[UX] Error Handling and User Feedback

[seppelz]

Description

Implement comprehensive error handling and user feedback system.

Acceptance Criteria

• [ ] Error boundary implementation
• [ ] User-friendly error messages
• [ ] Offline mode handling
• [ ] API error handling
• [ ] Form validation feedback
• [ ] Success messages
• [ ] Loading states
• [ ] Network status indicators

Technical Implementation

• React Error Boundaries
• Toast notifications
• Form validation system
• Offline detection
• Error tracking integration

Error Scenarios

• API failures
• Network issues
• Invalid user input
• Browser compatibility
• Device limitations

User Feedback Types

• Success notifications
• Warning messages
• Error messages
• Info messages
• Progress indicators

Dependencies

• UI components
• API integration