email placeholder to remind users which address to check for their code

frontend/pweb/lib/l10n/en.arb

@@ -111,7 +111,13 @@
   "usersManagement": "User Management",
   "navigationOrganizationSettings": "Organization settings",
   "navigationAccountSettings": "Profile settings",
-  "twoFactorPrompt": "Enter the 6-digit code we sent to your device",
+  "twoFactorPrompt": "Enter the 6-digit code we sent to {email}",
+  "@twoFactorPrompt": {
+    "description": "Two-factor prompt showing the destination email address",
+    "placeholders": {
+      "email": {}
+    }
+  },
   "twoFactorResend": "Didn’t receive a code? Resend",
   "twoFactorTitle": "Two-Factor Authentication",
   "twoFactorError": "Invalid code. Please try again.",

frontend/pweb/lib/l10n/ru.arb

@@ -111,7 +111,13 @@
   "usersManagement": "Управление пользователями",
   "navigationOrganizationSettings": "Настройки организации",
   "navigationAccountSettings": "Настройки профиля",
-  "twoFactorPrompt": "Введите 6-значный код, отправленный на ваше устройство",
+  "twoFactorPrompt": "Введите 6-значный код, отправленный на {email}",
+  "@twoFactorPrompt": {
+    "description": "Two-factor prompt showing the destination email address",
+    "placeholders": {
+      "email": {}
+    }
+  },
   "twoFactorResend": "Не получили код? Отправить снова",
   "twoFactorTitle": "Двухфакторная аутентификация",
   "twoFactorError": "Неверный код. Пожалуйста, попробуйте снова.",

frontend/pweb/lib/pages/2fa/prompt.dart

@@ -1,5 +1,9 @@
 import 'package:flutter/material.dart';
 
+import 'package:provider/provider.dart';
+
+import 'package:pweb/providers/two_factor.dart';
+
 import 'package:pweb/generated/i18n/app_localizations.dart';
 
 
@@ -8,7 +12,9 @@ class TwoFactorPromptText extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) => Text(
-    AppLocalizations.of(context)!.twoFactorPrompt,
+    AppLocalizations.of(context)!.twoFactorPrompt(
+      context.watch<TwoFactorProvider>().pendingLogin?.destination ?? '',
+    ),
     style: Theme.of(context).textTheme.bodyLarge,
     textAlign: TextAlign.center,
   );