fix: replace raw ai_consent_required code with translatable message and consent prompt

- Centralize AI consent 403 responses in server-consent helpers
- Return human-readable message + code + i18n errorKey from all AI APIs
- Update dashboard and AI clients to detect code/errorKey and translate
- Add consent.ai.requiredToast i18n keys (fr/en)

memento-note/app/api/ai/auto-labels/route.ts

@@ -3,7 +3,7 @@ import { NextRequest, NextResponse } from 'next/server'
 import { auth } from '@/auth'
 import { autoLabelCreationService } from '@/lib/ai/services'
 import { getAISettings } from '@/app/actions/ai-settings'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenJson } from '@/lib/consent/server-consent'
 import { withAiQuota, handleQuotaHttpError } from '@/lib/ai-quota'
 
 /**
@@ -23,10 +23,7 @@ export async function POST(request: NextRequest) {
 
     // GDPR AI Consent check
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json(
-        { success: false, error: 'ai_consent_required' },
-        { status: 403 }
-      )
+      return aiConsentForbiddenJson()
     }
 
     // Respect user's autoLabeling toggle

memento-note/app/api/ai/batch-organize/route.ts

@@ -1,7 +1,7 @@
 import { NextRequest, NextResponse } from 'next/server'
 import { auth } from '@/auth'
 import { batchOrganizationService } from '@/lib/ai/services'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenJson } from '@/lib/consent/server-consent'
 import { reserveUsageOrThrow, QuotaExceededError } from '@/lib/entitlements'
 
 /**
@@ -20,10 +20,7 @@ export async function POST(request: NextRequest) {
 
     // GDPR AI Consent check
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json(
-        { success: false, error: 'ai_consent_required' },
-        { status: 403 }
-      )
+      return aiConsentForbiddenJson()
     }
 
     // Get language from request headers or body

memento-note/app/api/ai/describe-image/route.ts

@@ -2,7 +2,7 @@ import { NextRequest, NextResponse } from 'next/server'
 import { auth } from '@/auth'
 import { getAISettings } from '@/app/actions/ai-settings'
 import { describeImages } from '@/lib/ai/services/image-description.service'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 import { withAiQuota, handleQuotaHttpError } from '@/lib/ai-quota'
 
 export async function POST(req: NextRequest) {
@@ -13,7 +13,7 @@ export async function POST(req: NextRequest) {
     }
 
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json({ error: 'ai_consent_required' }, { status: 403 })
+      return aiConsentForbiddenResponse()
     }
 
     const userSettings = await getAISettings(session.user.id)

memento-note/app/api/ai/echo/connections/route.ts

@@ -1,7 +1,7 @@
 import { NextRequest, NextResponse } from 'next/server'
 import { auth } from '@/auth'
 import { memoryEchoService } from '@/lib/ai/services/memory-echo.service'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 
 /**
  * GET /api/ai/echo/connections?noteId={id}&page={page}&limit={limit}
@@ -19,10 +19,7 @@ export async function GET(req: NextRequest) {
     }
 
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json(
-        { error: 'ai_consent_required' },
-        { status: 403 }
-      )
+      return aiConsentForbiddenResponse()
     }
 
     // Get query parameters

memento-note/app/api/ai/echo/fusion/route.ts

@@ -3,7 +3,7 @@ import { auth } from '@/auth'
 import { getChatProvider } from '@/lib/ai/factory'
 import { getSystemConfig } from '@/lib/config'
 import prisma from '@/lib/prisma'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 import { withAiQuota, handleQuotaHttpError } from '@/lib/ai-quota'
 
 /**
@@ -22,7 +22,7 @@ export async function POST(req: NextRequest) {
     }
 
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json({ error: 'ai_consent_required' }, { status: 403 })
+      return aiConsentForbiddenResponse()
     }
 
     const body = await req.json()

memento-note/app/api/ai/echo/route.ts

@@ -1,7 +1,7 @@
 import { NextRequest, NextResponse } from 'next/server'
 import { auth } from '@/auth'
 import { memoryEchoService } from '@/lib/ai/services/memory-echo.service'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 import { reserveUsageOrThrow, QuotaExceededError } from '@/lib/entitlements'
 
 /**
@@ -21,10 +21,7 @@ export async function GET(req: NextRequest) {
 
     // GDPR AI Consent check
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json(
-        { error: 'ai_consent_required' },
-        { status: 403 }
-      )
+      return aiConsentForbiddenResponse()
     }
 
