Fix file upload issues on Hugging Face Spaces

- Added enableXsrfProtection = false to .streamlit/config.toml
- Enhanced debugging with file type, ID, and empty file detection
- Added detailed error handling with stack traces
- This should resolve XSRF protection issues preventing uploads on HF Spaces

.streamlit/config.toml

@@ -1,2 +1,3 @@
 [server]
 maxUploadSize = 1024  # 1 GB in MB
+enableXsrfProtection = false  # Disable XSRF protection for Hugging Face Spaces

src/streamlit_app.py

@@ -181,6 +181,8 @@ def main():
     if uploaded_file is not None:
         # Debug file upload info
         st.info(f"📁 File uploaded: {uploaded_file.name} (Size: {uploaded_file.size} bytes)")
+        st.info(f"🔍 File type: {uploaded_file.type}")
+        st.info(f"🔍 File ID: {uploaded_file.file_id}")
         
         # Read and parse JSON
         try:
@@ -188,6 +190,10 @@ def main():
             content = uploaded_file.read()
             st.info(f"📄 Content length: {len(content)} characters")
             
+            if len(content) == 0:
+                st.error("❌ File appears to be empty!")
+                return
+            
             st.info("🔄 Parsing JSON...")
             data = json.loads(content)
             
@@ -357,6 +363,9 @@ def main():
             st.error(f"❌ Invalid JSON file: {e}")
         except Exception as e:
             st.error(f"❌ Error processing file: {e}")
+            st.error(f"Error type: {type(e).__name__}")
+            import traceback
+            st.code(traceback.format_exc())
     
     else:
         # Show example when no file uploaded