Is your feature request related to a problem? Please describe.

The example page for multipart/form-data POST requests has outdated and minimal styling that makes it difficult to use effectively. The UI lacks clear visual hierarchy, proper spacing, and modern form design patterns, which detracts from the developer experience when testing or learning about axios multipart/form-data functionality.

Describe the solution you'd like

Modernize the UI with clean styling, better spacing, improved form controls, and clear visual hierarchy while maintaining all existing functionality.

Describe alternatives you've considered

No response

Additional context/Screenshots