new GPR parameters and some UI fixes

python_app/gui/app_window.py

@@ -123,6 +123,7 @@ class AppWindow(
             key: str(preprocess_asset_model(self._defaults_config, key).set_name)
             for key in VISIBLE_PREPROCESS_ASSET_KEYS
         }
+        self._selected_preprocess_radar_key = self._radar_key(self._defaults_config)
 
     def _init_capture_state(self) -> None:
         """Initialize one-shot capture and sequence-control flags."""
@@ -161,6 +162,8 @@ class AppWindow(
         self._gpr_selected_geometry = None
         self._phase_viewbox = None
         self._history_run_signature = None
+        self._processor_run_signature = None
+        self._active_processing_mode = "pass_through"
         self._radar_limits: dict[str, float | int] | None = None
 
     def _history_limit_from_config(self) -> int: