fix：改进atx usb 继电器适配；修复 webrtc 无法建立连接问题；网页样式优化

web/src/lib/streamSignal.ts

@@ -0,0 +1,11 @@
+import type { StreamDeviceLostEventData } from '@/types/websocket'
+
+const AUDIO_STATE_REASONS = new Set(['audio_device_lost', 'audio_reconnecting'])
+
+export function isAudioDeviceLostStateReason(reason: string | null | undefined): boolean {
+  return typeof reason === 'string' && AUDIO_STATE_REASONS.has(reason)
+}
+
+export function isAudioStreamDeviceLostPayload(data: StreamDeviceLostEventData): boolean {
+  return data.kind === 'audio'
+}