mod: 默认开启后台播放

lib/pages/setting/play_setting.dart

@@ -135,7 +135,7 @@ class _PlaySettingState extends State<PlaySetting> {
             title: '后台播放',
             subTitle: '进入后台时继续播放',
             setKey: SettingBoxKey.enableBackgroundPlay,
-            defaultVal: false,
+            defaultVal: true,
           ),
           if (Platform.isAndroid)
             SetSwitchItem(
@@ -146,7 +146,7 @@ class _PlaySettingState extends State<PlaySetting> {
                 callFn: (val) {
                   if (val &&
                       !setting.get(SettingBoxKey.enableBackgroundPlay,
-                          defaultValue: false)) {
+                          defaultValue: true)) {
                     SmartDialog.showToast('建议开启后台播放');
                   }
                 }),

lib/pages/video/detail/widgets/header_control.dart

@@ -1291,7 +1291,7 @@ class _HeaderControlState extends State<HeaderControl> {
                     if (canUsePiP) {
                       bool enableBackgroundPlay = setting.get(
                           SettingBoxKey.enableBackgroundPlay,
-                          defaultValue: false);
+                          defaultValue: true);
                       if (!enableBackgroundPlay) {
                         // SmartDialog.showToast('建议开启【后台播放】功能\n避免画中画没有暂停按钮');
                         // await Future.delayed(const Duration(seconds: 2), () {