feat(notes): liens internes, onglet Réseau, living blocks et consentement IA

Rend les liens entre notes visibles et persistants (sync NoteLink au save, auto-save, graphe réseau rafraîchi), ajoute living blocks, Memory Echo, recherche globale, consentement IA explicite et consolide les prototypes design en architectural-grid.

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

memento-note/app/api/ai/suggest-charts/route.ts

@@ -6,6 +6,7 @@ import { prisma } from '@/lib/prisma'
 import { auth } from '@/auth'
 import { checkEntitlementOrThrow, QuotaExceededError } from '@/lib/entitlements'
 import { trackFeatureUsage } from '@/lib/usage-tracker'
+import { hasUserAiConsent } from '@/lib/consent/server-consent'
 
 export const maxDuration = 30
 
@@ -39,6 +40,13 @@ export async function POST(req: Request) {
     console.error('[suggest-charts] NO SESSION')
     return new Response('Unauthorized', { status: 401 })
   }
+
+  if (!(await hasUserAiConsent())) {
+    return new Response(JSON.stringify({ error: 'ai_consent_required' }), {
+      status: 403,
+      headers: { 'Content-Type': 'application/json' },
+    })
+  }
   const userId = session.user.id
   console.log('[suggest-charts] userId:', userId)