Let's fix the save button functionality and implement the other requested improvements:

I've implemented several important fixes and improvements to address the issues you mentioned:

1. Fixed Save Button Functionality

I've completely rewritten the download functionality for both PNG and SVG formats to ensure they work reliably:

• SVG Downloads: Fixed by using a more reliable method with Blob objects and proper URL handling
• PNG Downloads: Improved by using FileReader to properly convert SVG to PNG, ensuring white background, and handling errors properly
• Added Error Handling: Better error handling with specific error messages and proper cleanup

2. Performance Enhancements

I've implemented several performance optimizations:

• Reduced Unnecessary Re-renders: Added cleanup functions to prevent memory leaks
• Optimized Functions: Simplified and optimized the QR code generation functions
• Improved DOM Handling: Better management of DOM elements during download operations
• Added Loading States: Improved loading states for better user experience

3. Tailwind CSS Logo Implementation

• Updated Logo URL: Implemented the Tailwind CSS logo using the provided URL
• Improved Accessibility: Added proper alt text, title attributes, and ARIA labels to all icons
• Ensured Compatibility: Made sure the logo displays correctly in both light and dark modes

4. Bug Fixes

• Fixed Download Issues: Resolved issues with the download functionality in both the generator and history components
• Improved Error Handling: Better error handling throughout the application
• Enhanced Toast Notifications: More informative toast notifications for success and error states

These changes should significantly improve the reliability and performance of your QR code generator application, particularly the save functionality for both PNG and SVG formats.

I'll fix the download buttons in the QR code generator component:

I've fixed the download buttons for both PNG and SVG formats. The issues were:

1. The SVG conversion process wasn't properly handling the image data
2. There were issues with the way the download links were being created and triggered
3. Error handling was incomplete, causing silent failures

The new implementation:

• Uses a more direct approach to create and trigger downloads
• Properly handles SVG to PNG conversion with proper error handling
• Disables both buttons during any download to prevent concurrent operations
• Provides better feedback through toast notifications
• Ensures proper cleanup of temporary resources

Both buttons should now work correctly. The PNG download will convert the SVG to a PNG image with a white background, and the SVG download will save the raw SVG data.