feat(flutter): 榜单前三铺满与剧场分类吸顶下划线

test/discover/home_all_dramas_grid_test.dart

@@ -226,6 +226,27 @@ void main() {
     expect(header().color, AppColors.ink);
   });
 
+  testWidgets('should_show_category_underline_for_selection', (tester) async {
+    await _pumpTheater(tester, categoryRepository: _GridCategoryRepository());
+    Color underline(String id) =>
+        (tester
+                    .widget<Container>(
+                      find.byKey(Key('theater-category-underline-$id')),
+                    )
+                    .decoration!
+                as BoxDecoration)
+            .color!;
+
+    expect(underline('all'), AppColors.blue);
+    expect(underline('7'), Colors.transparent);
+
+    await tester.tap(find.byKey(const Key('theater-category-7')));
+    await tester.pumpAndSettle();
+
+    expect(underline('all'), Colors.transparent);
+    expect(underline('7'), AppColors.blue);
+  });
+
   testWidgets('should_use_compact_refresh_indicator', (tester) async {
     await _pumpTheater(tester, categoryRepository: _GridCategoryRepository());
     final indicator = tester.widget<RefreshIndicator>(
@@ -234,7 +255,7 @@ void main() {
 
     expect(indicator.color, AppColors.blue);
     expect(indicator.strokeWidth, 2);
-    expect(indicator.edgeOffset, 110);
+    expect(indicator.edgeOffset, 52);
   });
 }