Improve fact-check prompt: skeptical framing, larger context, more tokens

Upgrade torch to 2.6.0+cpu to fix transformers compatibility

Switch to Tier 1 RoBERTa emotion classifier, restore pre-download

Fix Tier 2 emotion classifier: gain-scaled softmax, exclude neutral

Fix neutral-dominant emotion bug in Tier 2 classifier

Deploy Leo to HuggingFace Spaces