Codex Desktop file preview replaces the current tab instead of opening a new file tab

What version of the Codex App are you using (From “About Codex” dialog)?

26.715.70719

What subscription do you have?

ChatGPT Pro

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What issue are you seeing?

When a Markdown file link is clicked in a Codex Desktop task, the file opens in the side-panel preview. Clicking a link to a different Markdown file replaces the current preview rather than opening the second file in a separate preview tab.

What steps can reproduce the bug?

1. Create five harmless Markdown files named tab-1.md, tab-2.md, tab-3.md, tab-4.md, and tab-5.md.
2. Put only neutral placeholder text in each file.
3. Return clickable links to all five files in the Codex Desktop task.
4. Click tab-1.md. It opens in the side-panel file preview.
5. Click any other file link, such as tab-2.md.
6. Observe that the newly selected file replaces the existing preview.

What is the expected behavior?

Each different file should open in a new file-preview tab. The previously opened file should remain available in its own tab.

Additional information

Existing Codex feedback ID: 019f865f-cc58-74a2-8cf4-16c9ed90735d.

The reproduction uses only five neutral placeholder Markdown files.