feat(PBI-79/ST-1340): commitSprintMembershipAction + gerichte client-store patches
actions/sprints.ts:
- Nieuwe commitSprintMembershipAction(activeSprintId, adds[], removes[]).
- Eligibility-filter voor adds via partitionByEligibility (sprint_id IS NULL
en niet DONE; cross-sprint conflicts → notEligible).
- Race-safety voor removes: alleen stories met huidige sprint_id ==
activeSprintId; rest → conflicts.alreadyRemoved.
- Transactie wrapt twee updateMany-paren (story status mee, task.sprint_id
cascade). Update-paren overgeslagen wanneer leeg.
- Return: { success, affectedStoryIds, affectedPbiIds, affectedTaskIds,
conflicts: { notEligible, alreadyRemoved } }.
stores/product-workspace/store.ts:
- applyMembershipCommitResult({ activeSprintId, addedStoryIds,
removedStoryIds }) patcht entities.storiesById met juiste sprint_id +
status; ledigt sprintMembership.pending. Geen task-veld omdat
BacklogTask geen sprint_id-kolom heeft in de store.
Tests: __tests__/actions/commit-sprint-membership.test.ts (8 cases) — happy
path, DONE-conflict, cross-sprint, race-safety voor removes, transactie-
inhoud (status='IN_SPRINT'/'OPEN'), task-cascade, return-shape, auth-fail.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>