feat: Complete rewrite as Next.js admin dashboard
Major transformation from FastAPI telemetry service to Next.js admin dashboard:
- Next.js 15 App Router with TypeScript
- Prisma ORM with PostgreSQL (same schema, new client)
- TanStack Query for data fetching
- Tailwind CSS + shadcn/ui components
- Admin dashboard with:
- Dashboard stats overview
- Customer management (list, detail, edit)
- Order management (list, create, detail, logs)
- Server monitoring (grid view)
- Subscription management
Pages implemented:
- /admin (dashboard)
- /admin/customers (list + [id] detail)
- /admin/orders (list + [id] detail with SSE logs)
- /admin/servers (grid view)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>