Title disappears on submit

# Title disappears on submit

Students add a title to their paper, submit, and the title is missing on the submission.

## Reproduction

1. As a student, write a document and add a title.
2. Submit the document.
3. View the submission (or see it in the teacher's gradebook).

## Expected

The title the student set is preserved on the submission and displayed.

## Actual

The submission shows no title (or the default "untitled essay"). The student's title is lost.

## Impact

Teachers can't tell submissions apart in the gradebook (compounds the existing "untitled essay" clutter problem — see [features/editable-submission-titles.md](../features/editable-submission-titles.md)). Students see their work mislabeled and lose context for their own portfolio.

## Affected versions

Reported 2026-03-23.

## Suspected cause

Title field probably writes to the document but isn't snapshotted onto the submission at submit time, OR the title write race-conditions with the submit action and gets dropped. Investigate the submission creation path — what fields are copied from the document at submit?

## Workaround

None known to students. Teacher can manually rename in the gradebook if [features/editable-submission-titles.md](../features/editable-submission-titles.md) ships.