commit f8d3170028b179b7afde7bb6ad539cbfb19a9dd0
Author: Hermes Agent <Hermes@Hermes.Hermes>
Date:   Fri May 15 14:48:09 2026 +0800

    feat: publish linux led manager panel

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e8c75e0
--- /dev/null
+++ b/README.md
@@ -0,0 +1,145 @@
+# LED Manager Panel
+
+一个无第三方依赖的 Linux LED Web 管理面板，用 Python 标准库直接管理：
+
+```text
+/sys/class/leds/
+```
+
+适合 Debian、OpenWrt、Raspberry Pi OS、4G 路由器等 Linux 设备。
+
+你的设备示例：
+
+```text
+blue:wan green:wlan mmc0:: red:power sim:en sim:en2 sim:sel sim:sel2
+```
+
+## 功能
+
+- 列出 `/sys/class/leds/` 下所有 LED
+- 查看 brightness / max_brightness / 当前 trigger
+- 打开 / 关闭 LED
+- 调整亮度
+- 切换 trigger，例如 `none`、`timer`、`netdev`、`mmc0` 等，具体取决于内核暴露的能力
+- 设置 `timer` trigger 的 `delay_on` / `delay_off`
+- “识别 3 秒”闪烁指定 LED
+- 无数据库、无 Node、无 pip 依赖
+
+## 一键安装
+
+```bash
+curl -fsSL https://gitea.chickliu.fun/Hermes/led-manager-panel/raw/branch/main/install.sh | sh
+```
+
+如果设备没有 `curl`，用 `wget`：
+
+```bash
+wget -qO- https://gitea.chickliu.fun/Hermes/led-manager-panel/raw/branch/main/install.sh | sh
+```
+
+默认端口 `8088`，安装后浏览器打开：
+
+```text
+http://设备IP:8088/
+```
+
+自定义端口：
+
+```bash
+PORT=8090 sh -c "$(curl -fsSL https://gitea.chickliu.fun/Hermes/led-manager-panel/raw/branch/main/install.sh)"
+```
+
+## 手动运行
+
+把 `led_panel.py` 上传到设备，例如：
+
+```bash
+scp led_panel.py root@4G-wifi:/root/led_panel.py
+```
+
+在设备上运行：
+
+```bash
+chmod +x /root/led_panel.py
+python3 /root/led_panel.py --host 0.0.0.0 --port 8088
+```
+
+如果设备没有 Python3：
+
+```bash
+# Debian/Ubuntu
+apt update && apt install -y python3
+
+# OpenWrt
+opkg update && opkg install python3
+```
+
+## Debian systemd 安装
+
+```bash
+mkdir -p /opt/led-manager
+cp led_panel.py /opt/led-manager/led_panel.py
+chmod +x /opt/led-manager/led_panel.py
+cp led-manager.service /etc/systemd/system/led-manager.service
+systemctl daemon-reload
+systemctl enable --now led-manager
+systemctl status led-manager
+```
+
+默认端口：`8088`。
+
+## OpenWrt procd 安装
+
+```bash
+mkdir -p /opt/led-manager
+cp led_panel.py /opt/led-manager/led_panel.py
+chmod +x /opt/led-manager/led_panel.py
+cp led-manager.openwrt.init /etc/init.d/led-manager
+chmod +x /etc/init.d/led-manager
+/etc/init.d/led-manager enable
+/etc/init.d/led-manager start
+/etc/init.d/led-manager status
+```
+
+## 安全说明
+
+这个面板会写 `/sys/class/leds/*`，建议只在内网使用，不要直接暴露公网。
+
+如需公网访问，请放到反代后面加认证，或者只监听 `127.0.0.1`：
+
+```bash
+python3 /root/led_panel.py --host 127.0.0.1 --port 8088
+```
+
+## 常见问题
+
+### 1. 按钮提示权限不足
+
+需要 root 运行，因为 `/sys/class/leds/*/brightness` 通常只有 root 可写。
+
+### 2. 某些 LED 不能调亮度
+
+有些 LED 只有 `0/1` 两档，`max_brightness` 会是 `1`。
+
+### 3. 切换 trigger 后亮度不能手动控制
+
+Linux LED 子系统里，手动亮度通常要先切回：
+
+```bash
+echo none > /sys/class/leds/<led-name>/trigger
+```
+
+面板在手动设置亮度时会自动尝试切到 `none`。
+
+### 4. netdev trigger 怎么绑定网卡？
+
+如果某个 LED 支持 `netdev` trigger，切到 netdev 后可能会出现这些文件：
+
+```text
+device_name
+link
+tx
+rx
+```
+
+当前版本先做通用亮度/trigger/timer 管理；如果你要把 `blue:wan` 绑定到具体网卡，我可以继续加 netdev 绑定配置。
diff --git a/install.sh b/install.sh
new file mode 100755
index 0000000..985b408
--- /dev/null
+++ b/install.sh
@@ -0,0 +1,91 @@
+#!/bin/sh
+set -eu
+
+APP_NAME="led-manager"
+APP_DIR="/opt/led-manager"
+PORT="${PORT:-8088}"
+HOST="${HOST:-0.0.0.0}"
+RAW_BASE="${RAW_BASE:-https://gitea.chickliu.fun/Hermes/led-manager-panel/raw/branch/main}"
+
+need_root() {
+  if [ "$(id -u)" != "0" ]; then
+    echo "请用 root 运行：su - 或 sudo sh install.sh" >&2
+    exit 1
+  fi
+}
+
+has_cmd() { command -v "$1" >/dev/null 2>&1; }
+
+download() {
+  url="$1"
+  out="$2"
+  if has_cmd curl; then
+    curl -fsSL "$url" -o "$out"
+  elif has_cmd wget; then
+    wget -qO "$out" "$url"
+  else
+    echo "缺少 curl/wget，无法下载 $url" >&2
+    exit 1
+  fi
+}
+
+install_python_if_possible() {
+  if has_cmd python3; then return 0; fi
+  echo "未发现 python3，尝试安装..."
+  if has_cmd opkg; then
