🐛(frontend) show full nested doc names with horizontal scroll support

.gitignore

@@ -75,3 +75,6 @@ db.sqlite3
 .vscode/
 *.iml
 .devcontainer
+
+# Cursor rules
+.cursorrules

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to
 ## Fixed
 
 - 🐛(frontend) fix duplicate document entries in grid #1479
+- 🐛(frontend) show full nested doc names with ajustable bar #1456
 
 ## [3.8.2] - 2025-10-17
 
@@ -30,14 +31,17 @@ and this project adheres to
 
 - 🔥(backend) remove treebeard form for the document admin #1470
 
-
 ## [3.8.0] - 2025-10-14
 
 ### Added
 
 - ✨(frontend) add pdf block to the editor #1293
 - ✨List and restore deleted docs #1450
 
+### Fixed
+
+- 🐛(frontend) show full nested doc names with ajustable bar #1456
+
 ### Changed
 
 - ♻️(frontend) Refactor Auth component for improved redirection logic #1461

src/frontend/apps/e2e/__tests__/app-impress/left-panel.spec.ts

@@ -1,5 +1,7 @@
 import { expect, test } from '@playwright/test';
 
+import { createDoc } from './utils-common';
+
 test.describe('Left panel desktop', () => {
   test.beforeEach(async ({ page }) => {
     await page.goto('/');
@@ -11,6 +13,53 @@ test.describe('Left panel desktop', () => {
     await expect(page.getByTestId('home-button')).toBeVisible();
     await expect(page.getByTestId('new-doc-button')).toBeVisible();
   });
+
+  test('checks resize handle is present and functional on document page', async ({
+    page,
+    browserName,
+  }) => {
+    // On home page, resize handle should NOT be present
+    let resizeHandle = page.locator('[data-panel-resize-handle-id]');
+    await expect(resizeHandle).toBeHidden();
+
+    // Create and navigate to a document
+    await createDoc(page, 'doc-resize-test', browserName, 1);
+
+    // Now resize handle should be visible on document page
+    resizeHandle = page.locator('[data-panel-resize-handle-id]').first();
+    await expect(resizeHandle).toBeVisible();
+
+    const leftPanel = page.getByTestId('left-panel-desktop');
+    await expect(leftPanel).toBeVisible();
+
+    // Get initial panel width
+    const initialBox = await leftPanel.boundingBox();
+    expect(initialBox).not.toBeNull();
+
+    // Get handle position
+    const handleBox = await resizeHandle.boundingBox();
+    expect(handleBox).not.toBeNull();
+
+    // Test resize by dragging the handle
+    await page.mouse.move(
+      handleBox!.x + handleBox!.width / 2,
+      handleBox!.y + handleBox!.height / 2,
+    );
+    await page.mouse.down();
+    await page.mouse.move(
+      handleBox!.x + 100,
+      handleBox!.y + handleBox!.height / 2,
+    );
+    await page.mouse.up();
+
+    // Wait for resize to complete
+    await page.waitForTimeout(200);
+
+    // Verify the panel has been resized
+    const newBox = await leftPanel.boundingBox();
+    expect(newBox).not.toBeNull();
+    expect(newBox!.width).toBeGreaterThan(initialBox!.width);
+  });
 });
 
 test.describe('Left panel mobile', () => {
@@ -47,4 +96,12 @@ test.describe('Left panel mobile', () => {
     await expect(languageButton).toBeInViewport();
     await expect(logoutButton).toBeInViewport();
   });
+
+  test('checks resize handle is not present on mobile', async ({ page }) => {
+    await page.goto('/');
+
+    // Verify the resize handle is NOT present on mobile
+    const resizeHandle = page.locator('[data-panel-resize-handle-id]');
+    await expect(resizeHandle).toBeHidden();
+  });
 });

src/frontend/apps/impress/package.json

@@ -60,6 +60,7 @@
     "react-dom": "*",
     "react-i18next": "15.7.3",
     "react-intersection-observer": "9.16.0",
+    "react-resizable-panels": "3.0.6",
     "react-select": "5.10.2",
     "styled-components": "6.1.19",
     "use-debounce": "10.0.6",

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

@@ -163,6 +163,7 @@ export const DocSubPageItem = (props: TreeViewNodeProps<Doc>) => {
           aria-label={`${t('Open document {{title}}', { title: docTitle })}`}
           $css={css`
             text-align: left;
+            min-width: 0;
           `}
         >
           <Box $width="16px" $height="16px">
@@ -180,8 +181,10 @@ export const DocSubPageItem = (props: TreeViewNodeProps<Doc>) => {
               display: flex;
               flex-direction: row;
               width: 100%;
+              min-width: 0;
               gap: 0.5rem;
               align-items: center;
+              overflow: hidden;
             `}
           >
             <Text $css={ItemTextCss} $size="sm" $variation="1000">

