added support for multiple accounts with an account switcher in settings

lib/state/app/infrastructure/utility_widgets/loadable_hydrated_bloc/loadable_hydrated_bloc.dart

@@ -126,6 +126,14 @@ abstract class LoadableHydratedBloc<
     add(Reset<TState>());
   }
 
+  // Blocs are rebuilt per account (see AccountScope). One that briefly
+  // outlives its account would otherwise load with the next account's
+  // credentials and persist the result into its own storage.
+  final int _ownSession = SessionManager().sessionEpoch;
+
+  /// Whether the account this bloc was created for is still the active one.
+  bool get ownsSession => SessionManager().isCurrentSession(_ownSession);
+
   static const _sessionKey = #loadableSessionEpoch;
 
   /// Runs [body] tagged with the current session: events it adds, also from
@@ -136,6 +144,7 @@ abstract class LoadableHydratedBloc<
 
   @override
   void add(LoadableHydratedBlocEvent<TState> event) {
+    if (!ownsSession) return;
     final epoch = Zone.current[_sessionKey];
     if (epoch is int && !SessionManager().isCurrentSession(epoch)) return;
     super.add(event);
@@ -173,6 +182,7 @@ abstract class LoadableHydratedBloc<
   final SessionSingleFlight _fetchFlight = SessionSingleFlight();
 
   void fetch() {
+    if (!ownsSession) return;
     unawaited(
       _fetchFlight.run(() {
         log('Fetching data for ${TState.toString()}');