#281 viewer: block user swipes from the top status bar gesture insets

lib/widgets/common/basic/insets.dart

@@ -25,6 +25,26 @@ class BottomGestureAreaProtector extends StatelessWidget {
   }
 }
 
+// It will prevent the body from scrolling when a user swipe from top to show the status bar when system UI is hidden.
+class TopGestureAreaProtector extends StatelessWidget {
+  const TopGestureAreaProtector({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Positioned(
+      left: 0,
+      top: 0,
+      right: 0,
+      height: context.select<MediaQueryData, double>((mq) => mq.systemGestureInsets.top),
+      child: GestureDetector(
+        // absorb vertical gestures only
+        onVerticalDragDown: (details) {},
+        behavior: HitTestBehavior.translucent,
+      ),
+    );
+  }
+}
+
 // It will prevent the body from scrolling when a user swipe from edges to use Android Q style navigation gestures.
 class SideGestureAreaProtector extends StatelessWidget {
   const SideGestureAreaProtector({super.key});

lib/widgets/viewer/entry_viewer_stack.dart

@@ -277,6 +277,7 @@ class _EntryViewerStackState extends State<EntryViewerStack> with EntryViewContr
                 onViewDisposed: (mainEntry, pageEntry) => viewStateConductor.reset(pageEntry ?? mainEntry),
               ),
               ..._buildOverlays(),
+              const TopGestureAreaProtector(),
               const SideGestureAreaProtector(),
               const BottomGestureAreaProtector(),
             ],

lib/widgets/viewer/panorama_page.dart

@@ -136,6 +136,8 @@ class _PanoramaPageState extends State<PanoramaPage> {
                   ),
                 ),
               ),
+              const TopGestureAreaProtector(),
+              const SideGestureAreaProtector(),
               const BottomGestureAreaProtector(),
             ],
           ),

lib/widgets/wallpaper_page.dart

@@ -144,6 +144,7 @@ class _EntryEditorState extends State<EntryEditor> with EntryViewControllerMixin
             bottom: 0,
             child: _buildBottomOverlay(),
           ),
+          const TopGestureAreaProtector(),
           const SideGestureAreaProtector(),
           const BottomGestureAreaProtector(),
         ],