opt: 视频播放页状态栏前景色

lib/pages/video/detail/view.dart

@@ -3,6 +3,7 @@ import 'dart:io';
 
 import 'package:extended_nested_scroll_view/extended_nested_scroll_view.dart';
 import 'package:floating/floating.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
 import 'package:flutter_svg/svg.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
@@ -594,10 +595,21 @@ class _VideoDetailPageState extends State<VideoDetailPage>
             key: vdCtr.scaffoldKey,
             appBar: PreferredSize(
               preferredSize: const Size.fromHeight(0),
-              child: AppBar(
+              child: StreamBuilder(
+                stream: appbarStream.stream.distinct(),
+                initialData: 0,
+                builder: ((context, snapshot) {
+                  return AppBar(
                     backgroundColor: Colors.black,
                     elevation: 0,
                     scrolledUnderElevation: 0,
+                    systemOverlayStyle: Get.isDarkMode
+                        ? SystemUiOverlayStyle.light
+                        : snapshot.data!.toDouble() > kToolbarHeight
+                            ? SystemUiOverlayStyle.dark
+                            : SystemUiOverlayStyle.light,
+                  );
+                }),
               ),
             ),
             body: ExtendedNestedScrollView(