feat: 简介默认展开

lib/pages/setting/extra_setting.dart

@@ -183,6 +183,14 @@ class _ExtraSettingState extends State<ExtraSetting> {
             setKey: SettingBoxKey.enableAi,
             defaultVal: true,
           ),
+          SetSwitchItem(
+            title: '视频简介默认展开',
+            setKey: SettingBoxKey.enableAutoExpand,
+            defaultVal: false,
+            callFn: (val) {
+              GlobalDataCache().enableAutoExpand = val;
+            },
+          ),
           const SetSwitchItem(
             title: '相关视频推荐',
             subTitle: '视频详情页推荐相关视频',

lib/pages/video/detail/introduction/view.dart

@@ -169,7 +169,8 @@ class _VideoInfoState extends State<VideoInfo> with TickerProviderStateMixin {
 
     owner = widget.videoDetail!.owner;
     enableAi = setting.get(SettingBoxKey.enableAi, defaultValue: true);
-    _expandableCtr = ExpandableController(initialExpanded: false);
+    _expandableCtr = ExpandableController(
+        initialExpanded: GlobalDataCache().enableAutoExpand);
   }
 
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