Initial commit: TaskPool React panel

- React frontend with route-level code splitting
- Backend rebranded from Baihu to TaskPool
- DB brand migration script and local compatibility

internal/models/vo/ws_vo.go

@@ -0,0 +1,8 @@
+package vo
+
+// WSMessage 通用 WebSocket 消息结构
+type WSMessage struct {
+	Type      string      `json:"type"`      // 事件类型: task_status, notice, system_stats
+	Timestamp int64       `json:"timestamp"` // 毫秒时间戳
+	Payload   interface{} `json:"payload"`   // 负载数据
+}