feat(led): OpenVFD sysfs (wifi+eth, alarm, play/lan), skip BT without hci

- Write /sys/class/leds/openvfd led_on/led_off (CLAWD_OPENVFD_PATH)
- WiFi product LED: wifi+eth together; SETUP/APPS -> alarm off/on
- LanLed polls hasWiredCarrier -> play; export led.lan, start/stop from client
- BT monitor only if CLAWD_DISABLE_BT unset and hci* exists (RK3528)
- Display strings remain debug-only (数码管暂不驱动)
- install.sh env template: CLAWD_DISABLE_BT, CLAWD_OPENVFD_PATH comments

Made-with: Cursor

install.sh

@@ -167,6 +167,10 @@ CLAWD_LOG_LEVEL=info
 CLAWD_LOG_FILE=1
 # 自定义服务器地址（留空则读 config.json）
 # CLAWD_SERVER=wss://claw.cutos.ai/ws
+# 无蓝牙机型（如部分 RK3528）：强制不写 bluetoothctl
+# CLAWD_DISABLE_BT=1
+# OpenVFD sysfs 根路径（默认 /sys/class/leds/openvfd）
+# CLAWD_OPENVFD_PATH=/sys/class/leds/openvfd
 EOF
   info "环境变量文件已创建：$ENV_FILE ✓"
 fi