Added check for search query

app.py

@@ -34,5 +34,6 @@ if uploaded_image is not None:
 
         # Search functionality
         search_query = st.text_input("Enter a keyword to search within the text")
-        st.markdown(highlight_keywords(extracted_text, search_query), unsafe_allow_html=True)
+        if search_query:
+            st.markdown(highlight_keywords(extracted_text, search_query), unsafe_allow_html=True)