Amélioration de la tax report

frontend/src/components/Cerfa2778Preview.jsx

@@ -385,7 +385,7 @@ export default function Cerfa2778Preview({ annee, activeView }) {
                 </div>
 
                 {/* Détail des plateformes incluses */}
-                {moisData.detail.length > 1 && (
+                {moisData.detail.length > 0 && (
                   <div style={{ marginBottom: 14, padding: '10px 12px', background: 'var(--surface-2)', borderRadius: 8 }}>
                     <div style={{ fontSize: 'var(--fs-xs)', color: 'var(--text-muted)', marginBottom: 6, fontWeight: 500, textTransform: 'uppercase', letterSpacing: '.05em' }}>
                       Plateformes incluses