Add arXiv paper link and citation (2605.13059)

Fix runtime: align sdk_version with Space default Gradio 6.14.0

Add requirements-train.txt for local training dependencies

Fix runtime: use empty Space requirements, move train deps to requirements-train.txt

Fix runtime error: remove gradio and huggingface_hub from requirements.txt

Import BrainAnytime code from GitHub and configure Gradio Space

initial commit