fix: resolve gRPC FS explorer timeout by fulfilling journal on error status responses. Enhanced frontend error reporting.

fix: exhaustive fix for Node File Explorer 500 errors. Added orchestrator health checks, fixed gRPC subscript bugs, and added detailed production logging.

Integrated FileSystemNavigator for Agent Node Mesh

feat(terminal): overhaul with xterm.js, raw TTY streaming, and dynamic resizing ...

- Replaced simulated terminal with xterm.js for native emulation
- Implemented raw TTY byte streaming over WebSockets
- Added support for persistent shell sessions and window resizing (ioctl TIOCSWINSZ)
- Improved SkillManager with a transparent TTY bypass to prevent thread pool saturation
- Added periodic heartbeat-based latency monitoring (RTT)
- Fixed skill_config parsing crash in AI Hub registry
- Enabled auto-scrolling and terminal-to-PTY grid synchronization

feat: implement real-time node monitoring and workspace initialization strategies

feat(M6): fully integrate gRPC Agent Orchestrator into AI Hub backend, update deployment, and scale multi-node monitoring