feat: implement WebSocket real-time sync with HMAC message authentication

[typelets]

Summary

• Implement WebSocket service with cryptographic message authentication (HMAC-SHA256)
• Add secure logging system with production/development modes
• Create real-time note and folder synchronization across clients
• Fix all TypeScript errors and improve code quality

Key Features

• Real-time Sync: WebSocket-based synchronization for notes and folders across multiple clients
• Message Authentication: HMAC-SHA256 cryptographic signing prevents message tampering and replay attacks
• Secure Logging: Production-safe logging that redacts sensitive data and suppresses transient errors
• Responsive Design: Enhanced desktop layout with collapsible panels and WebSocket status indicators

Security Improvements

• Remove authentication fallback mechanisms for stricter security
• Implement session-based message authentication with JWT-derived secrets
• Add timestamp and nonce validation to prevent replay attacks
• Update security documentation with comprehensive real-time sync details

Technical Improvements

• Fix ArrayBuffer/SharedArrayBuffer compatibility issues in file encryption
• Resolve all TypeScript type errors and ESLint warnings

Test plan

• Verify WebSocket connection establishes successfully
• Test real-time note editing across multiple browser tabs
• Confirm message authentication works (check console for signature verification)
• Test graceful fallback when WebSocket is unavailable
• Verify secure logging redacts sensitive data in production mode
• Test responsive panel behavior on desktop

[github-actions]

🎉 This PR is included in version 1.14.0 🎉

The release is available on GitHub release

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