fix: Use hovertext for heatmap to fix TypeError in Plotly

index.html

@@ -801,6 +801,17 @@
                     hoverongaps: false, colorscale: 'Viridis', reversescale: true,
                     colorbar: { title: 'Avg Latency (ms)', titleside: 'right', thickness: 15 },
                     xgap: 2, ygap: 2, hovertemplate: hoverText
+                    const avg = data?.count > 0 ? (data.sum / data.count).toFixed(0) : 'N/A';
+                    const count = data?.count || 0;
+                    return `Model: ${model}<br>Provider: ${provider}<br>Avg Latency: ${avg} ms<br>Requests: ${count}<extra></extra>`;
+                }));
+
+                 const plotData = [{
+                    z: zValues, x: sortedProviders, y: sortedModels, type: 'heatmap',
+                    hoverongaps: false, colorscale: 'Viridis', reversescale: true,
+                    colorbar: { title: 'Avg Latency (ms)', titleside: 'right', thickness: 15 },
+                    xgap: 2, ygap: 2, hovertext: hoverText, // Use hovertext instead of hovertemplate
+                    hoverinfo: 'text' // Tell plotly to use the hovertext
                  }];
 
                  const layout = mergeLayout({