+    opkg update
+    opkg install python3
+  elif has_cmd apt-get; then
+    apt-get update
+    apt-get install -y python3
+  else
+    echo "未发现 opkg/apt-get，请先手动安装 python3" >&2
+    exit 1
+  fi
+}
+
+install_openwrt_service() {
+  echo "检测到 OpenWrt/procd，安装 /etc/init.d/$APP_NAME"
+  download "$RAW_BASE/led-manager.openwrt.init" "/etc/init.d/$APP_NAME"
+  chmod +x "/etc/init.d/$APP_NAME"
+  # Patch host/port in init script if env overrides were provided.
+  sed -i "s/^HOST=.*/HOST=$HOST/" "/etc/init.d/$APP_NAME" || true
+  sed -i "s/^PORT=.*/PORT=$PORT/" "/etc/init.d/$APP_NAME" || true
+  "/etc/init.d/$APP_NAME" enable
+  "/etc/init.d/$APP_NAME" restart || "/etc/init.d/$APP_NAME" start
+  "/etc/init.d/$APP_NAME" status || true
+}
+
+install_systemd_service() {
+  echo "检测到 systemd，安装 led-manager.service"
+  download "$RAW_BASE/led-manager.service" "/etc/systemd/system/$APP_NAME.service"
+  # Patch host/port in service if env overrides were provided.
+  sed -i "s/--host [^ ]* --port [0-9]*/--host $HOST --port $PORT/" "/etc/systemd/system/$APP_NAME.service" || true
+  systemctl daemon-reload
+  systemctl enable --now "$APP_NAME"
+  systemctl restart "$APP_NAME"
+  systemctl status "$APP_NAME" --no-pager || true
+}
+
+need_root
+install_python_if_possible
+mkdir -p "$APP_DIR"
+download "$RAW_BASE/led_panel.py" "$APP_DIR/led_panel.py"
+chmod +x "$APP_DIR/led_panel.py"
+
+if [ -x /sbin/procd ] || [ -d /etc/rc.d ] && has_cmd procd; then
+  install_openwrt_service
+elif has_cmd systemctl && [ -d /run/systemd/system ]; then
+  install_systemd_service
+elif [ -d /etc/init.d ] && [ -f /etc/openwrt_release ]; then
+  install_openwrt_service
+else
+  echo "未检测到 systemd/procd，已安装到 $APP_DIR。手动启动："
+  echo "python3 $APP_DIR/led_panel.py --host $HOST --port $PORT"
+fi
+
+ipaddr="$(hostname -I 2>/dev/null | awk '{print $1}' || true)"
+echo
+echo "安装完成。"
+echo "访问地址： http://${ipaddr:-设备IP}:$PORT/"
+echo "如需修改端口：PORT=8090 sh install.sh"
diff --git a/led-manager.openwrt.init b/led-manager.openwrt.init
new file mode 100755
index 0000000..e911558
--- /dev/null
+++ b/led-manager.openwrt.init
@@ -0,0 +1,23 @@
+#!/bin/sh /etc/rc.common
+
+START=95
+STOP=10
+USE_PROCD=1
+
+PROG=/usr/bin/python3
+APP=/opt/led-manager/led_panel.py
+HOST=0.0.0.0
+PORT=8088
+
+start_service() {
+    procd_open_instance
+    procd_set_param command "$PROG" "$APP" --host "$HOST" --port "$PORT"
+    procd_set_param respawn 3600 5 5
+    procd_set_param stdout 1
+    procd_set_param stderr 1
+    procd_close_instance
+}
+
+service_triggers() {
+    procd_add_reload_trigger led-manager
+}
diff --git a/led-manager.service b/led-manager.service
new file mode 100644
index 0000000..c3d88a1
--- /dev/null
+++ b/led-manager.service
@@ -0,0 +1,14 @@
+[Unit]
+Description=Linux LED Manager Web Panel
+After=network.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/opt/led-manager
+ExecStart=/usr/bin/python3 /opt/led-manager/led_panel.py --host 0.0.0.0 --port 8088
+Restart=on-failure
+RestartSec=3
+
+[Install]
+WantedBy=multi-user.target
diff --git a/led_panel.py b/led_panel.py
new file mode 100755
index 0000000..2e415e0
--- /dev/null
+++ b/led_panel.py
@@ -0,0 +1,287 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Linux LED Manager Panel
+A tiny dependency-free web panel for /sys/class/leds on Debian/OpenWrt/Linux.
+"""
+
+from __future__ import annotations
+
+import argparse
+import html
+import json
+import os
+import re
+import sys
+import time
+import urllib.parse
+from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
+from pathlib import Path
+from typing import Dict, List, Optional, Tuple
+
+LED_ROOT = Path(os.environ.get("LED_ROOT", "/sys/class/leds"))
+NAME_RE = re.compile(r"^[A-Za-z0-9_.:+@=-]+$")
+
+CSS = r"""
+:root { color-scheme: dark; --bg:#0b1020; --card:#121a2f; --muted:#8ea0c0; --text:#e8eefc; --line:#263551; --accent:#5eead4; --danger:#fb7185; --warn:#fbbf24; }
