feat(app): 搜索改为调用后端并渲染卡片结果

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(),