Update app.py

app.py

@@ -175,6 +175,27 @@ def log_prediction(record):
 st.set_page_config(page_title="Next Day Bitcoin Price Movement", layout="wide")
 st.title("🔮 Next Day Bitcoin Price Movement Predictor")
 
+# ---------------------------- DONATION SIDEBAR ----------------------------
+with st.sidebar:
+    st.markdown("### 💛 Support This Free App")
+    st.write(
+        "This BTC prediction tool is free for the community.\n"
+        "If you find it useful, you can help by defraying hosting & API costs. "
+    )
+
+    st.markdown("**ETH donation address:**")
+    st.code("0xf8c2922e4d4d3568d898eea2ec7f63ee1151993c")
+    st.image(
+        "eth_qr.png",
+        caption="Scan to donate via Ethereum",
+        use_column_width=True,
+    )
+
+    st.caption(
+        "Thank you for supporting independent projects!"
+    )
+
+
 date = st.date_input("Select a date", datetime.today() - timedelta(days=1))
 month = date.strftime("%Y-%m")