[Production] Implement comprehensive error handling and logging

[coderabbitai]

Overview

Add production-grade error handling, logging, and monitoring.

Current State

• No error boundaries
• No logging infrastructure
• No error reporting service

Requirements

• Implement error boundaries for React components
• Add global error handler
• Set up logging service: Structured logging, Log levels, Context enrichment, Log rotation
• Integrate error reporting (Sentry/Bugsnag)
• Add user-friendly error messages
• Implement retry mechanisms
• Add crash reporting and error recovery flows
• Add network error handling
• Document error codes
• Write tests

Success Criteria

• No uncaught errors crash the app
• All errors logged and reported
• Clear error messages for users
• Quick error diagnosis in production

Priority: CRITICAL

Estimated Effort: 3-4 days

Labels: production, error-handling, priority:critical

Backlink: Related to PR #2