style(home): 放大底部导航图标与文字

test/home/app_bottom_nav_test.dart

@@ -103,7 +103,7 @@ void main() {
     expect(selectedIcon.color, AppColors.navSelected);
     expect(
       tester.getSize(find.byIcon(Icons.movie_rounded)),
-      const Size(26, 26),
+      const Size.square(AppDimens.navIcon),
     );
     expect(
       tester.getTopLeft(find.text('Home')).dy -