Reapply "hide systembar when preview"

This reverts commit d6bce6aa63.

lib/plugin/pl_player/controller.dart

@@ -1474,7 +1474,7 @@ class PlPlayerController with BlockConfigMixin {
     try {
       if (status) {
         if (PlatformUtils.isMobile) {
-          hideStatusBar();
+          hideSystemBar();
           await changeOrientation(
             isVertical: isVertical,
             orientation: orientation,
@@ -1485,7 +1485,7 @@ class PlPlayerController with BlockConfigMixin {
       } else {
         if (PlatformUtils.isMobile) {
           if (!removeSafeArea) {
-            showStatusBar();
+            showSystemBar();
           }
           if (orientation == null && mode == .none) {
             return;
@@ -1632,7 +1632,7 @@ class PlPlayerController with BlockConfigMixin {
 
     _playerCount = 0;
     if (removeSafeArea) {
-      showStatusBar();
+      showSystemBar();
     }
     danmakuController = null;
     _stopOrientationListener();

lib/plugin/pl_player/utils/fullscreen.dart

@@ -62,21 +62,22 @@ Future<void>? fullMode() {
   );
 }
 
-bool _showStatusBar = true;
-Future<void>? hideStatusBar() {
-  if (!_showStatusBar) {
+bool _showSystemBar = true;
+bool get showSystemBar_ => _showSystemBar;
+Future<void>? hideSystemBar() {
+  if (!_showSystemBar) {
     return null;
   }
-  _showStatusBar = false;
+  _showSystemBar = false;
   return SystemChrome.setEnabledSystemUIMode(.immersiveSticky);
 }
 
 //退出全屏显示
-Future<void>? showStatusBar() {
-  if (_showStatusBar) {
+Future<void>? showSystemBar() {
+  if (_showSystemBar) {
     return null;
   }
-  _showStatusBar = true;
+  _showSystemBar = true;
   return SystemChrome.setEnabledSystemUIMode(
     Platform.isAndroid && Utils.sdkInt < 29 ? .manual : .edgeToEdge,
     overlays: SystemUiOverlay.values,