Desktop app (Windows): @ file mention has no autocomplete and folder picker cannot navigate folders

Environment

• Platform: Windows 11 Pro
• App: Claude Code desktop app

Bug description

Two related issues with the @ file mention feature on Windows:

1. No intellisense/autocomplete when typing @ — Typing @ followed by a partial filename in the chat input produces no dropdown or autocomplete suggestions. The feature appears to do nothing on Windows desktop.

1. Folder picker cannot navigate folders — When attempting to set a project folder (e.g. when starting a new session), the folder picker UI does not allow navigating into subdirectories. It is not possible to select a nested folder as the working directory.

Expected behavior

• Typing @ followed by partial filename should show a filtered list of matching files from the project directory.
• The folder picker should allow navigating into subdirectories to select the desired project root.

Impact

Without a working folder picker, no project directory can be set. Without a project directory, @ file autocomplete cannot function. Both features are effectively broken on Windows desktop.

Steps to reproduce

1. Open Claude Code desktop app on Windows 11.
2. Start a new session and attempt to select a project folder — folder navigation is not possible.
3. In an existing session, type @ followed by a partial filename — no autocomplete appears.

🤖 Generated with Claude Code