tested real proxmox connection

--> passed

backend/internal/audit/handler.go

@@ -125,6 +125,9 @@ func (h Handler) ListTenantAudit(w http.ResponseWriter, r *http.Request) {
 		writeError(w, http.StatusInternalServerError, "audit_list_failed")
 		return
 	}
+	if entries == nil {
+		entries = []Entry{}
+	}
 
 	writeJSON(w, http.StatusOK, map[string]any{
 		"data":   entries,
@@ -141,4 +144,4 @@ func writeJSON(w http.ResponseWriter, status int, body any) {
 
 func writeError(w http.ResponseWriter, status int, message string) {
 	writeJSON(w, status, map[string]string{"error": message})
-}
+}