fix: Add empty state message for music step when Jamendo not configured

client/src/pages/new-reel.tsx

@@ -486,6 +486,25 @@ export default function NewReel() {
                                         ) : (
                                             <>
                                                 <div className="space-y-2">
+                                                    {(!musicData?.tracks || musicData.tracks.length === 0) && (
+                                                        <div className="text-center py-8 border-2 border-dashed border-border rounded-lg">
+                                                            <Music className="w-12 h-12 mx-auto text-muted-foreground mb-4" />
+                                                            <p className="text-muted-foreground mb-2">
+                                                                Aucune musique disponible
+                                                            </p>
+                                                            <p className="text-xs text-muted-foreground mb-4">
+                                                                Configurez un Client ID Jamendo dans les Paramètres
+                                                            </p>
+                                                            <a
+                                                                href="https://developer.jamendo.com/v3.0"
+                                                                target="_blank"
+                                                                rel="noopener noreferrer"
+                                                                className="text-sm text-primary hover:underline"
+                                                            >
+                                                                Obtenir un Client ID Jamendo →
+                                                            </a>
+                                                        </div>
+                                                    )}
                                                     {musicData?.tracks?.map((track) => (
                                                         <div
                                                             key={track.id}