chore: Refactor app.py for improved readability and maintainability

app.py

@@ -1,6 +1,6 @@
 import gradio as gr
-import requests
 import markdown
+import requests
 
 
 def create_chat_html(messages, dataset_id, offset, compare_mode=False, column=""):
@@ -13,8 +13,8 @@ def create_chat_html(messages, dataset_id, offset, compare_mode=False, column=""
         user_content = user_message["content"]
         user_content_html = markdown.markdown(user_content)
         user_content_length = len(user_content)
-        user_html = f'<div class="user-message" style="justify-content: right;">'
-        user_html += f'<div class="message-content">'
+        user_html = '<div class="user-message" style="justify-content: right;">'
+        user_html += '<div class="message-content">'
         user_html += (
             f"<strong>Turn {turn_number} - {user_role.capitalize()}:</strong><br>"
         )
@@ -27,8 +27,8 @@ def create_chat_html(messages, dataset_id, offset, compare_mode=False, column=""
             system_content = system_message["content"]
             system_content_html = markdown.markdown(system_content)
             system_content_length = len(system_content)
-            system_html = f'<div class="system-message" style="justify-content: left;">'
-            system_html += f'<div class="message-content">'
+            system_html = '<div class="system-message" style="justify-content: left;">'
+            system_html += '<div class="message-content">'
             system_html += f"<strong>{system_role.capitalize()}:</strong><br>"
             system_html += (
                 f"<em>Length: {system_content_length} characters</em><br><br>"