feat: pages publiées utilisateur (settings) + fix import Shield dupliqué

- /settings/published : l'utilisateur voit ses notes publiées
  - Copier le lien, ouvrir, dépublier
  - API /api/user/published
- Onglet 'Mes pages' (Globe) dans la nav settings
- Fix: import Shield dupliqué dans admin-sidebar.tsx
- i18n FR/EN

memento-note/components/admin-sidebar.tsx

@@ -9,7 +9,6 @@ import {
   Shield,
   Settings,
   StickyNote,
-  Shield,
   ArrowLeft,
   User,
   LogOut,

memento-note/components/settings/SettingsNav.tsx

@@ -2,7 +2,7 @@
 
 import Link from 'next/link'
 import { usePathname } from 'next/navigation'
-import { Settings, Sparkles, Palette, User, Database, Info, Key, CreditCard, Plug } from 'lucide-react'
+import { Settings, Sparkles, Palette, User, Database, Info, Key, CreditCard, Plug, Globe } from 'lucide-react'
 import { useLanguage } from '@/lib/i18n'
 import { motion } from 'motion/react'
 
@@ -21,6 +21,7 @@ export function SettingsNav({ className }: SettingsNavProps) {
     { id: 'appearance', label: t('appearance.title'), icon: <Palette size={14} />, href: '/settings/appearance' },
     { id: 'profile', label: t('profile.title'), icon: <User size={14} />, href: '/settings/profile' },
     { id: 'data', label: t('dataManagement.title'), icon: <Database size={14} />, href: '/settings/data' },
+    { id: 'published', label: t('settings.publishedTitle') || 'Mes pages', icon: <Globe size={14} />, href: '/settings/published' },
     { id: 'integrations', label: t('integrations.title') || 'Intégrations', icon: <Plug size={14} />, href: '/settings/integrations' },
     { id: 'mcp', label: t('mcpSettings.title'), icon: <Key size={14} />, href: '/settings/mcp' },
     { id: 'about', label: t('about.title'), icon: <Info size={14} />, href: '/settings/about' },