Fix nav links opening in new tab and simplify methodology text

- Remove target="_blank" from navigation links so they open in same tab
- Remove unnecessary note about agents without cost/runtime data

Co-authored-by: openhands <openhands@all-hands.dev>

about.py

@@ -36,7 +36,7 @@ def build_page():
             <h2>Methodology</h2>
             <p><strong>Per-benchmark scores:</strong> Each benchmark reports a percentage metric (resolve rate, accuracy, or test pass rate), making scores comparable regardless of dataset size.</p>
             <p><strong>Average score:</strong> Macro-average across all five categories with equal weighting.</p>
-            <p><strong>Cost &amp; Runtime:</strong> Average USD and seconds per task instance. Agents without cost/runtime data are shown separately in Pareto plots.</p>
+            <p><strong>Cost &amp; Runtime:</strong> Average USD and seconds per task instance.</p>
             <p>All evaluations use the <a href="https://github.com/OpenHands/software-agent-sdk" target="_blank">OpenHands Agent SDK</a> with identical configurations per model.</p>
             """
         )

app.py

@@ -97,6 +97,8 @@ fix_nav_links_script = """
                     // If URL parsing fails, leave the href as-is
                 }
             }
+            // Remove target="_blank" from nav links to prevent opening in new tab
+            link.removeAttribute('target');
         });
     }