Add mass training + internet self-teaching features

Align Space app with Kaggle notebook training pipeline

Fix: replace YouTube download with audio upload (HF Spaces blocks outbound HTTP)

Add phrase library + fuzzy matcher for general Bambara/Fula conversation

Improve Bambara/Fula quality + add full correction UI

Fix: disable SSR mode and use port 7860 to unblock HF Spaces startup

Fix: use direct WhisperProcessor/WhisperForConditionalGeneration imports

Fix: robust Whisper import + upgrade Gradio to fix API schema crash

Fix: use AutoModelForSpeechSeq2Seq for transformers 5.x; disable buggy API schema endpoint

Fix: upgrade to Gradio 5 (HfFolder removed from huggingface-hub 1.x)

Initial commit: Sahel-Agri Voice AI