fixed stale state after logout and replayed or lost share intents

lib/state/app/modules/nextcloud_capabilities/bloc/nextcloud_capabilities_cubit.dart

@@ -5,6 +5,7 @@ import 'package:hydrated_bloc/hydrated_bloc.dart';
 import '../../../../../api/demo/data/demo_capabilities.dart';
 import '../../../../../api/demo/demo_mode.dart';
 import '../../../../../api/marianumcloud/capabilities/get_nextcloud_capabilities.dart';
+import '../../../../../model/account_data.dart';
 import 'nextcloud_capabilities_state.dart';
 
 /// Holds the current user's Nextcloud `files_sharing` capabilities. Hydrated so
@@ -63,8 +64,12 @@ class NextcloudCapabilitiesCubit
       emit(DemoNextcloudCapabilities.state());
       return;
     }
+    final epoch = AccountData().sessionEpoch;
     try {
       final caps = await GetNextcloudCapabilities().run();
+      // A slow answer for the previous account must not decide the modules
+      // of the next one.
+      if (!AccountData().isCurrentSession(epoch)) return;
       emit(
         NextcloudCapabilitiesState(
           apiEnabled: caps.apiEnabled,