fix(qml): resolve runtime reference errors, missing imports, and port change notifications

src/pygui/backend/controllers/device_controller.py

@@ -13,7 +13,6 @@ from typing import Any, Optional
 
 from PySide6.QtCore import Property, QObject, Qt, Signal, Slot
 
-from pygui.backend.controllers.session_controller import SessionController
 from pygui.backend.data.local_settings import LocalSettings
 from pygui.backend.models.data_model import TemperatureTableModel
 from pygui.backend.utils import slot_error_boundary
@@ -26,11 +25,6 @@ from pygui.serialcomm.data_parser import (
 )
 from pygui.serialcomm.serial_port import WaferInfo
 
-# import pygui.backend.wafer_map_item
-
-stream_controller = SessionController()
-# engine.rootContext().setContextProperty("streamController", stream_controller)
-
 log = logging.getLogger(__name__)