selenium depends on websocket-client which installs a top-level
`websocket` package that shadows our src/websocket/ module on CI.
Renaming to ws_manager eliminates the conflict entirely — no more
sys.path hacks needed in conftest or Selenium tests.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add 8 tests for timmy_serve/cli.py (start, invoice, status commands)
covering default args, custom args, and output validation
- Add 8 tests for voice_enhanced route covering all intent types
(status, help, swarm, voice, chat fallback) plus error handling
- Add 17 tests for websocket/handler.py covering broadcast to
multiple clients, dead connection cleanup, history trimming,
connect/disconnect, and all convenience broadcast methods
- Add 4 tests for the new GET /swarm/live page route
Total new tests: 37
