Update app.py

app.py

@@ -281,7 +281,7 @@ with st.sidebar:
         model = st.selectbox("Model", options=model_list, index=0)
         system_prompt = st.text_area("System prompt", height=200)
     
-        st.session_state.prefill = st.text_area("Prefill", height=50, value=st.session_state.prefill, placeholder="It only works well with the Claude models.",
+        st.session_state.prefill = st.text_area("Prefill", height=68, value=st.session_state.prefill, placeholder="It only works well with the Claude models.",
                                                 help="You can prefill the assistant's responses. You can also directly type the @prefill command into the chat field (e.g., \"Write a novel. @prefill Sure! I'd be happy to write a novel for you.\")")
         save_prefill = st.toggle("Save the @prefill command input in the sidebar", value=True)
         
@@ -368,18 +368,18 @@ if selected_font != "Default":
     st.markdown(f'<style>body * {{ font-family: "{font_options[selected_font]}", serif !important; }}</style>', unsafe_allow_html=True)
 
 # Change font size
-st.markdown(f'<style>[data-testid="stChatMessageContent"] .st-emotion-cache-cnbvxy p{{font-size: {st.session_state.font_size}px;}}</style>', unsafe_allow_html=True)
+st.markdown(f'<style>[data-testid="stChatMessageContent"] .st-emotion-cache-kj6hex p{{font-size: {st.session_state.font_size}px;}}</style>', unsafe_allow_html=True)
 
 # Change icon size
 # (CSS element names may be subject to change.)
 # (Contributor: ★31 >>538)
 AVATAR_SIZE_STYLE = f"""
                 <style>
-                    [data-testid="chatAvatarIcon-user"] {{
+                    [data-testid="stChatMessageAvatarUser"] {{
                         width: {st.session_state.avatar_size}rem;
                         height: {st.session_state.avatar_size}rem;
                     }}
-                    [data-testid="chatAvatarIcon-assistant"] {{
+                    [data-testid="stChatMessageAvatarAssistant"] {{
                         width: {st.session_state.avatar_size}rem;
                         height: {st.session_state.avatar_size}rem;
                     }}