add beep detection outline

app.py

@@ -341,6 +341,11 @@ def inference(stream_url, start_time, end_time, beep_detection_on, event_length,
                     trendline_scope='overall',
                     template="plotly_dark")
     
+    if beep_detection_on:
+        # add vertical lines for beep event
+        fig.add_vrect(x0=event_start / fps, x1=event_end / fps, fillcolor="LightSalmon", opacity=0.25, layer="below", line_width=0)
+
+    
     fig.update_layout(legend=dict(
             orientation="h",
             yanchor="bottom",