fix: export refreshSidebarTreePreservingState, loadRecentFiles; add imports sync.js, config.js

frontend/js/config.js

@@ -1,6 +1,7 @@
 // config.js — extracted from app.js (3872-4865)
 import { api } from './auth.js';
 import { state } from './state.js';
+import { el, icon } from './viewer.js';
 import { syncVaultSelectors, setSelectedVaultContext, refreshSidebarForContext, loadVaults, loadTags } from './sidebar.js';
 import {  escapeHtml, safeCreateIcons } from './utils.js';
 
@@ -8,7 +9,7 @@ let _recentTimestampTimer = null;
 let _recentFilesCache = [];
 let _recentRefreshTimer = null;
 
-async function loadRecentFiles(vaultFilter) {
+export async function loadRecentFiles(vaultFilter) {
   const listEl = document.getElementById("recent-list");
   const emptyEl = document.getElementById("recent-empty");
   if (!listEl) return;

frontend/js/sidebar.js

@@ -378,7 +378,7 @@ async function incrementalLoadDirectory(vaultName, dirPath, container) {
   container.appendChild(fragment);
 }
 
-async function refreshSidebarTreePreservingState() {
+export async function refreshSidebarTreePreservingState() {
   // 1. Capture expanded states
   const expandedVaults = Array.from(document.querySelectorAll(".vault-item"))
     .filter((v) => {

frontend/js/sync.js

@@ -1,7 +1,8 @@
 /* ObsiGate — Sync: SSE client + PWA registration */
 import { state } from './state.js';
 import { showToast } from './ui.js';
-import { loadVaults, loadTags, refreshTagsForContext } from './sidebar.js';
+import { loadVaults, loadTags, refreshTagsForContext } from './sidebar.js';, refreshSidebarTreePreservingState
+import { loadRecentFiles } from './config.js';
 
 // ---------------------------------------------------------------------------
 // SSE Client — IndexUpdateManager