feat(server): add robust WebSocket reconnection and safe TCP handling

[jinzhongjia]

• implement automatic reconnection manager with exponential backoff and user notifications
• add safe_tcp module to wrap TCP operations and prevent stack errors
• enhance server status reporting with connection, reconnection, and error statistics
• update command interface with :ClaudeCodeReconnect and improved :ClaudeCodeStatus details
• refactor client and server modules to use safe TCP wrappers for reliability
• add comprehensive unit tests for reconnection and safe_tcp modules

[jinzhongjia]

This is a draft that is specifically used to deal with the problem of dormant reconnection.