- Remove event bus tab listeners from daemon — track tabs directly
- Remove dead event bus fallback branches from commands/browser.py
- Replace SwitchTabEvent/CloseTabEvent dispatches with direct CDP calls
- Update python_session.py to use ActionHandler instead of event bus
- Add JS dialog handler (alert/confirm/prompt) to CLIBrowserSession
- Surface auto-dismissed popup messages in state output
- Only dummy EventBus() for watchdog constructors remains (unavoidable)