Update app.py

Fix OSError in NLTK check and use HistGradientBoostingClassifier

Fix OSError in NLTK check and use HistGradientBoostingClassifier

Add pre-trained model for instant startup

Fix pandas 2.x groupby.apply() column loss and NaN in distress_label sort

Fix Gradio 6 compatibility: move css/theme to launch(), remove show_copy_button

Update README.md

Initial MindWatch deployment

Add HF Space README with metadata

initial commit