What changed

Enables users to save notes on procurement tracker steps independently of completing the step, and to edit notes on steps that are already completed.

Frontend — frontend/src/components/Agreements/ProcurementTracker/ProcurementTrackerStep{One..Six}/

• The notes TextArea is now enabled independently of the step's completion / pre-solicitation state, with a dedicated Save Notes button (data-cy="save-notes-button") that PATCHes only the notes field and surfaces a success/error alert.
• Notes state hydrates from stepXData?.notes and stays in sync via a useEffect, so previously saved notes are shown.
• Completed steps render an inline Edit Notes / Cancel flow, allowing notes to be edited and re-saved without reopening the whole step.
• Added handleSaveNotes to each step's hook and wired it through the component.

Backend — backend/ops_api/ops/validation/rules/procurement_tracker_step.py

• NoUpdatingCompletedProcurementStepRule now allows a notes-only update on a completed step (via EDITABLE_AFTER_COMPLETION = {"notes"}) while still blocking any other field change.
• AcquisitionPlanningRequiredFieldsRule only enforces task_completed_by / date_completed when the step is actually being moved to complete, and treats fields already persisted on the step as satisfied — so notes-only edits and partial updates aren't wrongly rejected.

Tests

• Updated BDD feature + step definitions to cover "notes-only update on a completed step succeeds" and "cannot complete acquisition planning step without required fields".
• Updated the API event test to send the now-required completion fields.
• Extensive unit tests added/updated across all six step components and their hooks.

Issue

#5435

How to test

Backend:

cd backend/ops_api
pipenv run pytest tests/ops/features/test_validate_procurement_tracker_steps.py
pipenv run pytest tests/ops/procurement_tracker/test_procurement_tracker_steps_api.py

Frontend:

cd frontend
bun run test --watch=false src/components/Agreements/ProcurementTracker

Manual:

1. Open an agreement's Procurement Tracker.
2. On an incomplete step, type in the Notes field and click Save Notes — confirm a success alert and that the note persists after reload.
3. Complete a step, then click Edit Notes, change the text, and Save Notes — confirm the note updates and the step stays completed.
4. Click Edit Notes then Cancel — confirm edits are discarded.
5. Confirm you still cannot change non-notes fields on a completed step.

A11y impact

• No accessibility-impacting changes in this PR
• Accessibility changes included and validated against WCAG 2.1 AA intent
• Any temporary suppression includes A11Y-SUPPRESSION metadata (owner, expires, rationale)

Storybook

• No UI component changes in this PR
• Story added for new component in src/components/UI/
• Story updated to reflect changed props/states
• N/A — change is page-specific or non-visual

Screenshots

Definition of Done Checklist

• OESA: Code refactored for clarity
• OESA: Dependency rules followed
• Automated unit tests updated and passed
• Automated integration tests updated and passed
• Automated quality tests updated and passed
• Automated load tests updated and passed
• Automated a11y tests updated and passed
• Automated security tests updated and passed
• 90%+ Code coverage achieved
• Form validations updated

Links

N/A