neon: Cleanup finding account

packages/neon/neon/lib/src/blocs/accounts.dart

@@ -38,13 +38,13 @@ class AccountsBloc extends Bloc implements AccountsBlocEvents, AccountsBlocState
     final as = accounts.value;
     if (_globalOptions.rememberLastUsedAccount.value && _storage.containsKey(_keyLastUsedAccount)) {
       final lastUsedAccountID = _storage.getString(_keyLastUsedAccount);
-      activeAccount.add(as.singleWhere((final account) => account.id == lastUsedAccountID));
+      activeAccount.add(lastUsedAccountID != null ? as.find(lastUsedAccountID) : null);
     } else {
       unawaited(
         _globalOptions.initialAccount.stream.first.then((final lastAccount) {
-          final matches = as.where((final account) => account.id == lastAccount).toList();
-          if (matches.isNotEmpty) {
-            activeAccount.add(matches[0]);
+          final account = lastAccount != null ? as.find(lastAccount) : null;
+          if (account != null) {
+            activeAccount.add(account);
           }
         }),
       );

packages/neon/neon/lib/src/pages/home.dart

@@ -216,7 +216,7 @@ class _HomePageState extends State<HomePage> {
                       builder: (final context) {
                         if (accountsSnapshot.hasData) {
                           final accounts = accountsSnapshot.data!;
-                          final account = accounts.singleWhere((final account) => account.id == widget.account.id);
+                          final account = accounts.find(widget.account.id)!;
 
                           final isQuickBar = navigationMode == NavigationMode.quickBar;
                           final drawer = Drawer(
@@ -326,11 +326,8 @@ class _HomePageState extends State<HomePage> {
                                                                 )
                                                                 .toList(),
                                                             onChanged: (final id) {
-                                                              for (final account in accounts) {
-                                                                if (account.id == id) {
-                                                                  _accountsBloc.setActiveAccount(account);
-                                                                  break;
-                                                                }
+                                                              if (id != null) {
+                                                                _accountsBloc.setActiveAccount(accounts.find(id));
                                                               }
                                                             },
                                                           ),

packages/neon/neon/lib/src/pages/login.dart

@@ -61,13 +61,12 @@ class _LoginPageState extends State<LoginPage> {
             _accountsBloc.updateAccount(account);
             Navigator.of(context).pop();
           } else {
-            for (final a in _accountsBloc.accounts.value) {
-              if (a.id == account.id) {
+            final existingAccount = _accountsBloc.accounts.value.find(account.id);
+            if (existingAccount != null) {
               NeonException.showSnackbar(context, AppLocalizations.of(context).errorAccountAlreadyExists);
               await _loginBloc.refresh();
               return;
             }
-            }
             _accountsBloc
               ..addAccount(account)
               ..setActiveAccount(account);

packages/neon/neon/lib/src/utils/settings_export_helper.dart

@@ -33,13 +33,13 @@ class SettingsExportHelper {
 
     final accountsData = data['accounts'] as Map<String, dynamic>;
     for (final accountId in accountsData.keys) {
-      final matchingAccounts = accountSpecificOptions.keys.where((final account) => account.id == accountId).toList();
-      if (matchingAccounts.length != 1) {
+      final account = accountSpecificOptions.keys.toList().find(accountId);
+      if (account == null) {
         return;
       }
       final accountData = accountsData[accountId]! as Map<String, dynamic>;
       await _applyOptionsMapToOptions(
-        accountSpecificOptions[matchingAccounts[0]]!,
+        accountSpecificOptions[account]!,
         accountData,
       );
     }