+* { box-sizing: border-box; }
+body { margin:0; font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif; background: radial-gradient(circle at top left,#172554 0,#0b1020 34rem); color:var(--text); }
+.container { max-width: 1180px; margin: 0 auto; padding: 24px; }
+.header { display:flex; justify-content:space-between; gap:16px; align-items:flex-start; margin-bottom:20px; }
+h1 { margin:0 0 6px; font-size:28px; }
+.sub { color:var(--muted); font-size:14px; }
+.grid { display:grid; grid-template-columns: repeat(auto-fill,minmax(310px,1fr)); gap:16px; }
+.card { background: rgba(18,26,47,.92); border:1px solid var(--line); border-radius:18px; padding:16px; box-shadow: 0 10px 30px rgba(0,0,0,.25); }
+.name { font-weight:700; font-size:18px; display:flex; align-items:center; gap:8px; word-break:break-all; }
+.dot { width:12px; height:12px; border-radius:50%; background:#64748b; box-shadow:0 0 12px currentColor; }
+.meta { margin-top:8px; color:var(--muted); font-size:13px; line-height:1.5; }
+.row { display:flex; gap:8px; flex-wrap:wrap; align-items:center; margin-top:12px; }
+button, select, input[type=number], input[type=text] { border:1px solid var(--line); background:#0f172a; color:var(--text); border-radius:10px; padding:9px 10px; font-size:14px; }
+button { cursor:pointer; transition:.15s; }
+button:hover { border-color:var(--accent); transform: translateY(-1px); }
+button.primary { background:#0f766e; border-color:#14b8a6; }
+button.off { background:#3f1d2a; border-color:#7f1d1d; }
+button.warn { background:#422006; border-color:#92400e; }
+input[type=range] { width:100%; accent-color: var(--accent); }
+.range-line { display:grid; grid-template-columns: 1fr 64px; gap:10px; align-items:center; margin-top:14px; }
+.badge { color:#0b1020; background:var(--accent); padding:2px 7px; border-radius:999px; font-size:12px; font-weight:700; }
+.err { background:#450a0a; border:1px solid #7f1d1d; color:#fecaca; padding:12px; border-radius:12px; margin-bottom:16px; }
+.toast { position:fixed; right:16px; bottom:16px; max-width:520px; padding:12px 14px; border-radius:12px; background:#052e2b; border:1px solid #14b8a6; display:none; }
+.small { font-size:12px; color:var(--muted); }
+a { color:var(--accent); }
+@media (max-width: 640px) { .container{padding:14px;} .header{display:block;} }
+"""
+
+JS = r"""
+async function api(path, body) {
+  const opt = body ? {method:'POST', headers:{'Content-Type':'application/json'}, body:JSON.stringify(body)} : {};
+  const r = await fetch(path, opt);
+  const data = await r.json();
+  if (!r.ok || data.ok === false) throw new Error(data.error || ('HTTP '+r.status));
+  return data;
+}
+function toast(msg, bad=false){ const t=document.getElementById('toast'); t.textContent=msg; t.style.display='block'; t.style.background=bad?'#450a0a':'#052e2b'; t.style.borderColor=bad?'#fb7185':'#14b8a6'; setTimeout(()=>t.style.display='none',2600); }
+async function setBrightness(name, value){ try{ await api('/api/brightness',{name,value:Number(value)}); toast(name+' brightness='+value); setTimeout(load,300);}catch(e){toast(e.message,true);} }
+async function setTrigger(name, trigger){ try{ await api('/api/trigger',{name,trigger}); toast(name+' trigger='+trigger); setTimeout(load,300);}catch(e){toast(e.message,true);} }
+async function setDelay(name, field, value){ try{ await api('/api/delay',{name,field,value:Number(value)}); toast(name+' '+field+'='+value); }catch(e){toast(e.message,true);} }
+async function identify(name){ try{ await api('/api/identify',{name}); toast('Blink '+name); setTimeout(load,3200);}catch(e){toast(e.message,true);} }
