Phase 5 (Admin Panel):
- Customer management: searchable/filterable list, detail view with
tabs (overview/services/billing), suspend/unsuspend actions with
audit logging
- Plan management: full CRUD with create/edit/archive, dynamic
feature key-value editor, service type filters, subscriber counts
- Service management: list with type/status filters, detail view
with provisioning logs, suspend/unsuspend/terminate with
confirmation dialogs
- Invoice management: list with status filters, detail view with
line items and payment transactions, void invoice action
- Admin nav: added Customers, Plans, Services, Invoices links
- 52 tests passing, build clean
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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