feat(webmail): account switcher for the several signed-in accounts

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

services/webmail/messages/en.json

@@ -533,5 +533,13 @@
     "zoom": "Zoom",
     "dragToPosition": "Drag to position",
     "notAnImage": "That file could not be read as an image."
+  },
+  "accounts": {
+    "switchAccount": "Switch account",
+    "addAccount": "Add another account",
+    "signOutOne": "Sign out of {email}",
+    "signOutAll": "Sign out of all accounts",
+    "active": "Active",
+    "settings": "Account settings"
   }
 }

services/webmail/messages/es.json

@@ -533,5 +533,13 @@
     "zoom": "Zoom",
     "dragToPosition": "Arrastre para posicionar",
     "notAnImage": "No se pudo leer ese archivo como imagen."
+  },
+  "accounts": {
+    "switchAccount": "Cambiar de cuenta",
+    "addAccount": "Añadir otra cuenta",
+    "signOutOne": "Cerrar sesión de {email}",
+    "signOutAll": "Cerrar sesión en todas las cuentas",
+    "active": "Activa",
+    "settings": "Ajustes de la cuenta"
   }
 }

services/webmail/messages/pt-BR.json

@@ -533,5 +533,13 @@
     "zoom": "Zoom",
     "dragToPosition": "Arraste para posicionar",
     "notAnImage": "Não foi possível ler esse arquivo como imagem."
+  },
+  "accounts": {
+    "switchAccount": "Trocar de conta",
+    "addAccount": "Adicionar outra conta",
+    "signOutOne": "Sair de {email}",
+    "signOutAll": "Sair de todas as contas",
+    "active": "Ativa",
+    "settings": "Configurações da conta"
   }
 }