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/components/notebook-summary-dialog.tsx

@@ -12,6 +12,7 @@ import {
 import { Loader2, FileText, RefreshCw, Download } from 'lucide-react'
 import { toast } from 'sonner'
 import { useLanguage } from '@/lib/i18n'
+import { useAiConsent } from '@/components/legal/ai-consent-provider'
 import type { NotebookSummary } from '@/lib/ai/services'
 import ReactMarkdown from 'react-markdown'
 
@@ -29,6 +30,7 @@ export function NotebookSummaryDialog({
   notebookName,
 }: NotebookSummaryDialogProps) {
   const { t } = useLanguage()
+  const { requestAiConsent } = useAiConsent()
   const [summary, setSummary] = useState<NotebookSummary | null>(null)
   const [loading, setLoading] = useState(false)
   const [regenerating, setRegenerating] = useState(false)
@@ -46,6 +48,9 @@ export function NotebookSummaryDialog({
   const fetchSummary = async () => {
     if (!notebookId) return
 
+    const consented = await requestAiConsent()
+    if (!consented) return
+
     setLoading(true)
     try {
       const response = await fetch('/api/ai/notebook-summary', {