feat(Dashboard): 添加仪表盘控制器，包含6个统计接口

wanshenmean

2026-03-30 0a94fa4b54ace3d217a7f981fb81af12ee6a20ee

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{"t":0,"agent":"a1dd170","agent_type":"unknown","event":"agent_stop","success":true}
{"t":0,"agent":"a5ca246","agent_type":"unknown","event":"agent_stop","success":true}