[ci skip] more codex 5.3 improvements

server/handler/updateCleanup.go

@@ -16,6 +16,10 @@ import (
 // @Failure 500 {string} string "Server error"
 // @Router /api/cleanup/updates [delete]
 func (h *Handler) UpdateCleanup(w http.ResponseWriter, r *http.Request) {
+	if h.denyLegacyAPI(w, "/api/cleanup/updates") {
+		return
+	}
+
 	/*
 		// Get the current time
 		now := time.Now()