fix Doodle button

app.py

@@ -184,7 +184,8 @@ def main() -> None:
         if 'web_url' in st.session_state:
             col1, col2 = st.columns(2)
             col1.caption(f"discussing: {st.session_state.web_url}")
-            col2.caption(f"{st.session_state.title}")
+            if 'title' in st.session_state:
+                col2.caption(f"{st.session_state.title}")
 
         if 'content' not in st.session_state:
             init_session()
@@ -200,7 +201,7 @@ def main() -> None:
             st.divider()
 
             content_url = st.text_input(label='Paste your link, e.g. https://expresso.today', label_visibility='collapsed',
-                                        placeholder='Paste your link:')
+                                        placeholder='Paste your link, e.g. https://expresso.today')
             col1, _, _, _, col2 = st.columns(5)
             col1.button("Doodle")
             if col2.button("Random Page"):
@@ -215,7 +216,7 @@ def main() -> None:
                         st.session_state.content = st.session_state.web_page['content']
                     st.experimental_rerun()
                 else:
-                    st.warning("invalid link")
+                    st.warning("Whoops! That link seems to be doing the vanishing act. Could you give it another shot? Magic words: 'Valid Link, Please!' 🪄")
         elif 'content_summary' not in st.session_state:
             content_summary = get_content_summary(content=st.session_state.content, model_name="gpt-3.5-turbo-16k",
                                                   api_key=st.session_state.open_api_key)
@@ -239,7 +240,10 @@ def main() -> None:
             show_question_input()
     except Exception as e:
         logging.error(e)
-        st.warning("Whoops, looks like a hiccup in the system! But no worries, our tech wizards are already on the case, working their magic. In the meantime, how about giving it another shot?")
+        st.warning("""\
+            Whoops, looks like a hiccup in the system! But no worries, our tech wizards are already on 
+            the case, working their magic. In the meantime, how about giving it another shot?
+        """)
         if st.button("Give It Another Go!"):
             st.experimental_rerun()
 
@@ -249,5 +253,6 @@ if __name__ == "__main__":
     main()
 
 # TODO:
+# - connect to langsmith
 # - chat history
 # - store history externaly along with audio description and return from cache