fixed a stupid bug of llm document reference

app.py

@@ -86,7 +86,9 @@ def respond(
     total_reranked = reranked + reformulated_reranked
     deduped = dedup_by_chapter_event(total_reranked, max_per_group=1)
     expanded_results = expand_with_neighbors(deduped[:3], collection)
-    context = expanded_results[0][0] if expanded_results else ""
+    context = []
+    for idx, text in enumerate(expanded_results):
+        context.append(text[0]) if text else ""
 
     rag_prompt = build_rag_prompt(message, context, system_msg)
     messages = [