diff --git a/frontend/js/config.js b/frontend/js/config.js
index dd462e5..781613c 100644
--- a/frontend/js/config.js
+++ b/frontend/js/config.js
@@ -1,6 +1,10 @@
 // config.js — extracted from app.js (3872-4865)
 import { selectedContextVault, allVaults, activeSidebarTab, sidebarFilterCaseSensitive } from './state.js';
 
+let _recentTimestampTimer = null;
+let _recentFilesCache = [];
+let _recentRefreshTimer = null;
+
 async function loadRecentFiles(vaultFilter) {
   const listEl = document.getElementById("recent-list");
   const emptyEl = document.getElementById("recent-empty");