- inject_message now uses session's event_bus (BOSS_TURN reaches WebSocket/SSE)
- asyncio.get_running_loop() replaces deprecated get_event_loop()
- API keys masked in /api/providers response
- ServerSession (renamed from Session) with cleanup() for handler teardown
- Path traversal protection in _resolve_scenario_path
- XSS fix: escapeHtml(d.name) in web UI
- Duplicate imports removed, os/json moved to module level
- WebSocket handler restructured for reliable cleanup
- New tests: cleanup, provider masking, path traversal
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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