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

               } 
             &:focus-within { 
               .doc-tree-root-item-actions { 
                 opacity: 1; 
               } 
@@ -184,7 +184,6 @@ export const DocTree = ({ currentDoc }: DocTreeProps) => {
         /* Remove outline from TreeViewItem wrapper elements */
         .c__tree-view--row {
           outline: none !important;
-
           &:focus-visible {
             outline: none !important;
           }
@@ -241,7 +240,7 @@ export const DocTree = ({ currentDoc }: DocTreeProps) => {
               }
             }
             &:hover,
-            &:focus-within {
+            &:focus-visible {
               .doc-tree-root-item-actions {
                 opacity: 1;
               }

src/frontend/apps/impress/src/features/left-panel/components/LeftPanel.tsx

@@ -39,12 +39,10 @@ export const LeftPanel = () => {
       {isDesktop && (
         <Box
           data-testid="left-panel-desktop"
-          $css={`
+          $css={css`
             height: calc(100vh - ${HEADER_HEIGHT}px);
-            width: 300px;
-            min-width: 300px;
+            width: 100%;
             overflow: hidden;
-            border-right: 1px solid ${colorsTokens['greyscale-200']};
             background-color: ${colorsTokens['greyscale-000']};
           `}
           className="--docs--left-panel-desktop"

src/frontend/apps/impress/src/features/left-panel/components/ResizableLeftPanel.tsx

@@ -0,0 +1,110 @@
+import { useEffect, useRef, useState } from 'react';
+import {
+  ImperativePanelHandle,
+  Panel,
+  PanelGroup,
+  PanelResizeHandle,
+} from 'react-resizable-panels';
+import { createGlobalStyle } from 'styled-components';
+
+import { useCunninghamTheme } from '@/cunningham';
+
+interface PanelStyleProps {
+  $isResizing: boolean;
+}
+
+const PanelStyle = createGlobalStyle<PanelStyleProps>`
+  ${({ $isResizing }) => $isResizing && `body * { transition: none !important; }`}
+`;
+
+// Convert a target pixel width to a percentage of the current viewport width.
+// react-resizable-panels expects sizes in %, not px.
+const calculateDefaultSize = (targetWidth: number) => {
+  const windowWidth = window.innerWidth;
+  return (targetWidth / windowWidth) * 100;
+};
+
+type ResizableLeftPanelProps = {
+  leftPanel: React.ReactNode;
+  children: React.ReactNode;
+  minPanelSizePx?: number;
+  maxPanelSizePx?: number;
+};
+
+export const ResizableLeftPanel = ({
+  leftPanel,
+  children,
+  minPanelSizePx = 300,
+  maxPanelSizePx = 450,
+}: ResizableLeftPanelProps) => {
+  const [isResizing, setIsResizing] = useState(false);
+  const { colorsTokens } = useCunninghamTheme();
+  const ref = useRef<ImperativePanelHandle>(null);
+  const resizeTimeoutRef = useRef<number | undefined>(undefined);
+
+  const [minPanelSize, setMinPanelSize] = useState(0);
+  const [maxPanelSize, setMaxPanelSize] = useState(0);
+
+  // Single resize listener that handles both panel size updates and transition disabling
+  useEffect(() => {
+    const handleResize = () => {
+      // Update panel sizes (px -> %)
+      const min = Math.round(calculateDefaultSize(minPanelSizePx));
+      const max = Math.round(
+        Math.min(calculateDefaultSize(maxPanelSizePx), 40),
+      );
+      setMinPanelSize(min);
+      setMaxPanelSize(max);
+
+      // Temporarily disable transitions to avoid flicker
+      setIsResizing(true);
+      if (resizeTimeoutRef.current) {
+        clearTimeout(resizeTimeoutRef.current);
+      }
+      resizeTimeoutRef.current = window.setTimeout(() => {
+        setIsResizing(false);
+      }, 150);
+    };
+
+    handleResize();
+
+    window.addEventListener('resize', handleResize);
+
+    return () => {
+      window.removeEventListener('resize', handleResize);
+      if (resizeTimeoutRef.current) {
+        clearTimeout(resizeTimeoutRef.current);
+      }
+    };
+  }, [minPanelSizePx, maxPanelSizePx]);
+
+  return (
+    <>
+      <PanelStyle $isResizing={isResizing} />
+      <PanelGroup
+        autoSaveId="docs-left-panel-persistence"
+        direction="horizontal"
+      >
+        <Panel
+          ref={ref}
+          order={0}
+          defaultSize={minPanelSize}
+          minSize={minPanelSize}
+          maxSize={maxPanelSize}
+        >
+          {leftPanel}
+        </Panel>
+        <PanelResizeHandle
+          style={{
+            borderRightWidth: '1px',
+            borderRightStyle: 'solid',
+            borderRightColor: colorsTokens['greyscale-200'],
+            width: '1px',
+            cursor: 'col-resize',
+          }}
+        />
+        <Panel order={1}>{children}</Panel>
+      </PanelGroup>
+    </>
+  );
+};

src/frontend/apps/impress/src/features/left-panel/components/index.tsx

@@ -1 +1,2 @@
 export * from './LeftPanel';
+export * from './ResizableLeftPanel';