fix image similarity detection

src/streamlit_app.py

@@ -145,10 +145,6 @@ st.title("🩺 Multimodal Medical Chatbot")
 query = st.text_input("Enter your medical question or symptom description:")
 uploaded_files = st.file_uploader("Upload an image to find similar medical cases:", type=["png", "jpg", "jpeg"], accept_multiple_files=True)
 
-st.write(f"Number of files: {len(uploaded_files)}")
-for uploaded_file in uploaded_files:
-    st.write(f"File name: {uploaded_file.name}")
-
 
 if query:
     with st.spinner("Searching medical cases..."):
@@ -174,7 +170,11 @@ if query:
         else:
             st.warning("OpenAI API key not found. Please set OPENAI_API_KEY as a secret environment variable.")
 
-if uploaded_files:
+if uploaded_files is not None:
+    st.write(f"Number of files: {len(uploaded_files)}")
+    for uploaded_file in uploaded_files:
+        st.write(f"File name: {uploaded_file.name}")
+
     with st.spinner("Searching medical cases..."):
 
         print(uploaded_files)