diff --git a/frontend/js/config.js b/frontend/js/config.js
index 56758e6..bc2f1c7 100644
--- a/frontend/js/config.js
+++ b/frontend/js/config.js
@@ -2,7 +2,7 @@
 import { api } from './auth.js';
 import { state } from './state.js';
 import { el, icon, openFile } from './viewer.js';
-import { syncVaultSelectors, setSelectedVaultContext, refreshSidebarForContext, loadVaults, loadTags } from './sidebar.js';
+import { syncVaultSelectors, setSelectedVaultContext, refreshSidebarForContext, loadVaults, loadTags, TagFilterService } from './sidebar.js';
 import {  escapeHtml, safeCreateIcons } from './utils.js';
 import { showToast, closeHeaderMenu, closeMobileSidebar } from './ui.js';
 
diff --git a/frontend/js/search.js b/frontend/js/search.js
index 1c2b6e2..3cde12e 100644
--- a/frontend/js/search.js
+++ b/frontend/js/search.js
@@ -5,7 +5,7 @@ import { safeCreateIcons } from './utils.js';
 import { showLoading, el, hideProgressBar, showWelcome, highlightSearchText } from './viewer.js';
 import { _getEffective } from './config.js';
 import { TabManager, showToast } from './ui.js';
-import { addTagFilter, buildSearchResultsHeader, shouldDisplayPath, removeTagFilter } from './sidebar.js';
+import { addTagFilter, buildSearchResultsHeader, shouldDisplayPath, removeTagFilter, TagFilterService } from './sidebar.js';
 // ---------------------------------------------------------------------------
 // Search History Service (localStorage, LIFO, max 50, dedup)
 // ---------------------------------------------------------------------------
diff --git a/frontend/js/viewer.js b/frontend/js/viewer.js
index 1eec9b1..8c7c613 100644
--- a/frontend/js/viewer.js
+++ b/frontend/js/viewer.js
@@ -3,7 +3,7 @@ import { api } from './auth.js';
 import { state } from './state.js';
 import { escapeHtml, safeCreateIcons, safeHighlight, getFileIcon } from './utils.js';
 import { TabManager, closeMobileSidebar, ContextMenuManager, RightSidebarManager, showToast } from './ui.js';
-import { syncActiveFileTreeItem, searchByTag } from './sidebar.js';
+import { syncActiveFileTreeItem, searchByTag, TagFilterService } from './sidebar.js';
 import { AutocompleteDropdown } from './search.js';
 import { initDashboardTabs } from './sync.js';
 import { DashboardStatsWidget, DashboardRecentWidget, DashboardBookmarkWidget, DashboardSharedWidget, DashboardConflictsWidget } from './dashboard.js';