feat: publication IA (magazine/brief/essay) + fixes critique

Publication IA:
- 4 templates (magazine, brief, essay, simple) avec CSS riche
- Rewrite IA (article/exercises/tutorial/reference/mixed)
- Modération avec timeout 12s + fallback safe
- Quotas publish_enhance par tier (basic=2, pro=15, business=100)
- Détection contenu stale (hash)
- Migration DB publishedContent/publishedTemplate/publishedSourceHash

Fixes:
- cheerio v1.2: Element -> AnyNode (domhandler), decodeEntities cast
- _isShared ajouté au type Note (champ virtuel serveur)
- callout colors PDF export: extraction fonction pure testable
- admin/published: guard note.userId null
- Cmd+S fonctionne en mode dialog (pas seulement fullPage)

i18n:
- 23 clés publish* traduites dans les 15 locales
- Extension Web Clipper: 13 locales mise à jour

Tests:
- callout-colors.test.ts (6 tests)
- note-visible-in-view.test.ts (5 tests)
- entitlements.test.ts + byok-entitlements.test.ts: mock usageLog + unstubAllEnvs
- 199/199 tests passent

Tracker: user-stories.md sync avec sprint-status.yaml

memento-note/components/landing-page.tsx

@@ -49,7 +49,7 @@ export function LandingPage() {
           <div className="w-10 h-10 bg-ink flex items-center justify-center rounded-xl shadow-lg rotate-3 group hover:rotate-0 transition-transform cursor-pointer">
             <span className="text-paper font-serif text-2xl font-bold">M</span>
           </div>
-          <span className="font-serif text-2xl font-medium tracking-tight">Momento</span>
+          <span className="font-serif text-2xl font-medium tracking-tight">Memento</span>
         </div>
 
         <div className="hidden md:flex items-center gap-10">
@@ -104,7 +104,7 @@ export function LandingPage() {
           {/* App Preview Mockup */}
           <motion.div initial={{ opacity: 0, y: 100 }} animate={{ opacity: 1, y: 0 }} transition={{ duration: 1, delay: 0.2, ease: [0.23, 1, 0.32, 1] }} className="mt-24 relative">
             <div className="relative mx-auto max-w-5xl aspect-[16/10] bg-white rounded-[32px] shadow-[0_40px_100px_-20px_rgba(0,0,0,0.15)] border border-border p-4 overflow-hidden group">
-              <img src="/images/workspace-hero.jpg" alt="Momento Workspace" className="w-full h-full object-cover rounded-2xl filter saturate-[0.8]" />
+              <img src="/images/workspace-hero.jpg" alt="Memento Workspace" className="w-full h-full object-cover rounded-2xl filter saturate-[0.8]" />
               <div className="absolute inset-0 bg-ink/10 group-hover:bg-ink/0 transition-colors duration-500" />
 
               <div className="absolute top-10 right-10 w-64 bg-paper/90 backdrop-blur-xl border border-border p-6 rounded-2xl shadow-2xl">
@@ -381,7 +381,7 @@ export function LandingPage() {
               <div className="w-8 h-8 bg-ink flex items-center justify-center rounded-lg">
                 <span className="text-paper font-serif text-lg font-bold">M</span>
               </div>
-              <span className="font-serif text-xl font-medium tracking-tight">Momento</span>
+              <span className="font-serif text-xl font-medium tracking-tight">Memento</span>
             </div>
             <p className="text-sm text-concrete font-light max-w-xs">{t('landing.footer.desc')}</p>
           </div>