add try it yourself

app.py

@@ -188,6 +188,13 @@ Each record shows:
 - **Previous/Next Buttons**: Navigate through records one at a time
 - **Filters**: The Previous/Next buttons respect your active filters
 
+### 🧪 Try It Yourself
+You can try an interactive version of this tool here:
+
+👉 **Hugging Face Space:** https://huggingface.co/spaces/ai4data/datause-extraction
+
+This hosted demo lets you experiment with dataset extraction, highlighting, and validation using real examples.
+
 ### 🔍 Filtering Options
 
 1. **Dataset Status Filter**