Completes the billing surface; pairs with sase.tr#29.
Admin SDK
- changePlan(input) + cancelSubscriptionById(input) + resumeSubscription(input).
- PlanChangeResult + SubscriptionStateChange types exported.
- SASE_ADMIN_ENDPOINTS lists the three new spoke routes.
Route
- /api/sase/subscriptions/[subId] now accepts change-plan/cancel/resume
in addition to trial-extend/activate. newPlanId required when
action=change-plan. Reason ≥ 5 chars enforced. Audit captures the
action + days + newPlanId + reasonLen on both paths.
Repo
- getUser() also returns currentPlanId for the plan picker.
UI
- BillingActions extended:
active/trial → [Plan değiştir][İptal et]
cancelled → [Devam ettir]
- Change-plan modal lists active plans (current excluded) with brand
count hint. The spoke flags brand-reassignment via response field;
v1 surfaces only the confirmation.
- Cancel uses destructive variant + clear messaging.
Phase D ships the user-management mutation surface — A/B/C/D all live.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>