fix(home): 调整二级筛选按钮尺寸

test/home/home_preview_layout_test.dart

@@ -94,6 +94,18 @@ void main() {
     expect(find.byKey(const Key('home-section-category-社群')), findsOneWidget);
     expect(find.byKey(const Key('home-secondary-tags')), findsOneWidget);
     expect(find.byKey(const Key('home-grid-filter')), findsOneWidget);
+    expect(
+      tester.getSize(find.byKey(const Key('home-grid-filter'))),
+      const Size.square(AppDimens.tapTarget),
+    );
+    final filterIcon = tester.widget<Icon>(
+      find.descendant(
+        of: find.byKey(const Key('home-grid-filter')),
+        matching: find.byIcon(Icons.filter_list_rounded),
+      ),
+    );
+    expect(filterIcon.size, AppDimens.homeSecondaryFilterIcon);
+    expect(filterIcon.color, AppColors.textTertiary);
     final searchBox = find.descendant(
       of: find.byKey(const Key('home-search-entry')),
       matching: find.byType(Container),