Update

app.py

@@ -9,7 +9,14 @@ data = sorted(data, key=lambda x: x["driving_score"], reverse=True)
 rows_html = ""
 for idx, d in enumerate(data, 1):
     paper = f'<a href="{d["paper_link"]}" target="_blank">📄 {d["paper_title"]}</a>' if d["paper_link"] else ""
-    repo = f'<a href="{d["repository_link"]}" target="_blank">🔗</a>' if d.get("repository_link") else "-"
+    
+    # Handle repository - check for null, "-", or empty string
+    repo_link = d.get("repository_link")
+    if repo_link and repo_link != "-" and repo_link != "":
+        repo = f'<a href="{repo_link}" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 16 16" fill="currentColor"><path d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0016 8c0-4.42-3.58-8-8-8z"></path></svg></a>'
+    else:
+        repo = "-"
+    
     row_class = "row-even" if idx % 2 == 0 else "row-odd"
     rows_html += f"""
     <tr class="{row_class}">