fix black bg

Author: programmersd21

app/main.py

@@ -60,6 +60,7 @@ def show_editor(path: str | None = None, example: bool = False, new: bool = Fals
         home_window.close()
 
     home_window = QMainWindow()
+    home_window.setStyleSheet("QMainWindow { background-color: #ffffff; }")
     home_screen = HomeScreen()
     home_window.setCentralWidget(home_screen)
     home_window.setWindowTitle("EfficientManim")