fix: 管理后台连接状态 + 修复按钮无响应
连接状态(正式): - /api/display/state 扩展:screens_online(大屏心跳统计,opc/display/heartbeat)+ last_command(最近指令与发布结果) - 前端大屏每 10s 上报心跳(稳定 client_id),后端 30s TTL 统计在线大屏数 - 管理台新增「连接状态」卡片:后端/MQTT/在线大屏/最近指令,3s 轮询刷新 按钮无响应根治: - admin.js 改为 document 事件委托(data-nav/data-control/data-action/复制/预览),不再依赖逐个绑定 - /static 与 /admin 响应加 no-cache 头,杜绝旧 JS/CSS 缓存导致的按钮失效 - SSE 不再自动重载页面(避免与操作回调双重重载清掉反馈);立即播放改为 toast 不重载
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@@ -57,6 +57,8 @@ class Settings:
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TOPIC_COMMAND = _env("DPM_TOPIC_COMMAND", "opc/display/command")
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TOPIC_TICK = _env("DPM_TOPIC_TICK", "opc/dashboard/tick")
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TOPIC_ACK = _env("DPM_TOPIC_ACK", "opc/display/ack")
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TOPIC_HEARTBEAT = _env("DPM_TOPIC_HEARTBEAT", "opc/display/heartbeat")
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SCREEN_TTL = float(_env("DPM_SCREEN_TTL", "30")) # 大屏心跳过期秒数
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# ---- 阿里云 DashScope(LLM + 语音识别) ----
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DASHSCOPE_API_KEY = _env("DASHSCOPE_API_KEY", "")
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