Improve readability and contrast

app.py

@@ -280,16 +280,12 @@ with gr.Blocks(theme=gr.themes.Soft(), css=custom_css) as demo:
         outputs=output
     )
     
+    # Updated copy functionality
     copy_btn.click(
-        None,
-        output,
-        None,
-        _js="""
-        (text) => {
-            navigator.clipboard.writeText(text);
-            return [];
-        }
-        """
+        fn=lambda x: x,
+        inputs=[output],
+        outputs=[],
+        js="(text) => { navigator.clipboard.writeText(text); }"
     )
     
     # Footer with custom class