     // Get next insight (respects frequency limits)

memento-note/app/api/ai/enrich-from-resource/route.ts

@@ -2,7 +2,7 @@ import { NextRequest, NextResponse } from 'next/server'
 import { auth } from '@/auth'
 import { getSystemConfig } from '@/lib/config'
 import { getTagsProvider } from '@/lib/ai/factory'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 import { withAiQuota, handleQuotaHttpError } from '@/lib/ai-quota'
 
 export async function POST(request: NextRequest) {
@@ -13,7 +13,7 @@ export async function POST(request: NextRequest) {
     }
 
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json({ error: 'ai_consent_required' }, { status: 403 })
+      return aiConsentForbiddenResponse()
     }
 
     const { existingContent, resourceText, mode, language, format } = await request.json()

memento-note/app/api/ai/notebook-slides/route.ts

@@ -0,0 +1,62 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { auth } from '@/auth'
+import { withAiQuota, handleQuotaHttpError } from '@/lib/ai-quota'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
+import { generateSlideDeck } from '@/lib/ai/services/slide-deck-generator.service'
+
+export async function POST(request: NextRequest) {
+  try {
+    const session = await auth()
+    if (!session?.user?.id) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+    }
+
+    if (!(await hasUserAiConsent())) {
+      return aiConsentForbiddenResponse()
+    }
+    const userId = session.user.id
+
+    const body = await request.json()
+    const { notebookId, theme, purpose, audience, slideCount, language } = body
+
+    if (!notebookId || typeof notebookId !== 'string') {
+      return NextResponse.json({ error: 'notebookId is required' }, { status: 400 })
+    }
+
+    const intent =
+      purpose || audience || slideCount
+        ? {
+            purpose: purpose || 'auto',
+            audience: audience || 'auto',
+            slideCount: typeof slideCount === 'number' ? slideCount : undefined,
+            template: 'auto' as const,
+          }
+        : null
+
+    const result = await withAiQuota(
+      userId,
+      'slide_generate',
+      () =>
+        generateSlideDeck({
+          userId,
+          sourceNotebookId: notebookId,
+          theme: theme && theme !== 'auto' ? theme : null,
+          lang: language === 'en' ? 'en' : 'fr',
+          intent,
+        }),
+      { lane: 'chat' },
+    )
+
+    if (!result.success) {
+      return NextResponse.json({ error: result.error || 'Failed to generate slides' }, { status: 500 })
+    }
+
+    return NextResponse.json(result)
+  } catch (error: unknown) {
+    const quotaResp = handleQuotaHttpError(error)
+    if (quotaResp) return quotaResp
+    console.error('[NotebookSlides] Error:', error)
+    const message = error instanceof Error ? error.message : 'Failed to generate slides'
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

memento-note/app/api/ai/notebook-summary/route.ts

@@ -2,7 +2,7 @@ import { rateLimit } from '@/lib/rate-limit'
 import { NextRequest, NextResponse } from 'next/server'
 import { auth } from '@/auth'
 import { notebookSummaryService } from '@/lib/ai/services'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenJson } from '@/lib/consent/server-consent'
 import { reserveUsageOrThrow, QuotaExceededError } from '@/lib/entitlements'
 
 /**
@@ -20,10 +20,7 @@ export async function POST(request: NextRequest) {
     }
 
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json(
-        { success: false, error: 'ai_consent_required' },
-        { status: 403 }
-      )
+      return aiConsentForbiddenJson()
     }
 
     const body = await request.json()

memento-note/app/api/ai/personas/route.ts

@@ -3,7 +3,7 @@ import { auth } from '@/auth'
 import { getSystemConfig } from '@/lib/config'
 import { getTagsProvider } from '@/lib/ai/factory'
 import { reserveUsageOrThrow, QuotaExceededError } from '@/lib/entitlements'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 
 export type PersonaId = 'engineer' | 'financial' | 'customer' | 'skeptic' | 'optimist'
 
@@ -70,7 +70,7 @@ export async function POST(request: NextRequest) {
     }
 
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json({ error: 'ai_consent_required' }, { status: 403 })
+      return aiConsentForbiddenResponse()
     }
 
     const { content, title, personaId } = await request.json()

memento-note/app/api/ai/reformulate/route.ts

@@ -3,7 +3,7 @@ import { auth } from '@/auth'
 import { paragraphRefactorService } from '@/lib/ai/services/paragraph-refactor.service'
 import { getAISettings } from '@/app/actions/ai-settings'
 import { reserveUsageOrThrow, QuotaExceededError } from '@/lib/entitlements'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 
 export async function POST(request: NextRequest) {
   try {
@@ -14,7 +14,7 @@ export async function POST(request: NextRequest) {
     }
 
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json({ error: 'ai_consent_required' }, { status: 403 })
+      return aiConsentForbiddenResponse()
     }
 
