fix(ui): thème des réglages et derniers textes de la revue

Les boutons des pages Agents, MCP, Données, Intégrations et Généraux suivent la couleur choisie. Les libellés encore techniques (recherche par le sens, notes proches, connexion unique) sont en langage courant.

Co-authored-by: Cursor <cursoragent@cursor.com>

memento-note/components/agents/agent-templates.tsx

@@ -176,7 +176,7 @@ export function AgentTemplates({ onInstalled, existingAgentNames }: AgentTemplat
             }}
             className={`px-3 py-1.5 rounded-full text-xs font-semibold transition-all border ${
               activeCategory === cat.id
-                ? 'bg-ink text-paper border-ink'
+                ? 'bg-brand-accent text-white border-brand-accent'
                 : 'bg-paper text-muted-ink border-border/40 hover:border-ink/30'
             }`}
           >

memento-note/components/mcp/mcp-settings-panel.tsx

@@ -197,7 +197,7 @@ export function McpSettingsPanel({
           ) : (
           <Dialog open={createOpen} onOpenChange={setCreateOpen}>
             <DialogTrigger asChild>
-              <button className="flex items-center gap-1.5 px-4 py-2 rounded-xl bg-ink text-paper text-sm font-medium hover:opacity-90 active:scale-[0.98] transition-all">
+              <button className="flex items-center gap-1.5 px-4 py-2 rounded-xl bg-brand-accent text-white text-sm font-medium hover:opacity-90 active:scale-[0.98] transition-all">
                 <Plus className="h-3.5 w-3.5" />
                 {t('mcpSettings.apiKeys.generate')}
               </button>
@@ -260,7 +260,7 @@ export function McpSettingsPanel({
           <DialogFooter>
             <button
               onClick={() => setShowRawKey(null)}
-              className="px-6 py-2.5 rounded-xl bg-ink text-paper text-sm font-medium"
+              className="px-6 py-2.5 rounded-xl bg-brand-accent text-white text-sm font-medium"
             >
               {t('mcpSettings.createDialog.done')}
             </button>
@@ -297,7 +297,7 @@ function CreateKeyDialog({ onGenerate, isPending }: { onGenerate: (name: string)
         <button
           onClick={() => onGenerate(name)}
           disabled={isPending}
-          className="px-6 py-2.5 rounded-xl bg-ink text-paper text-sm font-medium disabled:opacity-60"
+          className="px-6 py-2.5 rounded-xl bg-brand-accent text-white text-sm font-medium disabled:opacity-60"
         >
           <div className="flex items-center gap-2">
             {isPending ? <Loader2 className="h-4 w-4 animate-spin" /> : <Key className="h-4 w-4" />}

memento-note/components/settings/SettingsNav.tsx

@@ -43,7 +43,7 @@ export function SettingsNav({ className }: SettingsNavProps) {
           {isActive(tab.href) && (
             <motion.div
               layoutId="activeSettingsTabLine"
-              className="absolute bottom-0 left-0 right-0 h-0.5 bg-ink"
+              className="absolute bottom-0 left-0 right-0 h-0.5 bg-brand-accent"
               transition={{ type: 'spring', bounce: 0.1, duration: 0.8 }}
             />
           )}

memento-note/components/settings/billing-plans.tsx

@@ -361,7 +361,7 @@ export function BillingPlans() {
       name: t('billing.enterpriseTitle') || 'Enterprise',
       price: t('billing.contactSales') || 'Sur devis',
       period: '',
-      description: t('billing.enterpriseDescription') || 'Crédits illimités ou pool dédié, SSO, support prioritaire.',
+      description: t('billing.enterpriseDescription') || 'Crédits illimités ou pool dédié, connexion unique pour l’équipe, support prioritaire.',
       features: [
         t('billing.enterpriseFeature1'),
         t('billing.enterpriseFeature2'),