fix(ui): thème, textes et lisibilité restants de la revue

Les boutons suivent la couleur d’apparence, les libellés trop petits ou trop techniques sont clarifiés, et le catalogue des fournisseurs se met à jour tout seul.

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

memento-note/components/settings/settings-help-box.tsx

@@ -28,7 +28,7 @@ export function SettingsHelpBox({ title, steps, defaultOpen = false, className }
         className="w-full flex items-center gap-2 px-4 py-3 text-left hover:bg-border/10 transition-colors"
       >
         <HelpCircle size={14} className="text-brand-accent shrink-0" />
-        <span className="text-[12px] font-semibold text-ink flex-1">{title}</span>
+        <span className="text-sm font-semibold text-ink flex-1">{title}</span>
         {open ? (
           <ChevronUp size={13} className="text-concrete shrink-0" />
         ) : (
@@ -40,10 +40,10 @@ export function SettingsHelpBox({ title, steps, defaultOpen = false, className }
         <ol className="px-4 pb-4 space-y-2.5 border-t border-border/30 pt-3">
           {steps.map((step, i) => (
             <li key={i} className="flex items-start gap-2.5">
-              <span className="w-5 h-5 rounded-full bg-brand-accent/10 text-brand-accent text-[10px] font-bold flex items-center justify-center shrink-0 mt-0.5">
+              <span className="w-5 h-5 rounded-full bg-brand-accent/10 text-brand-accent text-xs font-semibold flex items-center justify-center shrink-0 mt-0.5">
                 {step.icon ?? i + 1}
               </span>
-              <span className="text-[12px] text-concrete leading-relaxed">
+              <span className="text-sm text-concrete leading-relaxed">
                 {step.text}
                 {step.link && (
                   <>