open sidebar on homepage pop

lib/widgets/pages/chat.dart

@@ -39,7 +39,12 @@ class const ChatPage({super.key}) extends HookConsumerWidget {
         final showMembersByDefault = constraints.maxWidth > 1000;
         final roomId = ref.watch(SelectedRoomController.provider);
 
-        return SafeArea(
+        return PopScope(
+          canPop: false,
+          onPopInvokedWithResult: (didPop, _) {
+            if (!didPop) scaffoldKey.currentState?.openDrawer();
+          },
+          child: SafeArea(
             child: Scaffold(
               key: scaffoldKey,
               appBar: initComplete ? null : Appbar(),
@@ -72,6 +77,7 @@ class const ChatPage({super.key}) extends HookConsumerWidget {
                     ),
               drawer: isDesktop || !initComplete ? null : Sidebar(),
             ),
+          ),
         );
       },
     );