+function colorOf(n,b){ const s=n.toLowerCase(); if(Number(b)<=0) return '#475569'; if(s.includes('red')) return '#ef4444'; if(s.includes('green')) return '#22c55e'; if(s.includes('blue')) return '#3b82f6'; if(s.includes('wlan')) return '#22c55e'; if(s.includes('wan')) return '#3b82f6'; if(s.includes('power')) return '#ef4444'; if(s.includes('sim')) return '#f59e0b'; return '#5eead4'; }
+function esc(s){ return String(s).replace(/[&<>'"]/g, c=>({'&':'&amp;','<':'&lt;','>':'&gt;',"'":'&#39;','"':'&quot;'}[c])); }
+function card(led){
+  const pct = led.max_brightness>0 ? Math.round(led.brightness*100/led.max_brightness) : 0;
+  const triggers = led.triggers || [];
+  const triggerSelect = triggers.length ? `<select onchange="setTrigger('${esc(led.name)}', this.value)">${triggers.map(t=>`<option value="${esc(t.name)}" ${t.active?'selected':''}>${esc(t.name)}</option>`).join('')}</select>` : '<span class="small">无 trigger 文件</span>';
+  const delay = (led.delay_on !== null || led.delay_off !== null) ? `<div class="row"><span class="small">timer:</span><input type="number" min="0" value="${led.delay_on ?? 500}" onchange="setDelay('${esc(led.name)}','delay_on',this.value)" title="delay_on ms"><input type="number" min="0" value="${led.delay_off ?? 500}" onchange="setDelay('${esc(led.name)}','delay_off',this.value)" title="delay_off ms"></div>` : '';
+  return `<div class="card">
+    <div class="name"><span class="dot" style="background:${colorOf(led.name,led.brightness)};color:${colorOf(led.name,led.brightness)}"></span>${esc(led.name)} ${led.writable?'<span class="badge">可写</span>':'<span class="small">只读/权限不足</span>'}</div>
+    <div class="meta">brightness: <b>${led.brightness}</b> / ${led.max_brightness} (${pct}%)<br>trigger: <b>${esc(led.active_trigger || '-')}</b><br>path: ${esc(led.path)}</div>
+    <div class="range-line"><input type="range" min="0" max="${led.max_brightness || 1}" value="${led.brightness}" oninput="this.nextElementSibling.value=this.value" onchange="setBrightness('${esc(led.name)}', this.value)"><input type="number" min="0" max="${led.max_brightness || 1}" value="${led.brightness}" onchange="setBrightness('${esc(led.name)}', this.value)"></div>
+    <div class="row"><button class="primary" onclick="setBrightness('${esc(led.name)}', ${led.max_brightness || 1})">打开</button><button class="off" onclick="setBrightness('${esc(led.name)}', 0)">关闭</button><button class="warn" onclick="setTrigger('${esc(led.name)}', 'timer')">闪烁</button><button onclick="identify('${esc(led.name)}')">识别3秒</button></div>
+    <div class="row"><span class="small">trigger</span>${triggerSelect}</div>${delay}
+  </div>`;
+}
+async function load(){
+  try { const data = await api('/api/leds'); document.getElementById('root').innerHTML = data.leds.map(card).join('') || '<div class="err">没有发现 LED：/sys/class/leds 为空</div>'; document.getElementById('count').textContent=data.leds.length; }
+  catch(e){ document.getElementById('root').innerHTML='<div class="err">'+esc(e.message)+'</div>'; }
+}
+window.addEventListener('load', ()=>{ load(); setInterval(load, 5000); });
+"""
+
+
+def safe_name(name: str) -> str:
+    name = urllib.parse.unquote(name)
+    if not NAME_RE.match(name) or "/" in name or ".." in name:
+        raise ValueError("invalid led name")
+    return name
+
+
+def led_path(name: str) -> Path:
+    name = safe_name(name)
+    p = LED_ROOT / name
+    try:
+        root = LED_ROOT.resolve(strict=True)
+        resolved = p.resolve(strict=True)
+    except FileNotFoundError:
+        raise ValueError("led not found")
+    if root not in resolved.parents and resolved != root:
+        raise ValueError("invalid led path")
+    return p
+
+
+def read_text(path: Path) -> Optional[str]:
+    try:
+        return path.read_text().strip()
+    except Exception:
+        return None
+
+
+def write_text(path: Path, value: str) -> None:
+    path.write_text(str(value))
+
+
+def parse_triggers(raw: Optional[str]) -> Tuple[List[Dict[str, object]], Optional[str]]:
