fix: index error

app.py

@@ -33,5 +33,8 @@ result = semantic_search(text_emb, img_emb, top_k=6)[0]
 columns = st.columns(3) + st.columns(3)
 for i, col in enumerate(columns):
     photo_id = img_id[result[i]["corpus_id"]]
-    img_url = info.loc[info["photo_id"] == photo_id, "photo_image_url"].values[0]
+    target_series = info.loc[info["photo_id"] == photo_id, "photo_image_url"]
+    if len(target_series) == 0:
+        continue
+    img_url = target_series.iloc[0]
     col.image(img_url, use_column_width=True)