♿️(frontend) fix doc tree keyboard navigation regressions

Shift+Tab from sub-doc returns focus to root item

CHANGELOG.md

@@ -22,6 +22,7 @@ and this project adheres to
 
 - 🐛(backend) create a link_trace record for on-boarding documents
 - 🐛(backend) manage race condition when creating sandbox document
+- ♿️(frontend) improve doc tree keyboard navigation #1981
 
 ## [v4.7.0] - 2026-03-09
 

src/frontend/apps/e2e/__tests__/app-impress/doc-tree.spec.ts

@@ -271,6 +271,40 @@ test.describe('Doc Tree', () => {
     await expect(rootMoreOptionsButton).toBeFocused();
   });
 
+  test('Shift+Tab from resize handle returns focus to selected sub-doc', async ({
+    page,
+    browserName,
+  }) => {
+    const [docParent] = await createDoc(
+      page,
+      'doc-tree-shift-tab',
+      browserName,
+      1,
+    );
+    await verifyDocName(page, docParent);
+
+    const { name: docChild } = await createRootSubPage(
+      page,
+      browserName,
+      'doc-tree-shift-tab-child',
+    );
+
+    const selectedSubDoc = await getTreeRow(page, docChild);
+    await expect(selectedSubDoc).toHaveAttribute('aria-selected', 'true');
+
+    const resizeHandle = page.locator('[data-panel-resize-handle-id]').first();
+    await expect(resizeHandle).toBeVisible();
+
+    await selectedSubDoc.focus();
+    await expect(selectedSubDoc).toBeFocused();
+
+    await page.keyboard.press('Tab');
+    await expect(resizeHandle).toBeFocused();
+
+    await page.keyboard.press('Shift+Tab');
+    await expect(selectedSubDoc).toBeFocused();
+  });
+
   test('it updates the child icon from the tree', async ({
     page,
     browserName,

src/frontend/apps/impress/src/features/docs/doc-header/components/DocTitle.tsx

@@ -159,7 +159,7 @@ const DocTitleInput = ({ doc }: DocTitleProps) => {
 
   return (
     <Box
-      className="--docs--doc-title"
+      className={CLASS_DOC_TITLE}
       $direction="row"
       $align="center"
       $gap="4px"

src/frontend/apps/impress/src/features/docs/doc-tree/components/DocSubPageItem.tsx

@@ -186,6 +186,7 @@ export const DocSubPageItem = (props: TreeViewNodeProps<Doc>) => {
           docId={doc.id}
           title={doc.title}
           buttonProps={{
+            tabIndex: -1,
             $css: css`
               &:focus-visible {
                 outline: 2px solid var(--c--globals--colors--brand-500);
@@ -220,6 +221,7 @@ export const DocSubPageItem = (props: TreeViewNodeProps<Doc>) => {
             e.stopPropagation();
             handleActivate();
           }}
+          tabIndex={-1}
           $width="100%"
           $direction="row"
           $gap={spacingsTokens['xs']}

src/frontend/apps/impress/src/features/docs/doc-tree/components/DocTree.tsx

@@ -19,6 +19,7 @@ import {
   useTrans,
 } from '@/docs/doc-management';
 
+import { CLASS_DOC_TITLE } from '../../doc-header';
 import { KEY_DOC_TREE, useDocTree } from '../api/useDocTree';
 import { findIndexInTree } from '../utils';
 
@@ -120,11 +121,21 @@ export const DocTree = ({ currentDoc }: DocTreeProps) => {
 
       if (e.key === 'Enter' || e.key === ' ') {
         e.preventDefault();
-        selectRoot();
-        navigateToRoot();
+        if (currentDoc.id === treeContext?.root?.id) {
+          document.querySelector<HTMLElement>(`.${CLASS_DOC_TITLE}`)?.focus();
+        } else {
+          selectRoot();
+          navigateToRoot();
+        }
       }
     },
-    [selectRoot, navigateToRoot, rootActionsOpen],
+    [
+      selectRoot,
+      navigateToRoot,
+      rootActionsOpen,
+      currentDoc.id,
+      treeContext?.root?.id,
+    ],
   );
 
   // Handle menu open/close for root item - mirrors DocSubPageItem behavior
@@ -142,6 +153,13 @@ export const DocTree = ({ currentDoc }: DocTreeProps) => {
   }, []);
 
   const handleRowKeyDown = useCallback((e: React.KeyboardEvent) => {
+    if (e.key === 'Tab' && e.shiftKey) {
+      e.preventDefault();
+      e.stopPropagation();
+      rootItemRef.current?.focus();
+      return;
+    }
+
     if (e.key !== 'Enter') {
       return;
     }
@@ -157,6 +175,13 @@ export const DocTree = ({ currentDoc }: DocTreeProps) => {
       return;
     }
 
+    const treeItem = e.currentTarget.querySelector('[role="treeitem"]');
+    if (treeItem?.getAttribute('aria-selected') === 'true') {
+      e.preventDefault();
+      document.querySelector<HTMLElement>(`.${CLASS_DOC_TITLE}`)?.focus();
+      return;
+    }
+
     e.currentTarget
       .querySelector<HTMLDivElement>('.c__tree-view--node')
       ?.click();