diff --git a/internal/web/ui.go b/internal/web/ui.go
index 5c8049f..f2f96dd 100644
--- a/internal/web/ui.go
+++ b/internal/web/ui.go
@@ -1418,6 +1418,7 @@ func (u *UI) actionModelSync(w http.ResponseWriter, r *http.Request) {
 }
 
 func (u *UI) pageDiagnostics(w http.ResponseWriter, r *http.Request) {
+	u.ensureDevicesLoaded()
 	data := PageData{Title: "日志审计", Devices: u.registry.GetDevices()}
 	if u.auditRepo != nil {
 		items, err := u.auditRepo.List()