Update app.py

adding gradio theme Soft

app.py

@@ -5,6 +5,7 @@ import pytz
 import yaml
 from tools.final_answer import FinalAnswerTool
 
+import gradio as gr
 from Gradio_UI import GradioUI
 
 # Below is a tool that gets a list of books from an app I built on Replit
@@ -87,6 +88,6 @@ agent = CodeAgent(
     description=None,
     prompt_templates=prompt_templates
 )
+theme = gr.themes.Soft()
 
-
-GradioUI(agent).launch()
+GradioUI(agent, theme=theme).launch()