     // Respect user's paragraphRefactor toggle (Assistant IA)

memento-note/app/api/ai/suggest-charts/route.ts

@@ -5,7 +5,7 @@ import { getSystemConfig } from '@/lib/config'
 import { prisma } from '@/lib/prisma'
 import { auth } from '@/auth'
 import { reserveUsageOrThrow, QuotaExceededError, QuotaServiceUnavailableError } from '@/lib/entitlements'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 
 export const maxDuration = 30
 
@@ -41,10 +41,7 @@ export async function POST(req: Request) {
   }
 
   if (!(await hasUserAiConsent())) {
-    return new Response(JSON.stringify({ error: 'ai_consent_required' }), {
-      status: 403,
-      headers: { 'Content-Type': 'application/json' },
-    })
+    return aiConsentForbiddenResponse()
   }
   const userId = session.user.id
 

memento-note/app/api/ai/suggest-notebook/route.ts

@@ -1,7 +1,7 @@
 import { NextRequest, NextResponse } from 'next/server'
 import { auth } from '@/auth'
 import { notebookSuggestionService } from '@/lib/ai/services/notebook-suggestion.service'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 import { withAiQuota, handleQuotaHttpError } from '@/lib/ai-quota'
 
 export async function POST(req: NextRequest) {
@@ -13,7 +13,7 @@ export async function POST(req: NextRequest) {
     const userId = session.user.id
 
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json({ error: 'ai_consent_required' }, { status: 403 })
+      return aiConsentForbiddenResponse()
     }
 
     const body = await req.json()

memento-note/app/api/ai/tags/route.ts

@@ -6,7 +6,7 @@ import { runLaneWithBillingUser, willUseByokForLane } from '@/lib/ai/provider-fo
 import { getSystemConfig } from '@/lib/config';
 import { z } from 'zod';
 import { checkEntitlementOrThrow, QuotaExceededError, QuotaServiceUnavailableError } from '@/lib/entitlements';
-import { hasUserAiConsent } from '@/lib/consent/server-consent';
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent';
 
 import { getAISettings } from '@/app/actions/ai-settings';
 
@@ -25,7 +25,7 @@ export async function POST(req: NextRequest) {
 
     // GDPR AI Consent check
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json({ error: 'ai_consent_required' }, { status: 403 });
+      return aiConsentForbiddenResponse();
     }
 
     const userSettings = await getAISettings(session.user.id);

memento-note/app/api/ai/title-suggestions/route.ts

@@ -7,7 +7,7 @@ import { getAISettings } from '@/app/actions/ai-settings'
 import { reserveAiUsageOrThrow } from '@/lib/ai-quota'
 import { QuotaExceededError, QuotaServiceUnavailableError } from '@/lib/entitlements'
 import { z } from 'zod'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 
 const requestSchema = z.object({
   content: z.string().min(1, "Le contenu ne peut pas être vide"),
@@ -37,7 +37,7 @@ export async function POST(req: NextRequest) {
 
     // GDPR AI Consent check
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json({ error: 'ai_consent_required' }, { status: 403 })
+      return aiConsentForbiddenResponse()
     }
 
     const settings = await getAISettings(session.user.id)

memento-note/app/api/ai/transform-markdown/route.ts

@@ -2,7 +2,7 @@ import { NextRequest, NextResponse } from 'next/server'
 import { auth } from '@/auth'
 import { getChatProvider } from '@/lib/ai/factory'
 import { getSystemConfig } from '@/lib/config'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 import { withAiQuota, handleQuotaHttpError } from '@/lib/ai-quota'
 
 export async function POST(request: NextRequest) {
@@ -14,7 +14,7 @@ export async function POST(request: NextRequest) {
     }
 
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json({ error: 'ai_consent_required' }, { status: 403 })
+      return aiConsentForbiddenResponse()
     }
 
     const { text } = await request.json()

memento-note/app/api/ai/translate/route.ts

@@ -2,7 +2,7 @@ import { NextRequest, NextResponse } from 'next/server'
 import { auth } from '@/auth'
 import { getTagsProvider } from '@/lib/ai/factory'
 import { getSystemConfig } from '@/lib/config'
-import { hasUserAiConsent } from '@/lib/consent/server-consent'
+import { hasUserAiConsent, aiConsentForbiddenResponse } from '@/lib/consent/server-consent'
 import { reserveUsageOrThrow, QuotaExceededError } from '@/lib/entitlements'
 
 export async function POST(request: NextRequest) {
@@ -13,7 +13,7 @@ export async function POST(request: NextRequest) {
     }
 
     if (!(await hasUserAiConsent())) {
-      return NextResponse.json({ error: 'ai_consent_required' }, { status: 403 })
+      return aiConsentForbiddenResponse()
     }
 
     const { text, targetLanguage } = await request.json()