Add Mailing lists to Administration

A mailing list is an address that passes mail on to everyone on it. To
Stalwart it is its own object, x:MailingList, behind sysMailingList*, so
it gets its own section under Directory after Groups: search, fifty to a
page with each list's recipient count, and a panel to create, edit and
delete one.

Recipients are a property of the list, so unlike a group's members they
save with the rest of the panel. What Save sends for them is only what was
added and removed, one recipients/<address> pointer each -- the patch the
live server accepted -- so a recipient added elsewhere while the panel was
open is not taken out. They can be pasted several at a time, from a
spreadsheet column, a comma-separated line or Name <address>; anything with
an @ that is not an address stays in the box with a note. Past a dozen, a
filter narrows them.

That is all a list is in Stalwart -- no owners, moderation or posting
rules -- so that is all the panel offers.

The mock answers x:MailingList with two lists, the recipient set's live
shape, and the refusals a wrong address, a clash with an account and a
missing permission get.

Twenty-five new strings and one plural, in all nine catalogues.

web/src/locales/fr.ts

@@ -179,6 +179,31 @@ export const catalog: Catalog = {
     "Your organisation has reached the number of groups it is allowed.": "Votre organisation a atteint le nombre de groupes autorisé.",
     "This group no longer exists. Someone may have deleted it.": "Ce groupe n’existe plus. Quelqu’un l’a peut-être supprimé.",
     "The server did not say whether the group was created.": "Le serveur n’a pas indiqué si le groupe a été créé.",
+    "Mailing lists": "Listes de diffusion",
+    "Mailing list": "Liste de diffusion",
+    "A list needs an address.": "Une liste a besoin d’une adresse.",
+    "New mailing list": "Nouvelle liste de diffusion",
+    "Your role lets you view mailing lists but not change them.": "Votre rôle vous permet de consulter les listes de diffusion, mais pas de les modifier.",
+    "No domains are available to create a list on.": "Aucun domaine n’est disponible pour créer une liste.",
+    "Mail to these addresses goes to the list too. Changes apply when you save.": "Les messages envoyés à ces adresses vont aussi à la liste. Les modifications s’appliquent à l’enregistrement.",
+    "Create list": "Créer la liste",
+    "Filter recipients": "Filtrer les destinataires",
+    "No recipients match": "Aucun destinataire ne correspond",
+    "Add recipients": "Ajouter des destinataires",
+    "Addresses, separated by commas": "Adresses séparées par des virgules",
+    "Not added, as they aren't addresses: {items}": "Non ajoutés, car ce ne sont pas des adresses : {items}",
+    "Mail to the list is passed on to every recipient, on this server or anywhere else. Paste several at once if you like. Changes apply when you save.": "Les messages envoyés à la liste sont transmis à chaque destinataire, sur ce serveur ou ailleurs. Vous pouvez en coller plusieurs à la fois. Les modifications s’appliquent à l’enregistrement.",
+    "Mail to this address stops being passed on. The recipients' own mail is untouched.": "Les messages envoyés à cette adresse ne sont plus transmis. Les messages des destinataires eux-mêmes ne sont pas touchés.",
+    "Delete list…": "Supprimer la liste…",
+    "Delete list": "Supprimer la liste",
+    "Mail to this address is no longer passed on to anyone. It can't be undone.": "Les messages envoyés à cette adresse ne sont plus transmis à personne. C’est irréversible.",
+    "Addresses that pass mail on to everyone on them.": "Des adresses qui transmettent les messages à tous leurs destinataires.",
+    "Search mailing lists": "Rechercher des listes de diffusion",
+    "No mailing lists match": "Aucune liste de diffusion ne correspond",
+    "No mailing lists yet": "Aucune liste de diffusion pour l’instant",
+    "Your organisation has reached the number of mailing lists it is allowed.": "Votre organisation a atteint le nombre de listes de diffusion autorisé.",
+    "This mailing list no longer exists. Someone may have deleted it.": "Cette liste de diffusion n’existe plus. Quelqu’un l’a peut-être supprimée.",
+    "The server did not say whether the list was created.": "Le serveur n’a pas indiqué si la liste a été créée.",
     "User": "Utilisateur",
     "Administrator": "Administrateur",
     "Custom role": "Rôle personnalisé",
@@ -1574,6 +1599,7 @@ export const catalog: Catalog = {
     "{n} groups": { one: "{n} groupe", other: "{n} groupes" },
     "Its {n} members are taken out of the group first, and lose what was shared with it. The group's own mail is removed in the background, and it can't be undone.": { one: "Son {n} membre est d’abord retiré du groupe et perd ce qui était partagé avec lui. Les messages du groupe sont supprimés en arrière-plan, et c’est irréversible.", other: "Ses {n} membres sont d’abord retirés du groupe et perdent ce qui était partagé avec lui. Les messages du groupe sont supprimés en arrière-plan, et c’est irréversible." },
     "{n} mailing lists": { one: "{n} liste de diffusion", other: "{n} listes de diffusion" },
+    "{n} recipients": { one: "{n} destinataire", other: "{n} destinataires" },
     "{n} DKIM keys": { one: "{n} clé DKIM", other: "{n} clés DKIM" },
     "{n} other items": { one: "{n} autre élément", other: "{n} autres éléments" },
     // ── Administration ────────────────────────────────────────────────