feat(flutter): 首页网格改为三列并首位显示全部

test/discover/home_all_dramas_grid_test.dart

@@ -25,7 +25,7 @@ void main() {
   });
 
   testWidgets(
-    'should_show_all_dramas_in_two_column_sliver_grid_without_continue_watching',
+    'should_show_all_dramas_in_three_column_sliver_grid_without_continue_watching',
     (tester) async {
       tester.view.physicalSize = const Size(390, 844);
       tester.view.devicePixelRatio = 1;
@@ -38,15 +38,21 @@ void main() {
 
       expect(find.text('Continue Watching'), findsNothing);
       expect(find.text('All Dramas'), findsOneWidget);
+      expect(find.text('All'), findsOneWidget);
+      expect(find.text('For You'), findsNothing);
+      expect(
+        tester.getCenter(find.text('All')).dx,
+        lessThan(tester.getCenter(find.text('Hot')).dx),
+      );
 
       final grid = tester.widget<SliverGrid>(
         find.byKey(const Key('home-all-dramas-grid')),
       );
       final delegate =
           grid.gridDelegate as SliverGridDelegateWithFixedCrossAxisCount;
-      expect(delegate.crossAxisCount, 2);
-      expect(delegate.crossAxisSpacing, 12);
-      expect(delegate.mainAxisSpacing, 16);
+      expect(delegate.crossAxisCount, 3);
+      expect(delegate.crossAxisSpacing, 10);
+      expect(delegate.mainAxisSpacing, 14);
       expect(delegate.childAspectRatio, closeTo(2 / 3, 0.001));
       expect(
         tester
@@ -154,7 +160,7 @@ void main() {
     expect(find.byKey(const Key('home-all-dramas-grid')), findsNothing);
   });
 
-  testWidgets('should_fit_two_column_grid_on_compact_screen', (tester) async {
+  testWidgets('should_fit_three_column_grid_on_compact_screen', (tester) async {
     tester.view.physicalSize = const Size(320, 568);
     tester.view.devicePixelRatio = 1;
     addTearDown(tester.view.resetPhysicalSize);