Revert "fix: macOS Media Control not activated & remove Background Play switch on desktop (#1872)"

This reverts commit 8f00ca5680.

lib/main.dart

@@ -123,8 +123,6 @@ void main() async {
         ),
       );
     }
-  } else if (Platform.isMacOS) {
-    await setupServiceLocator();
   }
 
   Request();

lib/pages/setting/models/play_settings.dart

@@ -183,7 +183,6 @@ List<SettingsModel> get playSettings => [
     defaultVal: true,
     onChanged: (value) => allowRotateScreen = value,
   ),
-  if (PlatformUtils.isMobile)
   const SwitchModel(
     title: '后台播放',
     subtitle: '进入后台时继续播放',

lib/pages/video/widgets/header_control.dart

@@ -565,16 +565,13 @@ class HeaderControlState extends State<HeaderControl>
                             );
                           },
                         ),
-                      if (PlatformUtils.isMobile)
                       Obx(
                         () => ActionRowLineItem(
                           iconData: Icons.play_circle_outline,
-                            onTap:
+                          onTap: plPlayerController.setContinuePlayInBackground,
-                                plPlayerController.setContinuePlayInBackground,
                           text: " 后台播放 ",
-                            selectStatus: plPlayerController
+                          selectStatus:
-                                .continuePlayInBackground
+                              plPlayerController.continuePlayInBackground.value,
-                                .value,
                         ),
                       ),
                     ],