- Add 15 WebSocket security tests (terminal and OPC)
- Test authentication, authorization, session limits
- Test ping/pong keepalive and resize protocol
- Add 13 tests for passkey router (registration, login, management)
- Add 11 tests for terminal router (configuration, session management)
- Verify passkey privilege escalation fix is in place
- Test terminal known_hosts validation and SSH command building
- Improve test coverage for security-critical WebSocket endpoints