mod: 侧边栏、动态重构，排行改为首页分区，平板、折叠屏、竖屏视频新适配，播放页可隐藏黑边、截图、点踩，弹幕粗细调整，默认关闭后台播放，弹窗接受返回

lib/pages/video/detail/introduction/widgets/intro_detail.dart

@@ -104,6 +104,7 @@ class IntroDetail extends StatelessWidget {
                         ),
                       ),
                     ),
+                    const SizedBox(height: 100),
                   ],
                 ),
               ),