docs: 添加首页仪表盘图表功能设计

wanshenmean

2026-03-30 8f3d4ce067d4b39b05849f086188af6ce5d564b3

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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}