feat: add project links with icons in header

app.py

@@ -187,10 +187,14 @@ with gr.Blocks(title="UniCalli - Chinese Calligraphy Generator / 中国书法生
     gr.Markdown("""
     # 🖌️ UniCalli - 中国书法生成器 / Chinese Calligraphy Generator
     
+    **A Unified Diffusion Framework for Column-Level Generation and Recognition of Chinese Calligraphy**
+    
     Generate beautiful Chinese calligraphy in various styles and by different historical masters.
     
     用不同历史书法大师的风格生成精美的中国书法。
     
+    🌐 [Project Page](https://envision-research.github.io/UniCalli/) | 📄 [Paper](https://arxiv.org/abs/2510.13745) | 💻 [Code](https://github.com/Envision-Research/UniCalli)
+    
     **注意 / Note**: 支持1-7个汉字输入 / Supports 1-7 Chinese characters.
     """)