Tema clar/fosc segons el sistema i títol de finestra

jlauncher/__main__.py

@@ -9,11 +9,14 @@ from PySide6.QtWidgets import QApplication, QMessageBox
 from .config import load_config
 from .paths import config_file, data_root
 from .ui.main_window import MainWindow
+from .ui.theme import apply_theme, watch_system_theme
 
 
 def main() -> int:
     app = QApplication(sys.argv)
     app.setApplicationName("jlauncher")
+    apply_theme(app)
+    watch_system_theme(app)
 
     cfg_path = config_file()
     try: