feat: implement C#-compatible AES-128-CBC license file parsing and integrate license management UI into AboutDialog

src/pygui/__main__.py

@@ -1,5 +1,6 @@
 import logging
 import sys
+from importlib.metadata import PackageNotFoundError, version
 from pathlib import Path
 
 from PySide6.QtQml import QQmlApplicationEngine
@@ -11,6 +12,7 @@ from pygui.backend.controllers.session_controller import SessionController
 from pygui.backend.data.file_browser import FileBrowser
 from pygui.backend.data.local_settings import LocalSettings
 from pygui.backend.data.local_settings_model import LocalSettingsModel
+from pygui.backend.license.license_model import LicenseModel
 
 # Importing wafer_map_item + trend_chart_item registers @QmlElement types (QML: import ISC.Wafer).
 
@@ -37,12 +39,24 @@ def main() -> int:
     engine.rootContext().setContextProperty("settingsModel", settings_model)
     engine.rootContext().setContextProperty("file_browser", select_file_dialog_model)
 
+    # App version from package metadata so the About dialog can't drift
+    # from pyproject.toml.
+    try:
+        app_version = version("pygui")
+    except PackageNotFoundError:
+        app_version = "dev"
+    engine.rootContext().setContextProperty("appVersion", app_version)
+
     # ===== Device Controller (serial comm) =====
     data_dir = str(settings_model._data_dir)
     raw_settings = LocalSettings.read_settings(data_dir)
     device_controller = DeviceController(raw_settings, data_dir)
     engine.rootContext().setContextProperty("deviceController", device_controller)
 
+    # ===== License Model (About dialog grid, replay trial) =====
+    license_model = LicenseModel(data_dir)
+    engine.rootContext().setContextProperty("licenseModel", license_model)
+
     # ===== Session Controller (live/review wafer dashboard) =====
     raw_settings_dict = raw_settings.__dict__.copy() if hasattr(raw_settings, '__dict__') else {}
     stream_controller = SessionController(settings=raw_settings_dict)