revert: foto de perfil e BIMI, para restaurar o servico

O site ficou a responder 502 em todos os hostnames depois do deploy destas
duas funcionalidades. A reversao vem primeiro; o diagnostico vem a seguir, com
o servico de pe.

As migracoes 0012 e 0013 ficam. Sao aditivas, nada no codigo revertido as usa,
e apaga-las deixaria a base de dados numa versao sem ficheiro correspondente,
o que parte o proprio migrate no arranque seguinte.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

services/webmail/src/app/(user)/user/layout.tsx

@@ -27,7 +27,7 @@ import { LanguageSwitcher } from "../../../i18n/LanguageSwitcher";
 import { useAccount, isAdminRole } from "../../../lib/useAccount";
 import { useFolders } from "../../../lib/useFolders";
 import { folderBadge, customFolders } from "../../../lib/mailCounts";
-import { Avatar } from "../../../components/Avatar";
+import { initialsFor } from "../../../lib/initials";
 
 export default function UserWebmailLayout({ children }: { children: React.ReactNode }) {
   const t = useTranslations();
@@ -279,7 +279,9 @@ export default function UserWebmailLayout({ children }: { children: React.ReactN
           onClick={() => setMobileOpen(false)}
           className="flex items-center gap-2.5 rounded-xl bg-dark-panel p-2.5 shadow-edge transition-colors hover:bg-dark-card"
         >
-          <Avatar address={account?.email} size={30} className="bg-indigo-900 text-indigo-300 shadow-[inset_0_0_0_1px_#5d5294]" />
+          <span className="flex h-[30px] w-[30px] flex-none items-center justify-center rounded-full bg-indigo-900 text-[12px] uppercase text-indigo-300 shadow-[inset_0_0_0_1px_#5d5294]">
+            {initialsFor(account?.email)}
+          </span>
           <span className="min-w-0 flex-1">
             <span
               className="block truncate text-[12.5px] leading-tight"