Update app.py

fix: upgrade torch to 2.5.1, add HF user 1000, pin numpy<2, pre-download whisper

fix: remove whisper pre-download, use base model to fix HF Spaces build timeout

fix: remove pyaudio/eventlet, fix build order for HF Spaces

fix: install numpy before whisper model pre-download

Add scam pattern engine, HF deployment, and model improvements

Add real-time features: live text analysis, microphone support, dual JSON datasets

Merge and add RoBERTa spam detection model with Flask web app

Add RoBERTa spam detection model with Flask web app

Initial commit