fix: move theme/css to Blocks for Gradio 4.x

app.py

@@ -135,7 +135,7 @@ THEME = gr.themes.Base(
 def create_interface():
     """Create the Gradio interface."""
     
-    with gr.Blocks(title="Cordon", fill_width=True) as demo:
+    with gr.Blocks(title="Cordon", fill_width=True, theme=THEME, css=CUSTOM_CSS) as demo:
         
         # Header
         gr.HTML("""
@@ -290,4 +290,4 @@ result = analyzer.analyze_file(Path("system.log"))
 
 if __name__ == "__main__":
     demo = create_interface()
-    demo.launch(theme=THEME, css=CUSTOM_CSS)
+    demo.launch()