Implement visualization directory management in app.py and navigation.py. Added clear_visualization_directory function to prevent users from seeing each other's generated images. Updated IMAGE_PATHS with new sample images and removed unused imports.
Enhance app.py UI with new logo and updated title; add demo assets to .gitattributes. Remove unused main function from navigation.py and streamline .gitignore.
Update app.py and navigation.py for UI enhancements and image path correction. Changed primary color theme in app.py and updated image path in navigation.py to reflect new asset.
