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/auto-label-suggestion-dialog.tsx

@@ -12,6 +12,7 @@ import {
 import { Sparkles, CheckCircle2, Loader2, Tag } from 'lucide-react'
 import { toast } from 'sonner'
 import { useLanguage } from '@/lib/i18n'
+import { useAiConsent } from '@/components/legal/ai-consent-provider'
 import type { AutoLabelSuggestion, SuggestedLabel } from '@/lib/ai/services'
 import { cn } from '@/lib/utils'
 
@@ -29,6 +30,7 @@ export function AutoLabelSuggestionDialog({
   onLabelsCreated,
 }: AutoLabelSuggestionDialogProps) {
   const { t } = useLanguage()
+  const { requestAiConsent } = useAiConsent()
   const [suggestions, setSuggestions] = useState<AutoLabelSuggestion | null>(null)
   const [loading, setLoading] = useState(false)
   const [creating, setCreating] = useState(false)
@@ -46,6 +48,9 @@ export function AutoLabelSuggestionDialog({
   const fetchSuggestions = async () => {
     if (!notebookId) return
 
+    const consented = await requestAiConsent()
+    if (!consented) return
+
     setLoading(true)
     try {
       const response = await fetch('/api/ai/auto-labels', {