i18n(mail): add namespace JSONs (de/en/es/fr/it)

Adds list_view sub-namespace covering compose action, loading + retry,
empty states (title + hint), compose form (heading, to/subject/body
placeholders, cancel/send/sending), thread detail (sender_unknown,
to-prefix), empty-detail prompt, and 6 context-menu items.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/mana/apps/web/src/lib/i18n/locales/mail/de.json

@@ -0,0 +1,25 @@
+{
+	"list_view": {
+		"action_compose": "Neue Mail",
+		"loading": "Lade Mails...",
+		"action_retry": "Erneut versuchen",
+		"empty_title": "Keine Mails",
+		"empty_hint": "Dein Postfach ist leer.",
+		"compose_heading": "Neue Nachricht",
+		"placeholder_to": "An",
+		"placeholder_subject": "Betreff",
+		"placeholder_body": "Nachricht schreiben...",
+		"action_cancel": "Abbrechen",
+		"action_send": "Senden",
+		"action_sending": "Wird gesendet...",
+		"sender_unknown": "Unbekannt",
+		"thread_to_prefix": "An:",
+		"empty_detail": "Wähle eine Nachricht aus",
+		"ctx_mark_unread": "Als ungelesen",
+		"ctx_mark_read": "Als gelesen",
+		"ctx_unstar": "Stern entfernen",
+		"ctx_star": "Markieren",
+		"ctx_archive": "Archivieren",
+		"ctx_delete": "Löschen"
+	}
+}

apps/mana/apps/web/src/lib/i18n/locales/mail/en.json

@@ -0,0 +1,25 @@
+{
+	"list_view": {
+		"action_compose": "New mail",
+		"loading": "Loading mails…",
+		"action_retry": "Try again",
+		"empty_title": "No mails",
+		"empty_hint": "Your inbox is empty.",
+		"compose_heading": "New message",
+		"placeholder_to": "To",
+		"placeholder_subject": "Subject",
+		"placeholder_body": "Write your message…",
+		"action_cancel": "Cancel",
+		"action_send": "Send",
+		"action_sending": "Sending…",
+		"sender_unknown": "Unknown",
+		"thread_to_prefix": "To:",
+		"empty_detail": "Select a message",
+		"ctx_mark_unread": "Mark unread",
+		"ctx_mark_read": "Mark read",
+		"ctx_unstar": "Remove star",
+		"ctx_star": "Star",
+		"ctx_archive": "Archive",
+		"ctx_delete": "Delete"
+	}
+}

apps/mana/apps/web/src/lib/i18n/locales/mail/es.json

@@ -0,0 +1,25 @@
+{
+	"list_view": {
+		"action_compose": "Nuevo correo",
+		"loading": "Cargando correos…",
+		"action_retry": "Reintentar",
+		"empty_title": "Sin correos",
+		"empty_hint": "Tu bandeja está vacía.",
+		"compose_heading": "Nuevo mensaje",
+		"placeholder_to": "Para",
+		"placeholder_subject": "Asunto",
+		"placeholder_body": "Escribe tu mensaje…",
+		"action_cancel": "Cancelar",
+		"action_send": "Enviar",
+		"action_sending": "Enviando…",
+		"sender_unknown": "Desconocido",
+		"thread_to_prefix": "Para:",
+		"empty_detail": "Selecciona un mensaje",
+		"ctx_mark_unread": "Marcar no leído",
+		"ctx_mark_read": "Marcar leído",
+		"ctx_unstar": "Quitar estrella",
+		"ctx_star": "Marcar",
+		"ctx_archive": "Archivar",
+		"ctx_delete": "Eliminar"
+	}
+}

apps/mana/apps/web/src/lib/i18n/locales/mail/fr.json

@@ -0,0 +1,25 @@
+{
+	"list_view": {
+		"action_compose": "Nouveau mail",
+		"loading": "Chargement des mails…",
+		"action_retry": "Réessayer",
+		"empty_title": "Aucun mail",
+		"empty_hint": "Ta boîte de réception est vide.",
+		"compose_heading": "Nouveau message",
+		"placeholder_to": "À",
+		"placeholder_subject": "Objet",
+		"placeholder_body": "Écris ton message…",
+		"action_cancel": "Annuler",
+		"action_send": "Envoyer",
+		"action_sending": "Envoi…",
+		"sender_unknown": "Inconnu",
+		"thread_to_prefix": "À :",
+		"empty_detail": "Sélectionne un message",
+		"ctx_mark_unread": "Marquer non lu",
+		"ctx_mark_read": "Marquer lu",
+		"ctx_unstar": "Retirer l'étoile",
+		"ctx_star": "Marquer",
+		"ctx_archive": "Archiver",
+		"ctx_delete": "Supprimer"
+	}
+}

apps/mana/apps/web/src/lib/i18n/locales/mail/it.json

@@ -0,0 +1,25 @@
+{
+	"list_view": {
+		"action_compose": "Nuova mail",
+		"loading": "Caricamento mail…",
+		"action_retry": "Riprova",
+		"empty_title": "Nessuna mail",
+		"empty_hint": "La tua casella è vuota.",
+		"compose_heading": "Nuovo messaggio",
+		"placeholder_to": "A",
+		"placeholder_subject": "Oggetto",
+		"placeholder_body": "Scrivi il messaggio…",
+		"action_cancel": "Annulla",
+		"action_send": "Invia",
+		"action_sending": "Invio…",
+		"sender_unknown": "Sconosciuto",
+		"thread_to_prefix": "A:",
+		"empty_detail": "Seleziona un messaggio",
+		"ctx_mark_unread": "Segna non letto",
+		"ctx_mark_read": "Segna letto",
+		"ctx_unstar": "Rimuovi stella",
+		"ctx_star": "Segna con stella",
+		"ctx_archive": "Archivia",
+		"ctx_delete": "Elimina"
+	}
+}