Add complete Super Admin panel with 10 pages for platform-level management:
- Dashboard with KPI cards, system health monitoring, subscription plans
- Merchant management with list/detail/approve/suspend/reactivate
- Subscription plan management (Starter/Growth/Pro/Enterprise)
- User management with role assignment
- Role overview across platform
- Real-time system health for 11 microservices
- Feature flags with toggle and rollout percentage
- Audit log from IAM service
- Platform settings and infrastructure overview
- Blue theme (#1E40AF) to distinguish from merchant admin (orange)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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