feat: Publication de pages — notes publiques sur URL

- Migration: champs isPublic + publicSlug + publishedAt sur Note
- Route publique /p/[slug] — rendu SSR sans auth, prose styled
- Server actions: publishNote / unpublishNote / getPublishedNote
- API /api/notes/publish — toggle publication + génération slug
- PublishDialog — modal avec lien copiable + bouton dépublier
- Bouton Globe dans le toolbar (vert si publiée)
- i18n FR/EN
- Pattern inspiré de BrainstormSession.isPublic

memento-note/app/(public)/p/[slug]/page.tsx

@@ -0,0 +1,67 @@
+import { notFound } from 'next/navigation'
+import { getPublishedNote } from '@/app/actions/notes-publishing'
+import { FileText, Calendar } from 'lucide-react'
+import { format } from 'date-fns'
+
+export async function generateMetadata({ params }: { params: Promise<{ slug: string }> }) {
+  const { slug } = await params
+  const note = await getPublishedNote(slug)
+  if (!note) return { title: 'Note not found' }
+  return { title: note.title || 'Published note', description: note.content?.replace(/<[^>]+>/g, '').slice(0, 160) }
+}
+
+export const dynamic = 'force-static'
+export const revalidate = 3600
+
+export default async function PublishedNotePage({ params }: { params: Promise<{ slug: string }> }) {
+  const { slug } = await params
+  const note = await getPublishedNote(slug)
+
+  if (!note) notFound()
+
+  return (
+    <div className="min-h-screen bg-[#F2F0E9] dark:bg-zinc-950">
+      <div className="max-w-3xl mx-auto px-6 py-12">
+        {/* Header */}
+        <div className="mb-8 pb-6 border-b border-black/10 dark:border-white/10">
+          <div className="flex items-center gap-2 text-xs text-muted-foreground mb-3">
+            <FileText size={14} />
+            <span>Note publiée</span>
+            {note.publishedAt && (
+              <>
+                <span>·</span>
+                <Calendar size={12} />
+                <span>{format(new Date(note.publishedAt), 'MMM d, yyyy')}</span>
+              </>
+            )}
+          </div>
+          <h1 className="text-3xl font-serif font-medium tracking-tight text-foreground leading-tight mb-2">
+            {note.title || 'Sans titre'}
+          </h1>
+          {note.user?.name && (
+            <p className="text-sm text-muted-foreground">par {note.user.name}</p>
+          )}
+        </div>
+
+        {/* Content */}
+        <article
+          dir="auto"
+          className="prose prose-stone dark:prose-invert max-w-none
+            prose-headings:font-serif prose-headings:font-medium
+            prose-p:leading-relaxed prose-p:text-[15px]
+            prose-pre:bg-zinc-100 prose-pre:dark:bg-zinc-900
+            prose-blockquote:border-brand-accent/40
+            prose-a:text-brand-accent"
+          dangerouslySetInnerHTML={{ __html: note.content || '' }}
+        />
+
+        {/* Footer */}
+        <div className="mt-12 pt-6 border-t border-black/10 dark:border-white/10 text-center">
+          <p className="text-xs text-muted-foreground">
+            Publié sur Momento
+          </p>
+        </div>
+      </div>
+    </div>
+  )
+}