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/fusion-modal.tsx

@@ -9,6 +9,7 @@ import { X, Link2, Sparkles, Edit, Check } from 'lucide-react'
 import { cn } from '@/lib/utils'
 import { Note } from '@/lib/types'
 import { useLanguage } from '@/lib/i18n/LanguageProvider'
+import { useAiConsent } from '@/components/legal/ai-consent-provider'
 
 interface FusionModalProps {
   isOpen: boolean
@@ -31,6 +32,7 @@ export function FusionModal({
   onConfirmFusion
 }: FusionModalProps) {
   const { t } = useLanguage()
+  const { requestAiConsent } = useAiConsent()
   const [selectedNoteIds, setSelectedNoteIds] = useState<string[]>(notes.filter(n => n.id).map(n => n.id!))
   const [customPrompt, setCustomPrompt] = useState('')
   const [fusionPreview, setFusionPreview] = useState('')
@@ -52,8 +54,9 @@ export function FusionModal({
     setFusionPreview('')
 
     try {
-      
-      // Call AI API to generate fusion
+      const consented = await requestAiConsent()
+      if (!consented) return
+
       const res = await fetch('/api/ai/echo/fusion', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
@@ -81,7 +84,7 @@ export function FusionModal({
     } finally {
       setIsGenerating(false)
     }
-  }, [selectedNoteIds, customPrompt])
+  }, [selectedNoteIds, customPrompt, requestAiConsent])
 
   // Auto-generate fusion preview when modal opens with selected notes
   useEffect(() => {