feat(home): 首页按内容类型分频道 Feed 并支持分页

test/support/fake_catalog.dart

@@ -1,4 +1,5 @@
 import 'package:fruitshorts/core/data/models/drama.dart';
+import 'package:fruitshorts/core/data/models/feed_page.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';
@@ -18,6 +19,23 @@ class FakeCatalogRepository implements CatalogRepository, SearchRepository {
   @override
   Future<HomeFeed> fetchDiscoverFeed() async => _feed();
 
+  @override
+  Future<FeedPage> fetchFeed({
+    List<String> types = const [],
+    String? cursor,
+    int size = 10,
+  }) async {
+    final filtered = types.isEmpty
+        ? dramas
+        : dramas.where((drama) => _matchesFeedTypes(drama, types)).toList();
+    return FeedPage(dramas: filtered.take(size).toList());
+  }
+
+  bool _matchesFeedTypes(Drama drama, List<String> types) {
+    final dramaType = drama.id == 'the-signal-demo' ? 'ANIME' : 'LIVE';
+    return types.contains(dramaType);
+  }
+
   @override
   Future<Drama> fetchDrama(String dramaId) async {
     return dramas.firstWhere((drama) => drama.id == dramaId);