Update src/streamlit_app.py

src/streamlit_app.py

@@ -561,6 +561,15 @@ def save_dataset(df: pd.DataFrame, filename: str) -> str:
             return path
     df.to_csv(path, index=False)
     st.info(f"✅ Dataset saved: {filename}.csv")
+
+    with open(path, "rb") as f:
+    st.download_button(
+        label="📥 Download this dataset",
+        data=f,
+        file_name=f"{filename}.csv",
+        mime="text/csv",
+    )
+
     return path
 # ===================== CHART SUGGESTION (MODIFIED MAP SECTION) =====================