feat(editor): F4.6e the e-mail program and e-mail server on a computer's desktop

The oracle MailWindowRun uses Java's e-mail windows as a person does and
answers their dialogs. The core sets and saves the program's account,
deletes a mail, checks a form as Java's window does, and gives the server
its domain, new and removed accounts and the window's own line; the room
sends both programs' views and takes their actions; the editor has both
windows. Better than Java: a name field for a new account, a user name the
server has is refused, deleting hits the folder shown, a new domain goes
into the accounts file at once.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/core/test/programLines.ts

@@ -102,6 +102,11 @@ export function emailServerText(entry: EmailServerLogEntry, language: PageLangua
       return language === 'de' ? `Fehler beim Senden an ${entry.address}` : `Error while sending ${entry.address}`;
     case 'stored':
       return language === 'de' ? `E-Mail für ${entry.username} im Postfach gespeichert.` : `E-mail for ${entry.username} saved in mailbox.`;
+    case 'switched':
+      // `emailserver_msg2`, `emailserver_msg3`: the window's own line.
+      return language === 'de'
+        ? `POP3- und SMTP-Server wurden ${entry.active ? 'gestartet' : 'angehalten'}.`
+        : `POP3 and SMTP servers are ${entry.active ? 'activated' : 'stopped'}.`;
     default:
       return emailClientText(entry);
   }