更新音频调试日志和修复脚本，添加 HDMI 监控工具

docs/linux-hdmi/systemd-user/kaisa-hdmi-watchdog.service

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+# 周期性：verify（严格退出码）失败则 PCI reset + doctor --fix，再 verify。
+# 需：1) 桌面用户登录会话  2) sudoers NOPASSWD 指向 reset-sof-hdmi-pci.sh 绝对路径
+#
+# 安装（将 @REPO@ 换成仓库路径）：
+#   mkdir -p ~/.config/systemd/user
+#   sed "s|@REPO@|$HOME/文档/chromebox_10th_audio_driver|g" kaisa-hdmi-watchdog.service > ~/.config/systemd/user/kaisa-hdmi-watchdog.service
+#   chmod +x @REPO@/scripts/kaisa-audio-hdmi-watchdog.sh @REPO@/scripts/kaisa-audio-doctor.sh @REPO@/scripts/reset-sof-hdmi-pci.sh
+#   systemctl --user daemon-reload
+#   systemctl --user enable --now kaisa-hdmi-watchdog.timer
+#
+[Unit]
+Description=Kaisa HDMI: verify then reset+fix on failure (watchdog one-shot)
+After=wireplumber.service pipewire-pulse.service pipewire.service
+Wants=wireplumber.service
+
+[Service]
+Type=oneshot
+# 单次周期；间隔由 .timer 控制。默认仅测已连接 HDMI（--only-connected）。
+ExecStart=@REPO@/scripts/kaisa-audio-hdmi-watchdog.sh --loops 1

docs/linux-hdmi/systemd-user/kaisa-hdmi-watchdog.timer

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+# 每 5 分钟触发一次 kaisa-hdmi-watchdog.service（可按需修改 OnUnitActiveSec）。
+#
+[Unit]
+Description=Timer for Kaisa HDMI watchdog (verify / reset+fix)
+
+[Timer]
+OnBootSec=3min
+OnUnitActiveSec=5min
+AccuracySec=1min
+Persistent=true
+
+[Install]
+WantedBy=timers.target