Update app.py

app.py

@@ -258,15 +258,16 @@ if st.button("🚀 Run Topic Modeling Pipeline", type="primary", use_container_w
             if "Silhouette Score" in eval_metrics:
                 valid_idx = [i for i, t in enumerate(topics) if t != -1]
                 unique_topics = set([topics[i] for i in valid_idx])
+                
                 if 1 < len(unique_topics) < len(valid_idx):
                     sil_val = float(silhouette_score(
                         np.array([embeddings[i] for i in valid_idx]), 
-                            [topics[i] for i in valid_idx], 
-                            metric='cosine'
-                        ))
-                        sil_status = f"{sil_val:.2f}"
-                    else:
-                        sil_status = "Skipped (Themes need ≥2 sentences)"
+                        [topics[i] for i in valid_idx], 
+                        metric='cosine'
+                    ))
+                    sil_status = f"{sil_val:.2f}"
+                else:
+                    sil_status = "Skipped (Themes need ≥2 sentences)"
 
         # --- RENDER KPI DASHBOARD (UI draws instantly here!) ---
         st.markdown("### 📊 Key Performance Indicators (KPI)")