What changed
Restored the previous multi-step submission edit flow.
Reverted the new refactor path for FormData-based submission updates.
Restored the earlier submission update and validation behavior in the portal edit flow.
Reverted related notification/email flow changes introduced by that refactor.
Why this update
The refactored flow introduced reliability issues. This rollback returns the platform to the last stable editing and review-submission behavior.
User impact
Submission editing and revision submission are more consistent again.
No action is required from users.