src/app.js

```javascript
document.addEventListener('DOMContentLoaded', () => {
    // Simple animation for file icons
    document.querySelectorAll('.file-icon').forEach(icon => {
        icon.addEventListener('mouseenter', () => {
            icon.style.color = '#93c5fd';
        });
        icon.addEventListener('mouseleave', () => {
            icon.style.color = '#bfdbfe';
        });
    });
    
    // Initialize feather icons
    feather.replace();
});
```