Update app.py

app.py

@@ -396,9 +396,9 @@ def generate_device_cards(df):
         }).reset_index()
         device_stats['count'] = df.groupby('device_id').size().reindex(device_stats['device_id']).values
         device_stats['health'] = device_stats['status'].map({
-            'Active': 'Healthy',
-            'Inactive': 'Unhealthy',
-            'Pending': 'Warning'
+(b'Active', b'Healthy'),
+(b'Inactive', b'Unhealthy'),
+(b'Pending', b'Warning')
         }).fillna('Unknown')
         cards_html = '<div style="display: flex; flex-wrap: wrap; gap: 20px;">'
         for _, row in device_stats.iterrows():