feat(webmail): conversations - list, stacked reader, inline reply, settings switch

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

services/webmail/messages/en.json

@@ -548,5 +548,21 @@
     "signOutAll": "Sign out of all accounts",
     "active": "Active",
     "settings": "Account settings"
+  },
+  "conversations": {
+    "conversationView": "Group mail into conversations",
+    "conversationViewHint": "Show a message and its replies together, and whether you have answered.",
+    "messagesInConversation": "{count} messages",
+    "youReplied": "You replied",
+    "notReplied": "Not answered yet",
+    "expandAll": "Expand all",
+    "collapseOlder": "Collapse older",
+    "loadingMessage": "Loading message…",
+    "replyBelow": "Reply",
+    "conversationEmpty": "This conversation is empty.",
+    "me": "me",
+    "draftDiscarded": "Reply discarded",
+    "sentReply": "Reply sent",
+    "moreMessages": "Show {count} earlier messages"
   }
 }

services/webmail/messages/es.json

@@ -548,5 +548,21 @@
     "signOutAll": "Cerrar sesión en todas las cuentas",
     "active": "Activa",
     "settings": "Ajustes de la cuenta"
+  },
+  "conversations": {
+    "conversationView": "Agrupar el correo en conversaciones",
+    "conversationViewHint": "Muestra un mensaje y sus respuestas juntos, y si ya respondiste.",
+    "messagesInConversation": "{count} mensajes",
+    "youReplied": "Respondiste",
+    "notReplied": "Aún sin responder",
+    "expandAll": "Expandir todo",
+    "collapseOlder": "Contraer anteriores",
+    "loadingMessage": "Cargando mensaje…",
+    "replyBelow": "Responder",
+    "conversationEmpty": "Esta conversación está vacía.",
+    "me": "yo",
+    "draftDiscarded": "Respuesta descartada",
+    "sentReply": "Respuesta enviada",
+    "moreMessages": "Mostrar {count} mensajes anteriores"
   }
 }

services/webmail/messages/pt-BR.json

@@ -548,5 +548,21 @@
     "signOutAll": "Sair de todas as contas",
     "active": "Ativa",
     "settings": "Configurações da conta"
+  },
+  "conversations": {
+    "conversationView": "Agrupar e-mails em conversas",
+    "conversationViewHint": "Mostra uma mensagem e as respostas juntas, e se você já respondeu.",
+    "messagesInConversation": "{count} mensagens",
+    "youReplied": "Você respondeu",
+    "notReplied": "Ainda não respondida",
+    "expandAll": "Expandir tudo",
+    "collapseOlder": "Recolher anteriores",
+    "loadingMessage": "Carregando mensagem…",
+    "replyBelow": "Responder",
+    "conversationEmpty": "Esta conversa está vazia.",
+    "me": "eu",
+    "draftDiscarded": "Resposta descartada",
+    "sentReply": "Resposta enviada",
+    "moreMessages": "Mostrar {count} mensagens anteriores"
   }
 }