feat: add MaiSaka real-time chat flow monitoring component and WebSocket event handling

- Implemented the MaiSakaMonitor component for real-time monitoring of chat flow using WebSocket.
- Created a custom hook `useMaisakaMonitor` to manage WebSocket subscriptions and event states.
- Developed a backend module for broadcasting various monitoring events through WebSocket.
- Added serialization functions for messages and tool calls to optimize data transmission.
- Included event emission functions for session start, message ingestion, cycle start, timing gate results, planner requests/responses, tool executions, and replier requests/responses.

dashboard/src/i18n/locales/zh.json

@@ -38,7 +38,7 @@
       "configTemplate": "配置模板市场",
       "pluginConfig": "插件配置",
       "logViewer": "日志查看器",
-      "plannerMonitor": "计划器&回复器监控",
+      "maisakaMonitor": "MaiSaka 聊天流监控",
       "localChat": "本地聊天室",
       "settings": "系统设置"
     }