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/lib/ai/services/chart-suggestion.service.ts

@@ -1,8 +1,11 @@
 /**
  * Chart Suggestion Service
  * Frontend service for calling the AI chart suggestions API
+ * NOW WITH FAST PARSER - skips AI when possible (< 50ms vs 2 minutes)
  */
 
+import { parseChartData, generateChartSuggestions } from '@/lib/chart/parser'
+
 export interface ChartSuggestion {
   type: 'bar' | 'horizontal-bar' | 'line' | 'area' | 'pie' | 'radar' | 'funnel' | 'gauge'
   title: string
@@ -64,6 +67,7 @@ function setCached(key: string, data: SuggestChartsResponse): void {
 
 /**
  * Call the AI chart suggestions API
+ * FAST PATH: Try regex parser first (< 50ms), only call AI if no data found
  * @param request - The request parameters
  * @returns Promise with the chart suggestions
  */
@@ -78,7 +82,29 @@ export async function suggestCharts(request: SuggestChartsRequest): Promise<Sugg
     return cached
   }
 
-  console.log('[suggestCharts] CACHE MISS - calling API')
+  console.log('[suggestCharts] CACHE MISS - trying fast parser first')
+
+  // FAST PATH: Try regex parser first - NO AI call needed!
+  const textToParse = request.selection || request.content || ''
+  const parsed = parseChartData(textToParse)
+
+  if (parsed.hasData && parsed.confidence > 0.3) {
+    console.log('[suggestCharts] FAST PATH - regex parser found data, skipping AI!')
+    const suggestions = generateChartSuggestions(parsed.data)
+
+    const response: SuggestChartsResponse = {
+      suggestions,
+      analyzedText: textToParse.substring(0, 200),
+      detectedData: `${parsed.data.length} data points found`,
+      hasData: true,
+    }
+
+    // Cache the fast result
+    setCached(cacheKey, response)
+    return response
+  }
+
+  console.log('[suggestCharts] Parser found no good data, calling AI API (slow...)')
 
   try {
     const response = await fetch('/api/ai/suggest-charts', {

memento-note/lib/ai/services/memory-echo.service.ts

@@ -96,6 +96,16 @@ export class MemoryEchoService {
    * Find meaningful connections between user's notes
    */
   async findConnections(userId: string, demoMode: boolean = false): Promise<NoteConnection[]> {
+    // GDPR AI Consent check — compliance skip if not granted (AC6)
+    const userSettings = await prisma.userAISettings.findUnique({
+      where: { userId },
+      select: { aiProcessingConsent: true },
+    })
+    if (!userSettings?.aiProcessingConsent) {
+      console.log(`[MemoryEchoService] User ${userId} has not given AI consent. Skipping connection generation for compliance.`)
+      return []
+    }
+
     // Ensure all notes have embeddings before searching for connections
     await this.ensureEmbeddings(userId)