Show linked domains on cards and fix Email leftovers.

Display hosted_sites on account cards, scope Afia and Settings to hosting,
add hosting_settings for notifications, and remove mailbox UI from the
hosting layout and account pages.

Co-authored-by: Cursor <cursoragent@cursor.com>

resources/views/hosting/dashboard.blade.php

@@ -57,9 +57,10 @@
                     @endphp
                     <a href="{{ $accountUrl }}" class="flex items-center justify-between px-5 py-3.5 transition hover:bg-slate-50">
                         <div class="min-w-0">
-                            <p class="truncate text-sm font-medium text-slate-900">{{ $account->primary_domain ?: $account->username }}</p>
+                            <p class="truncate text-sm font-medium text-slate-900">{{ $account->linkedDomainLabel() ?? $account->username }}</p>
                             <p class="mt-0.5 text-xs text-slate-400">
-                                {{ $account->product?->name ?? 'Hosting' }}
+                                {{ $account->username }}
+                                · {{ $account->product?->name ?? 'Hosting' }}
                                 · {{ $account->sites->count() }} {{ Str::plural('domain', $account->sites->count()) }}
                                 @if ($account->expires_at)
                                     · Expires {{ $account->expires_at->format('d M Y') }}