Can't restore a sub-doc as parent doc

[virgile-dev]

Bug Report

Problematic behavior
If you delete a sub-doc then it's parent they both appear in the trash.
Restauring the subdoc doesn't work. The banner still appears after showing a success message.

Expected behavior/code
If you restore the child first it should become a parent doc.

Steps to Reproduce

1. Create a doc and a sub-doc
2. Then delete sub-doc
3. Delete parent
4. Go in trashbin see that sub-doc is not nested in parent
5. Try and restore the child
6. See success message but the red banner on top is not removed
7. Try and refresh. The doc is not restaured
8. Try and search for it it doesn't appear in the result.

Environment

• Docs version: 4.8.3
• Instance url: docs.numerique.gouv.fr

Possible Solution

Additional context/Screenshots
Add any other context about the problem here. If applicable, add screenshots to help explain.

Capture.video.du.2026-03-25.12-23-54.webm

[virgile-dev]

Linked to #2127 #2121 #1254

[virgile-dev]

And possibly a duplicate of #1489

[AntoLC]

And possibly a duplicate of #1489

Ah yes, it was already flagged actually.