleDramas(const []).single.id, 'velvet');
+    logic.dispose();
+  });
+
+  test('should_expose_error_message_when_search_fails', () async {
+    final logic = DiscoverLogic(
+      history: FakeWatchHistory(),
+      drama: _drama('signal'),
+      searchRepository: _FakeSearchRepository(
+        error: const ApiException(400, 'Keyword is invalid'),
+      ),
+    )..searchDebounce = Duration.zero;
+
+    logic.search.text = '%%%';
+    logic.onSearchChanged();
+    await pumpEventQueue();
+
+    expect(logic.searchError, 'Keyword is invalid');
+    expect(logic.searchLoading, isFalse);
+    logic.dispose();
+  });
+
+  test('should_clear_server_results_when_search_text_is_empty', () async {
+    final repository = _FakeSearchRepository(results: [_drama('velvet')]);
+    final logic = DiscoverLogic(
+      history: FakeWatchHistory(),
+      drama: _drama('signal'),
+      searchRepository: repository,
+    )..searchDebounce = Duration.zero;
+
+    logic.search.text = 'velvet';
+    logic.onSearchChanged();
+    await pumpEventQueue();
+    logic.search.clear();
+    logic.onSearchChanged();
+
+    expect(logic.visibleDramas([_drama('local')]).single.id, 'local');
+    logic.dispose();
+  });
+}
+
+class _FakeSearchRepository implements SearchRepository {
+  _FakeSearchRepository({this.results = const [], this.error});
+
+  final List<Drama> results;
+  final ApiException? error;
+  final List<({String keyword, int pageIndex, int pageSize})> calls = [];
+
+  @override
+  Future<SearchResult> search(
+    String keyword, {
+    int pageIndex = 1,
+    int pageSize = 20,
+  }) async {
+    calls.add((keyword: keyword, pageIndex: pageIndex, pageSize: pageSize));
+    if (error != null) throw error!;
+    return SearchResult(total: results.length, list: results);
+  }
+}

test/discover/home_all_dramas_grid_test.dart

@@ -428,6 +428,7 @@ Future<void> _pumpApp(
     LumaDramaApp(
       playerFactory: createWidgetPlayer,
       catalogRepository: catalog,
+      searchRepository: catalog,
       categoryRepository: categoryRepository,
       watchHistoryRepository: history ?? InMemoryWatchHistoryRepository(),
       favoriteRepository: InMemoryFavoriteRepository(),

test/support/fake_catalog.dart

@@ -1,9 +1,11 @@
-import 'package:fruitshorts/core/data/models/drama.dart';
+import 'package:fruitshorts/core/data/models/drama.dart';
 import 'package:fruitshorts/core/data/models/home_feed.dart';
+import 'package:fruitshorts/core/data/models/search_result.dart';
 import 'package:fruitshorts/core/data/repositories/catalog_repository.dart';
+import 'package:fruitshorts/core/data/repositories/search_repository.dart';
 
 /// 测试用目录数据：三部分区里的短剧，标题与后端演示数据保持一致。
-class FakeCatalogRepository implements CatalogRepository {
+class FakeCatalogRepository implements CatalogRepository, SearchRepository {
   FakeCatalogRepository({List<Drama>? dramas, this.banners = const []})
     : dramas = dramas ?? demoDramas;
 
@@ -21,6 +23,20 @@ class FakeCatalogRepository implements CatalogRepository {
     return dramas.firstWhere((drama) => drama.id == dramaId);
   }
 
+  @override
+  Future<SearchResult> search(
+    String keyword, {
+    int pageIndex = 1,
+    int pageSize = 20,
+  }) async {
+    final query = keyword.trim().toLowerCase();
+    final hits = dramas.where((drama) {
+      final haystack = [drama.title, drama.synopsis, drama.genre].join(' ');
+      return haystack.toLowerCase().contains(query);
+    }).toList();
+    return SearchResult(total: hits.length, list: hits);
+  }
+
   HomeFeed _feed() => HomeFeed(
     banners: banners,
     sections: [FeedSection(code: 'hot', title: '热门推荐', dramas: dramas)],
@@ -45,6 +61,7 @@ Drama _drama(String id, String title, String genre, {required int format}) =>
       synopsis: '$title synopsis',
       posterUrl: '/files/$id.png',
       genre: genre,
+      language: 'id',
       detailLoaded: true,
       episodes: [
         for (var index = 0; index < 7; index++)