v2: Full claude.ai clone — TinyLlama local model + markdown + artifacts + file upload + multi-provider

fix: update index.css (styles now inline in App.jsx)

🚀 Major upgrade: multi-provider (Groq/Together/OpenRouter/HF), AirLLM local GPU, web search, DeepSeek V3/R1

🚀 Initial Fable AI deployment — open-source models via HF Inference API