fix(home): 调整榜单版式并去掉二级分类

test/widget_test.dart

@@ -204,7 +204,7 @@ void main() {
     expect(find.byKey(const Key('home-grid')), findsOneWidget);
     expect(find.byKey(const Key('home-grid-cards')), findsOneWidget);
     expect(find.byKey(const Key('home-search-entry')), findsOneWidget);
-    expect(find.byKey(const Key('home-secondary-tags')), findsOneWidget);
+    expect(find.byKey(const Key('home-secondary-tags')), findsNothing);
     expect(tester.takeException(), isNull);
   });