Update frontend.py

frontend.py

@@ -136,15 +136,9 @@ with tab2:
         <code>industry</code>, <code>product_category</code>, <code>device</code> <span style='color:#aaa;'>(optional)</span></div>
     """, unsafe_allow_html=True)
 
-    sample_df = pd.DataFrame({
-        "review": ["This app helps me manage my medical appointments smoothly.", "The mobile battery drains fast when using the banking app.", "Streaming service loads slowly on Smart TV."],
-        "industry": ["Healthcare", "Banking", "Entertainment"],
-        "product_category": ["Healthcare Devices", "Banking App", "Streaming App"],
-        "device": ["Android", "iOS", "Smartwatch"]
-    })
-    sample_csv = sample_df.to_csv(index=False).encode("utf-8")
-    with st.expander("📎 Sample CSV"):
-        st.download_button("⬇️ Download sample CSV", sample_csv, "sample_reviews.csv", mime="text/csv")
+    with st.expander("📄 Sample CSV"):
+    with open("sample_reviews.csv", "rb") as f:
+        st.download_button("⬇️ Download sample CSV", f, file_name="sample_reviews.csv")
 
     uploaded_file = st.file_uploader("📁 Upload your CSV", type="csv")