fix: retrieved passed as string on optimize tool

app.py

@@ -449,7 +449,8 @@ with gr.Blocks(theme=gr.themes.Soft()) as demo:
                     #"retriever": [r.strip() for r in retriever.split(",") if r.strip()],
                     "retriever": retriever,
                     "embedding_model": [e.strip() for e in embedding_model.split(",") if e.strip()],
-                    "strategy": [s.strip() for s in strategy.split(",") if s.strip()],
+                    #"strategy": [s.strip() for s in strategy.split(",") if s.strip()],
+                    "strategy": strategy,
                     "chunk_sizes": [int(c) for c in chunk_sizes.split(",") if c.strip()],
                     "overlaps": [int(o) for o in overlaps.split(",") if o.strip()],
                     "rerankers": [r.strip() for r in rerankers.split(",") if r.strip()],