+    if not raw:
+        return [], None
+    out = []
+    active = None
+    for part in raw.split():
+        is_active = part.startswith("[") and part.endswith("]")
+        name = part[1:-1] if is_active else part
+        if is_active:
+            active = name
+        out.append({"name": name, "active": is_active})
+    return out, active
+
+
+def list_leds() -> List[Dict[str, object]]:
+    leds = []
+    if not LED_ROOT.exists():
+        return leds
+    for p in sorted(LED_ROOT.iterdir(), key=lambda x: x.name):
+        if not p.is_dir():
+            continue
+        name = p.name
+        b = read_text(p / "brightness")
+        mb = read_text(p / "max_brightness")
+        tr_raw = read_text(p / "trigger")
+        triggers, active = parse_triggers(tr_raw)
+        delay_on = read_text(p / "delay_on")
+        delay_off = read_text(p / "delay_off")
+        try:
+            brightness = int(b or 0)
+        except ValueError:
+            brightness = 0
+        try:
+            max_brightness = int(mb or 1)
+        except ValueError:
+            max_brightness = 1
+        writable = os.access(p / "brightness", os.W_OK)
+        leds.append({
+            "name": name,
+            "path": str(p),
+            "brightness": brightness,
+            "max_brightness": max_brightness,
+            "triggers": triggers,
+            "active_trigger": active,
+            "delay_on": int(delay_on) if delay_on and delay_on.isdigit() else None,
+            "delay_off": int(delay_off) if delay_off and delay_off.isdigit() else None,
+            "writable": writable,
+        })
+    return leds
+
+
+class Handler(BaseHTTPRequestHandler):
+    server_version = "LedPanel/1.0"
+
+    def log_message(self, fmt: str, *args):
+        sys.stderr.write("%s - - [%s] %s\n" % (self.client_address[0], self.log_date_time_string(), fmt % args))
+
+    def send_json(self, obj: object, status: int = 200):
+        data = json.dumps(obj, ensure_ascii=False).encode("utf-8")
+        self.send_response(status)
+        self.send_header("Content-Type", "application/json; charset=utf-8")
+        self.send_header("Cache-Control", "no-store")
+        self.send_header("Content-Length", str(len(data)))
+        self.end_headers()
+        self.wfile.write(data)
+
+    def read_body(self) -> Dict[str, object]:
+        length = int(self.headers.get("Content-Length", "0") or 0)
+        if length > 4096:
+            raise ValueError("body too large")
+        raw = self.rfile.read(length).decode("utf-8") if length else "{}"
+        return json.loads(raw or "{}")
+
+    def do_GET(self):
+        parsed = urllib.parse.urlparse(self.path)
+        if parsed.path == "/":
+            body = f"""<!doctype html><html><head><meta charset='utf-8'><meta name='viewport' content='width=device-width,initial-scale=1'><title>LED Manager</title><style>{CSS}</style></head><body><div class='container'><div class='header'><div><h1>LED Manager Panel</h1><div class='sub'>管理 <code>{html.escape(str(LED_ROOT))}</code> 下的 LED；当前 <span id='count'>-</span> 个。页面每 5 秒自动刷新。</div></div><button onclick='load()'>刷新</button></div><div id='root' class='grid'></div></div><div id='toast' class='toast'></div><script>{JS}</script></body></html>"""
+            data = body.encode("utf-8")
+            self.send_response(200)
+            self.send_header("Content-Type", "text/html; charset=utf-8")
+            self.send_header("Content-Length", str(len(data)))
+            self.end_headers()
+            self.wfile.write(data)
+        elif parsed.path == "/api/leds":
+            self.send_json({"ok": True, "leds": list_leds()})
+        else:
+            self.send_json({"ok": False, "error": "not found"}, 404)
+
+    def do_POST(self):
+        parsed = urllib.parse.urlparse(self.path)
