[Feature]: Add a command to close all open code files

[isaachorowitz]

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the request.

Area

apps/web

Problem or use case

When I open multiple code files, they remain open as tabs/surfaces. I want a single action to close all currently open code files instead of closing each file individually.

Expected behavior

Add a clearly discoverable “Close all open files” action, available from the file tab UI and/or command palette. It should:

• Close all open code-file tabs.
• Leave unrelated surfaces such as chat, terminal, browser, or Git views unchanged.
• Warn about unsaved edits before closing, or provide the existing unsaved-changes handling.
• Preserve the project and thread state.

Smallest useful scope

Add a “Close all files” command to the file-tab context menu and command palette. If any open file has unsaved changes, use the platform’s normal confirmation flow.

Why this matters

Closing many files one at a time is repetitive and makes it harder to reset the workspace after reviewing a task.

Contribution

• I would be open to helping implement this.