✨ New Signup Features:
- Added username field with validation (3+ chars, alphanumeric + underscore)
- Profile image upload with file validation (5MB max)
- DiceBear Adventurer Neutral API integration for random avatars
- Generate new random avatar button with dice emoji
- Initial random avatar generation on page load
🔧 Backend Updates:
- Updated registration API to handle all new fields
- Username uniqueness validation with specific error messages
- Profile image URL storage in database
- Enhanced user response with all profile data
🗄️ Database Migration:
- Added first_name, last_name, username, profile_image_url columns
- Unique constraint on username field
- Migration script with existing user updates
- Default values for existing accounts
🎯 User Experience:
- Real-time form validation with error states
- Loading states for image upload/generation
- File type and size validation
- Clean profile image preview with rounded borders
- Consistent styling with existing theme
Ready for enhanced user profiles! 🚀
