feat: redirect to AI consent settings when consent is missing

- requestAiConsent now redirects to /settings/general?highlight=aiConsent
  instead of opening the modal when called outside the settings page
- Settings page highlights the consent section and scrolls to it
- Adds consent.ai.settingsBanner i18n key (fr/en)
- Keeps inline modal on /settings/general so the grant button still works

memento-note/app/(main)/settings/general/general-settings-client.tsx

@@ -1,11 +1,11 @@
 'use client'
 
-import { useState } from 'react'
+import { useState, useEffect, useRef } from 'react'
 import Link from 'next/link'
 import { useLanguage } from '@/lib/i18n'
 import { updateAISettings } from '@/app/actions/ai-settings'
 import { toast } from 'sonner'
-import { useRouter } from 'next/navigation'
+import { useRouter, useSearchParams } from 'next/navigation'
 import { Globe, Bell, Shield, Brain, HelpCircle } from 'lucide-react'
 import { motion } from 'motion/react'
 import { openCookiePreferences } from '@/lib/consent/cookie-consent'
@@ -27,6 +27,20 @@ export function GeneralSettingsClient({ initialSettings }: GeneralSettingsClient
   const { t, setLanguage: setContextLanguage } = useLanguage()
   const { hasAiConsent, revokeConsent, requestAiConsent } = useAiConsent()
   const router = useRouter()
+  const searchParams = useSearchParams()
+  const aiConsentSectionRef = useRef<HTMLDivElement>(null)
+  const highlightAiConsent = searchParams?.get('highlight') === 'aiConsent'
+  const [showConsentHighlight, setShowConsentHighlight] = useState(highlightAiConsent)
+
+  useEffect(() => {
+    if (highlightAiConsent && aiConsentSectionRef.current) {
+      setShowConsentHighlight(true)
+      aiConsentSectionRef.current.scrollIntoView({ behavior: 'smooth', block: 'center' })
+      const timer = setTimeout(() => setShowConsentHighlight(false), 4000)
+      return () => clearTimeout(timer)
+    }
+  }, [highlightAiConsent])
+
   const [language, setLanguage] = useState(initialSettings.preferredLanguage || 'auto')
   const [emailNotifications, setEmailNotifications] = useState(initialSettings.emailNotifications ?? false)
   const [desktopNotifications, setDesktopNotifications] = useState(initialSettings.desktopNotifications ?? false)
@@ -76,6 +90,12 @@ export function GeneralSettingsClient({ initialSettings }: GeneralSettingsClient
         {t('generalSettings.description')}
       </h3>
 
+      {highlightAiConsent && (
+        <div className="rounded-xl border border-brand-accent/30 bg-brand-accent/10 p-4 text-sm font-medium text-ink">
+          {t('consent.ai.settingsBanner')}
+        </div>
+      )}
+
       <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
         <div className="bg-white/40 dark:bg-white/5 border border-border rounded-xl p-8 space-y-6">
           <div className="flex items-center gap-5">
@@ -202,7 +222,15 @@ export function GeneralSettingsClient({ initialSettings }: GeneralSettingsClient
           </div>
         </div>
 
-        <div className="bg-white/40 dark:bg-white/5 border border-border rounded-xl p-8 space-y-6 md:col-span-2">
+        <div
+          ref={aiConsentSectionRef}
+          className={cn(
+            'bg-white/40 dark:bg-white/5 border rounded-xl p-8 space-y-6 md:col-span-2 transition-all duration-500',
+            showConsentHighlight
+              ? 'border-brand-accent ring-2 ring-brand-accent/40 shadow-lg shadow-brand-accent/10'
+              : 'border-border'
+          )}
+        >
           <div className="flex items-start justify-between gap-4">
             <div className="flex items-center gap-5">
               <div className="p-3 bg-paper dark:bg-white/10 rounded-2xl text-concrete border border-border">