Plan rule 3c said every module this refactor creates is type-checked from its first commit; web_viewer/tracking.py was on the ignore list because it moved out of app.py with app's existing errors, and mypy skipped the bodies of untyped helpers in all the new modules. tracking.py is off the ignore list, and the 30 new modules get check_untyped_defs. The 25 errors that surfaced were all missing annotations: container annotations (paths_by_key, tracking, server_stats, result, daily_by_role, feed params), casts for page/page_size where pagination guarantees ints, FeedSubscriptionsMixin's two host attributes, and an ignore for Flask-SocketIO's request.sid. No runtime change.
_setup_socketio_handlers, _mark_subscribed, _replay_packet_stream, _disconnect_login_sockets and _cleanup_stale_clients move verbatim to modules/web_viewer/socket_clients.py (AST-identical; the other 25 BotDataViewer methods are unchanged). app.py keeps importing disconnect and emit so modules.web_viewer.app.disconnect and .emit still resolve; as with the earlier mixins, patching those names on app no longer reaches the moved handlers. app.py is 4,868 lines.
agessaman