added support for multiple accounts, guardian login bugfixes, ui changes

lib/state/app/modules/account/bloc/account_bloc.dart

@@ -4,12 +4,38 @@ import 'account_event.dart';
 import 'account_state.dart';
 
 class AccountBloc extends Bloc<AccountEvent, AccountState> {
-  AccountBloc({AccountStatus initialStatus = AccountStatus.undefined})
-    : super(AccountState(status: initialStatus)) {
+  AccountBloc({
+    AccountStatus initialStatus = AccountStatus.undefined,
+    String? accountId,
+  }) : super(AccountState(status: initialStatus, accountId: accountId)) {
     on<AccountStatusChanged>(
-      (event, emit) => emit(state.copyWith(status: event.status)),
+      (event, emit) => emit(
+        AccountState(
+          status: event.status,
+          accountId: event.status == AccountStatus.loggedOut
+              ? null
+              : state.accountId,
+        ),
+      ),
+    );
+    on<AccountActivated>(
+      (event, emit) => emit(
+        AccountState(
+          status: AccountStatus.loggedIn,
+          accountId: event.accountId,
+          freshLogin: event.freshLogin,
+        ),
+      ),
     );
   }
 
   void setStatus(AccountStatus status) => add(AccountStatusChanged(status));
+
+  /// [accountId] became the active account (login, switch or takeover after a
+  /// sign-out); null means no account is left.
+  void activated(String? accountId, {bool freshLogin = false}) => add(
+    accountId == null
+        ? const AccountStatusChanged(AccountStatus.loggedOut)
+        : AccountActivated(accountId, freshLogin: freshLogin),
+  );
 }