feat(library): 支持设备追剧与观看历史

test/library/favorites_page_test.dart

@@ -187,22 +187,20 @@ void main() {
     expect(find.byKey(const Key('favorites-retry')), findsOneWidget);
   });
 
-  testWidgets(
-    'should_show_auth_gate_without_loading_favorites_when_signed_out',
-    (tester) async {
-      final auth = await _auth(signedIn: false);
-      final repository = InMemoryFavoriteRepository(
-        saved: {'signal'},
-        cards: [_card('signal')],
-      );
-      final favorites = FavoriteController(repository);
+  testWidgets('should_show_device_favorites_when_signed_out', (tester) async {
+    final auth = await _auth(signedIn: false);
+    final repository = InMemoryFavoriteRepository(
+      saved: {'signal'},
+      cards: [_card('signal')],
+    );
+    final favorites = FavoriteController(repository);
 
-      await _pumpPage(tester, auth: auth, favorites: favorites);
+    await _pumpPage(tester, auth: auth, favorites: favorites);
 
-      expect(find.byKey(const Key('auth-gate-panel')), findsOneWidget);
-      expect(repository.pageCalls, 0);
-    },
-  );
+    expect(find.byKey(const Key('auth-gate-panel')), findsNothing);
+    expect(find.text('Drama signal'), findsOneWidget);
+    expect(repository.pageCalls, 1);
+  });
 
   testWidgets('should_open_player_when_favorite_card_is_tapped', (
     tester,