feat(gui): add gui_main.py entry point for full PyQt6 application

gui_main.py

@@ -0,0 +1,39 @@
+# Description: GUI entry point for Lemontropia Suite
+# Launches the full PyQt6 application with main window and HUD
+
+import sys
+import os
+from pathlib import Path
+
+# Load .env before anything else
+from dotenv import load_dotenv
+env_path = Path(__file__).parent / ".env"
+load_dotenv(dotenv_path=env_path)
+
+# Add project to path
+sys.path.insert(0, str(Path(__file__).parent))
+
+from PyQt6.QtWidgets import QApplication
+from PyQt6.QtCore import Qt
+from ui.main_window import MainWindow
+
+
+def main():
+    """GUI Application entry point."""
+    # Enable High DPI support
+    os.environ['QT_ENABLE_HIGHDPI_SCALING'] = '1'
+    os.environ['QT_AUTO_SCREEN_SCALE_FACTOR'] = '1'
+    
+    app = QApplication(sys.argv)
+    app.setApplicationName("Lemontropia Suite")
+    app.setApplicationVersion("0.2.0")
+    
+    # Create and show main window
+    window = MainWindow()
+    window.show()
+    
+    sys.exit(app.exec())
+
+
+if __name__ == "__main__":
+    main()