refactor: Update clipboard copy method to use modern Clipboard API

src/streamlit_app.py

@@ -531,17 +531,17 @@ if st.session_state.error_log:
         
         js_code = f"""
             <script>
-                // Create a temporary textarea element
+                async function copyToClipboard() {{
-                const textarea = document.createElement('textarea');
+                    try {{
-                textarea.value = `{escaped_error_text}`;
+                        const text = `{escaped_error_text}`;
-                document.body.appendChild(textarea);
+                        await navigator.clipboard.writeText(text);
-                
+                        return true;
-                // Select and copy the text
+                    }} catch (err) {{
-                textarea.select();
+                        console.error('Failed to copy text: ', err);
-                document.execCommand('copy');
+                        return false;
-                
+                    }}
-                // Clean up
+                }}
-                document.body.removeChild(textarea);
+                copyToClipboard();
             </script>
         """
         st.components.v1.html(js_code, height=0)