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/debugLog.ts

@@ -0,0 +1,15 @@
+export function isDebugLogEnabled(): boolean {
+  if (typeof window === 'undefined') return false
+  return new URLSearchParams(window.location.search).get('log') === 'debug'
+}
+
+export function videoDebugLog(message: string, details?: unknown): void {
+  if (!isDebugLogEnabled()) return
+
+  const timestamp = new Date().toISOString()
+  if (details === undefined) {
+    console.log(`[VideoDebug ${timestamp}] ${message}`)
+  } else {
+    console.log(`[VideoDebug ${timestamp}] ${message}`, details)
+  }
+}

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'
+}