Event Cleanup
Recommended
Prefer named event subscriptions that return unsubscribe functions.
Use the Event Explorer to confirm listeners are removed after cleanup.
Common mistake
Subscribing inside render without storing the unsubscribe handle — or creating a session without ever calling dispose().
Prefer one shared session and tear it down with lifecycle.dispose() on route/app unmount (unsubscribes alone are not enough if the session still owns browser listeners).