fix: Resolve component rendering issues
LogoLoader:
- Make source prop optional with ActivityIndicator fallback
- Add dynamic Lottie import with error handling
- Fix container to use flex: 1
MessageBubble:
- Fix shadow styles to be platform-specific
- Use boxShadow on web, shadow* on iOS, elevation on Android
- Properly handle Platform imports
MessageInput.v2:
- Fix outline style warning
- Use outlineStyle: 'none' instead of outline: 'none'
- Add borderWidth: 0 for consistency
These changes resolve the 'Cannot read properties of undefined' errors
and eliminate React Native style warnings.