Backend APIs added:
- POST /api/v1/nodes/kick - disconnect a node
- POST /api/v1/connect - trigger P2P tunnel between nodes
- GET /api/v1/stats - detailed server statistics
Frontend features:
- Dashboard: real stats from /api/v1/stats (cone/symm/relay counts)
- Node management: table view, kick node, configure tunnels
- SDWAN: enable/disable, CIDR config, IP allocation, online status
- P2P Connect: create tunnel between two nodes from UI
- Event log: tracks all operations