+        try:
+            data = self.read_body()
+            name = safe_name(str(data.get("name", "")))
+            p = led_path(name)
+            if parsed.path == "/api/brightness":
+                max_brightness = int(read_text(p / "max_brightness") or 1)
+                value = int(data.get("value", 0))
+                value = max(0, min(max_brightness, value))
+                # manual brightness usually needs trigger none first, ignore if unsupported
+                if (p / "trigger").exists():
+                    try:
+                        write_text(p / "trigger", "none")
+                    except Exception:
+                        pass
+                write_text(p / "brightness", str(value))
+                self.send_json({"ok": True})
+            elif parsed.path == "/api/trigger":
+                trigger = str(data.get("trigger", ""))
+                if not NAME_RE.match(trigger):
+                    raise ValueError("invalid trigger")
+                write_text(p / "trigger", trigger)
+                self.send_json({"ok": True})
+            elif parsed.path == "/api/delay":
+                field = str(data.get("field", ""))
+                if field not in ("delay_on", "delay_off"):
+                    raise ValueError("invalid delay field")
+                value = max(0, int(data.get("value", 0)))
+                write_text(p / field, str(value))
+                self.send_json({"ok": True})
+            elif parsed.path == "/api/identify":
+                old_trigger = read_text(p / "trigger")
+                old_brightness = read_text(p / "brightness")
+                try:
+                    if (p / "trigger").exists():
+                        write_text(p / "trigger", "timer")
+                        if (p / "delay_on").exists(): write_text(p / "delay_on", "200")
+                        if (p / "delay_off").exists(): write_text(p / "delay_off", "200")
+                    else:
+                        mb = int(read_text(p / "max_brightness") or 1)
+                        for _ in range(6):
+                            write_text(p / "brightness", str(mb)); time.sleep(0.2)
+                            write_text(p / "brightness", "0"); time.sleep(0.2)
+                    time.sleep(3)
+                finally:
+                    if old_trigger and "[" in old_trigger:
+                        _, active = parse_triggers(old_trigger)
+                        if active:
+                            try: write_text(p / "trigger", active)
+                            except Exception: pass
+                    if old_brightness is not None:
+                        try: write_text(p / "brightness", old_brightness)
+                        except Exception: pass
+                self.send_json({"ok": True})
+            else:
+                self.send_json({"ok": False, "error": "not found"}, 404)
+        except PermissionError:
+            self.send_json({"ok": False, "error": "权限不足：请用 root 运行，或给 /sys/class/leds 写权限"}, 403)
+        except Exception as e:
+            self.send_json({"ok": False, "error": str(e)}, 400)
+
+
+def main():
+    global LED_ROOT
+    ap = argparse.ArgumentParser(description="Tiny web panel for /sys/class/leds")
+    ap.add_argument("--host", default="0.0.0.0", help="listen host, default 0.0.0.0")
+    ap.add_argument("--port", type=int, default=8088, help="listen port, default 8088")
+    ap.add_argument("--led-root", default=str(LED_ROOT), help="LED sysfs root, default /sys/class/leds")
+    args = ap.parse_args()
+    LED_ROOT = Path(args.led_root)
+    httpd = ThreadingHTTPServer((args.host, args.port), Handler)
+    print(f"LED Manager Panel listening on http://{args.host}:{args.port} ; LED_ROOT={LED_ROOT}", flush=True)
+    httpd.serve_forever()
+
+
+if __name__ == "__main__":
+    main()