Fix arxiv badge (2605.21171) and add demo badge

README.md

@@ -14,10 +14,11 @@ datasets:
 
 # FTerViT: Fully Ternary Vision Transformer
 
-[![arXiv](https://img.shields.io/badge/arXiv-XXXX.XXXXX-B31B1B?style=for-the-badge&logo=arxiv&logoColor=white)](https://arxiv.org/abs/XXXX.XXXXX)
+[![arXiv](https://img.shields.io/badge/arXiv-2605.21171-B31B1B?style=for-the-badge&logo=arxiv&logoColor=white)](https://arxiv.org/abs/2605.21171)
 [![GitHub](https://img.shields.io/badge/GitHub-FTerViT-181717?style=for-the-badge&logo=github&logoColor=white)](https://github.com/szymonrucinski/FTerViT)
 [![HuggingFace](https://img.shields.io/badge/%F0%9F%A4%97%20HuggingFace-FTerViT-FFD21E?style=for-the-badge)](https://huggingface.co/szymonrucinski/FTerViT)
 [![NeurIPS](https://img.shields.io/badge/NeurIPS-2026-purple?style=for-the-badge)](https://neurips.cc/)
+[![Demo](https://img.shields.io/badge/%F0%9F%A4%97%20Demo-Live-orange?style=for-the-badge)](https://huggingface.co/spaces/szymonrucinski/FTerViT-demo)
 
 Pretrained checkpoints for **FTerViT** — the first fully ternary Vision Transformer where *all* weight matrices and normalization parameters are constrained to {-1, 0, +1}.