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/hooks/use-auto-label-suggestion.ts

@@ -1,6 +1,7 @@
 import { useState, useEffect } from 'react'
 import { useSearchParams } from 'next/navigation'
 import { useSession } from 'next-auth/react'
+import { useAiConsent } from '@/components/legal/ai-consent-provider'
 
 /**
  * Hook to check if auto label suggestions should be shown for the current notebook
@@ -8,6 +9,7 @@ import { useSession } from 'next-auth/react'
  */
 export function useAutoLabelSuggestion() {
   const { data: session } = useSession()
+  const { hasAiConsent } = useAiConsent()
   const searchParams = useSearchParams()
   const [shouldSuggest, setShouldSuggest] = useState(false)
   const [notebookId, setNotebookId] = useState<string | null>(searchParams.get('notebook'))
@@ -23,11 +25,11 @@ export function useAutoLabelSuggestion() {
       setShouldSuggest(false)
 
       // Check if we should suggest labels for this notebook
-      if (currentNotebookId && session?.user?.id) {
+      if (currentNotebookId && session?.user?.id && hasAiConsent) {
         checkNotebookForSuggestions(currentNotebookId)
       }
     }
-  }, [searchParams, notebookId, session])
+  }, [searchParams, notebookId, session, hasAiConsent])
 
   const checkNotebookForSuggestions = async (nbId: string) => {
     try {