fix: fixup leads

control-plane/api/internal/leads/handler.go

@@ -30,10 +30,16 @@ func (h *Handler) Create(c *gin.Context) {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "requête invalide"})
 		return
 	}
-	l, err := h.store.Create(Lead{
+
+	lead := Lead{
 		Telegram: sanitize(req.Telegram),
-		Message:  sanitize(req.Message),
-	})
+	}
+
+	if msg := sanitize(req.Message); msg != "" {
+		lead.Message = &msg
+	}
+
+	l, err := h.store.Create(lead)
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "erreur serveur"})
 		return