fix(files): allow collapsing active folder tree branches

src/components/layout/folder-tree.test.tsx

@@ -0,0 +1,96 @@
+import { DirType } from '@shared/constants'
+import type { StorageObject } from '@shared/types'
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
+import { cleanup, fireEvent, render, waitFor } from '@testing-library/react'
+import type { ReactNode } from 'react'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { listObjectsByPath } from '@/lib/api'
+import { FolderTree } from './folder-tree'
+
+const mocks = vi.hoisted(() => ({
+  currentPath: 'parent/child',
+}))
+
+vi.mock('@tanstack/react-router', () => ({
+  Link: ({ children, to, ...props }: { children: ReactNode; to: string }) => (
+    <a href={to} {...props}>
+      {children}
+    </a>
+  ),
+  useSearch: () => ({ path: mocks.currentPath }),
+}))
+
+vi.mock('@/lib/api', () => ({
+  listObjectsByPath: vi.fn(),
+}))
+
+function folder(id: string, name: string, parent = ''): StorageObject {
+  return {
+    id,
+    orgId: 'org-1',
+    alias: '',
+    name,
+    type: 'folder',
+    size: 0,
+    dirtype: DirType.USER_FOLDER,
+    parent,
+    object: '',
+    storageId: 'storage-1',
+    status: 'active',
+    trashedAt: null,
+    createdAt: '2026-01-01T00:00:00.000Z',
+    updatedAt: '2026-01-01T00:00:00.000Z',
+  }
+}
+
+function page(items: StorageObject[]) {
+  return {
+    items,
+    total: items.length,
+    page: 1,
+    pageSize: 100,
+  }
+}
+
+function renderFolderTree() {
+  const queryClient = new QueryClient({
+    defaultOptions: {
+      queries: { retry: false },
+    },
+  })
+
+  return render(
+    <QueryClientProvider client={queryClient}>
+      <FolderTree />
+    </QueryClientProvider>,
+  )
+}
+
+beforeEach(() => {
+  mocks.currentPath = 'parent/child'
+  vi.mocked(listObjectsByPath).mockImplementation(async (path) => {
+    if (path === '') return page([folder('parent', 'parent')])
+    if (path === 'parent') return page([folder('child', 'child', 'parent')])
+    return page([])
+  })
+})
+
+afterEach(() => {
+  cleanup()
+  vi.clearAllMocks()
+})
+
+describe('FolderTree', () => {
+  it('allows the current path ancestor to be collapsed manually', async () => {
+    const view = renderFolderTree()
+    await view.findByText('child')
+    const trigger = await view.findByRole('button', { name: 'parent' })
+
+    expect(trigger.getAttribute('aria-expanded')).toBe('true')
+
+    fireEvent.click(trigger)
+
+    await waitFor(() => expect(trigger.getAttribute('aria-expanded')).toBe('false'))
+    expect(view.queryByText('child')).toBeNull()
+  })
+})

src/components/layout/folder-tree.tsx

@@ -3,7 +3,7 @@ import type { StorageObject } from '@shared/types'
 import { useQuery } from '@tanstack/react-query'
 import { Link, useSearch } from '@tanstack/react-router'
 import { ChevronRight, Folder } from 'lucide-react'
-import { useState } from 'react'
+import { useEffect, useState } from 'react'
 import { Collapsible, CollapsibleContent, CollapsibleTrigger } from '@/components/ui/collapsible'
 import { SidebarMenuSub, SidebarMenuSubButton, SidebarMenuSubItem } from '@/components/ui/sidebar'
 import { listObjectsByPath } from '@/lib/api'
@@ -35,7 +35,10 @@ function FolderNode({
   const isActive = currentPath === folderPath
 
   const [open, setOpen] = useState(shouldAutoExpand)
-  const expanded = open || shouldAutoExpand
+  useEffect(() => {
+    if (isAncestorOf(folderPath, currentPath)) setOpen(true)
+  }, [folderPath, currentPath])
+
   // Always prefetch to know if this folder has children (for arrow visibility)
   const query = useFolders(folderPath, true)
   const subFolders = query.data ?? []
@@ -43,17 +46,27 @@ function FolderNode({
 
   return (
     <SidebarMenuSubItem>
-      <Collapsible open={expanded} onOpenChange={setOpen}>
+      <Collapsible open={open} onOpenChange={setOpen}>
         <SidebarMenuSubButton asChild isActive={isActive}>
-          <Link to="/files" search={{ path: folderPath }}>
-            <CollapsibleTrigger asChild onClick={(e) => e.preventDefault()} disabled={!hasChildren}>
-              <ChevronRight
-                className={`h-3 w-3 shrink-0 transition-transform data-[state=open]:rotate-90 ${hasChildren ? '' : 'invisible'}`}
-              />
-            </CollapsibleTrigger>
-            <Folder className="h-4 w-4" />
-            <span>{folder.name}</span>
-          </Link>
+          <div>
+            {hasChildren ? (
+              <CollapsibleTrigger asChild>
+                <button
+                  type="button"
+                  aria-label={folder.name}
+                  className="group/trigger flex size-4 shrink-0 items-center justify-center"
+                >
+                  <ChevronRight className="size-3 transition-transform group-data-[state=open]/trigger:rotate-90" />
+                </button>
+              </CollapsibleTrigger>
+            ) : (
+              <span className="size-4 shrink-0" />
+            )}
+            <Link to="/files" search={{ path: folderPath }} className="flex min-w-0 flex-1 items-center gap-2">
+              <Folder className="size-4 shrink-0" />
+              <span className="truncate">{folder.name}</span>
+            </Link>
+          </div>
         </SidebarMenuSubButton>
         <CollapsibleContent>
           {subFolders.length > 0 && (