some refactoring and socket server added

python_app/gui/app_window.py

@@ -30,6 +30,7 @@ from python_app.models.run_config_model import RunConfigModel
 from python_app.orchestration.config_writer import ConfigWriter
 from python_app.orchestration.gui_session_state import GuiSessionState, GuiSessionStateStore
 from python_app.orchestration.live_processing_config import ProcessingLiveConfigWriter
+from python_app.orchestration.locator_runtime import LocatorTcpService
 from python_app.orchestration.preprocess_assets import VISIBLE_PREPROCESS_ASSET_KEYS, preprocess_asset_model
 from python_app.orchestration.process_supervisor import ProcessSupervisor
 from python_app.orchestration.shm_reader import ShmRingReader
@@ -79,6 +80,7 @@ class AppWindow(
         self._supervisor = ProcessSupervisor(self._project_root)
         self._live_config_writer = ProcessingLiveConfigWriter(runtime_dir / "processing_live.json")
         self._gui_session_state_store = GuiSessionStateStore(runtime_dir / "gui_session_state.json")
+        self._locator_service: LocatorTcpService | None = None
 
     def _init_config_profile_state(self) -> None:
         """Resolve startup profile path, load active profile, and queue fallback notices."""
@@ -107,6 +109,7 @@ class AppWindow(
                     "INFO",
                     f"Loaded legacy run config without GUI defaults: {active_profile_path}",
                 )
+        self._locator_service = self._build_locator_service(self._defaults_config)
         self._remember_active_profile_path(active_profile_path, startup=True)
 
     def _init_reader_handles(self) -> None:
@@ -197,9 +200,58 @@ class AppWindow(
         self._log(f"Active config profile: {self._active_profile_path}")
         self._refresh_preprocess_summary_labels()
         self._apply_initial_radar_limits()
+        self._start_locator_service()
         self._write_live_processing_config()
         self._timer.start()
 
+    def _start_locator_service(self) -> None:
+        """Start embedded locator TCP service without failing the GUI."""
+        try:
+            if self._locator_service is None:
+                self._locator_service = self._build_locator_service(self._defaults_config)
+            self._locator_service.start()
+            self._locator_service.publish_empty()
+            self._log(
+                f"Locator TCP server listening on "
+                f"{self._locator_service.host}:{self._locator_service.port}"
+            )
+        except Exception as exc:  # noqa: BLE001
+            self._log_exception("Failed to start locator TCP server", exc, level="WARN")
+
+    def _build_locator_service(self, config: RunConfigModel) -> LocatorTcpService:
+        """Create locator service instance from stable run config."""
+        locator_server = config.runtime.locator_server
+        return LocatorTcpService(
+            host=str(locator_server.host),
+            port=int(locator_server.port),
+            device_id=int(locator_server.device_id),
+            protocol_version=int(locator_server.protocol_version),
+            max_payload_bytes=int(locator_server.max_payload_bytes),
+            client_queue_size=int(locator_server.client_queue_size),
+            logger_name=str(locator_server.logger_name),
+        )
+
+    def _reload_locator_service_from_config(self) -> None:
+        """Rebuild locator service using current stable config and restart if needed."""
+        previous_service = self._locator_service
+        was_running = previous_service is not None and previous_service.is_running()
+        if previous_service is not None:
+            previous_service.stop()
+
+        self._locator_service = self._build_locator_service(self._defaults_config)
+        if not was_running:
+            return
+
+        try:
+            self._locator_service.start()
+            self._locator_service.publish_empty()
+            self._log(
+                "Locator TCP server reloaded from config: "
+                f"{self._locator_service.host}:{self._locator_service.port}"
+            )
+        except Exception as exc:  # noqa: BLE001
+            self._log_exception("Failed to reload locator TCP server from config", exc, level="WARN")
+
     def _resolve_startup_profile_path(self) -> Path:
         """Resolve active profile path from session-state or root fallback path."""
         try:
@@ -434,6 +486,9 @@ class AppWindow(
             self._abort_capture_sequence(resume_pipeline=False)
             # 2) Stop all managed processes/readers.
             self._stop_all_processes()
+            # 3) Stop embedded locator service.
+            if self._locator_service is not None:
+                self._locator_service.stop()
             # 3) Close auxiliary dialog windows.
             if self._preprocess_dialog is not None:
                 self._preprocess_dialog.close()