Enhance file upload functionality: improve drag-and-drop support and add loading state for form submission

Improves donation UI and adds QRIS download button

Add donation modal with payment platforms and cryptocurrency support

Enhance layout responsiveness for QR code display; adjust form section flex properties and improve mobile scrolling behavior for QR code visibility.

Refactor layout for main content and result section; implement flexbox for improved animation and responsiveness in QR code display.

Update layout styles for responsive design; enhance QR code display functionality with animation and visibility control.

Enhance Dockerfile by adding system dependencies for cairo and build tools; update app.js to improve clipboard copy functionality with error handling and visual feedback.

Refactor layout and styles for a modernized QR Code Generator UI; enhance animations, update header and footer design, and improve file upload handling in JavaScript.

Add base styles, components, layout, and main application script for QR Code Generator