Update app.py

app.py

@@ -4,7 +4,7 @@ import zipfile
 import io
 import time
 import textwrap
-import base64
+import requests
 from agents import TopicAgent, ContentAgent, SlideAgent, CodeAgent, DesignAgent, VoiceoverAgent
 
 # Initialize agents
@@ -147,10 +147,12 @@ with st.sidebar:
         voices = voiceover_agent.get_voices()
         
         if voices:
+            # Fixed selectbox syntax
             selected_voice = st.selectbox(
                 "Choose a voice:",
                 options=[v['voice_id'] for v in voices],
                 format_func=lambda id: next((v['name'] for v in voices if v['voice_id'] == id), "Default")
+            )
             st.session_state.selected_voice = selected_voice
         elif voiceover_agent.api_key:
             st.warning("Couldn't load voices. Using default voice.")