/* ==========================================================================
   评论后台 —— artalk-cf 管理面板
   纯原生 JS，零依赖。对接本服务已有的 Artalk API v2。
   ========================================================================== */
(function () {
'use strict';

// ============================================================ 基础工具

const API = location.origin + '/api/v2';
// 订阅服务跑在 Cloudflare Worker 上。后台若部署在国内机，同源请求会由 nginx
// 反代过去；部署在 Worker 上时 location.origin 就是 api.200181.xyz，行为一致。
const RSS_API = location.origin;
const LS_T = 'atk.token';
const LS_U = 'atk.user';

const $ = (s, r = document) => r.querySelector(s);
const $$ = (s, r = document) => Array.prototype.slice.call(r.querySelectorAll(s));

/** HTML 转义 —— 所有来自评论/用户的数据都必须过这一层 */
const esc = (v) => String(v == null ? '' : v).replace(/[&<>"']/g, (m) =>
  ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }[m]));

/** 把用户写的 HTML 评论压成安全纯文本，表情图用占位符代替 */
function plainify(html) {
  const t = String(html == null ? '' : html)
    .replace(/<img[^>]*>/gi, '[图]')
    .replace(/<br\s*\/?>/gi, '\n')
    .replace(/<\/(p|div|li)>/gi, '\n')
    .replace(/<[^>]+>/g, '');
  return esc(t).replace(/\n{3,}/g, '\n\n').trim();
}

const nfmt = (n) => Number(n || 0).toLocaleString('zh-CN');

function qs(obj) {
  const u = new URLSearchParams();
  for (const k of Object.keys(obj)) {
    const v = obj[k];
    if (v !== '' && v != null) u.set(k, String(v));
  }
  return u.toString();
}

const truncate = (s, n) => (String(s || '').length > n ? String(s).slice(0, n) + '…' : String(s || ''));

// ============================================================ 角色
//
// 后台两档角色（服务端 users.role，权威实现在 blog-admin/src/lib/role.ts）：
//   admin  管理员 —— 全部模块
//   editor 编辑   —— 只有「文章编辑」，而且只能写 / 发布自己的文章
// 服务端已经归一化过一次（is_admin 优先），这里再兜一次，
// 兼容缓存里的老 state.me（localStorage 可能还留着改造前的结构）。
function roleOf(u) {
  if (!u) return 'user';
  if (u.is_admin) return 'admin';
  return u.role === 'editor' ? 'editor' : u.role === 'admin' ? 'admin' : 'user';
}
/** 当前登录者是不是编辑（决定导航能画几项、作者能不能改） */
function isEditor() { return roleOf(state.me) === 'editor'; }
/** 能进写作后台的角色 */
function canEnterBackend() { const r = roleOf(state.me); return r === 'admin' || r === 'editor'; }
/** 用户列表里的角色标签 */
function roleTag(u) {
  const r = roleOf(u);
  if (r === 'admin') return ' <span class="tag acc">管理员</span>';
  if (r === 'editor') return ' <span class="tag">编辑</span>';
  return '';
}

// ============================================================ 状态

const state = {
  tab: 'dash',
  sites: [],
  site: '',
  me: null,
  // 国内机模式：后台静态页部署在国内机（writeapi.usj.cc），编辑器接口同机直连，
  // 登录态是本机签发的 Cookie 会话，整条链路不过 Cloudflare。
  direct: false,
  pending: 0,
  c: { q: '', type: 'all', offset: 0, limit: 20, total: 0, denom: 1, rows: [], busy: false },
  p: { offset: 0, limit: 30, total: 0 },
  u: { offset: 0, limit: 30, total: 0, q: '', rows: [] },
  openReps: new Set(),
  // 文章编辑
  po: { q: '', page: 1, perPage: 20, total: 0, totalPages: 1, rows: [], busy: false },
  ed: null, // 打开某篇时：{ id, slug, post, fm, body, dirty, busy, git }
};

const TABS = [
  { id: 'dash', label: '仪表盘', group: '', icon: 'dash' },
  { id: 'comments', label: '评论管理', group: '内容管理', icon: 'comments' },
  { id: 'posts', label: '文章编辑', group: '内容管理', icon: 'posts' },
  { id: 'pages', label: '页面管理', group: '内容管理', icon: 'pages' },
  { id: 'users', label: '用户管理', group: '内容管理', icon: 'users' },
  { id: 'feeds', label: '订阅源', group: '订阅中心', icon: 'feeds' },
  { id: 'links', label: '友链', group: '订阅中心', icon: 'links' },
  { id: 'settings', label: '系统设置', group: '系统', icon: 'settings' },
  { id: 'status', label: '运行状态', group: '系统', icon: 'status' },
];

// 16px 线性图标（stroke 继承 currentColor）
const I = (p) =>
  '<svg viewBox="0 0 24 24" width="15" height="15" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">' + p + '</svg>';
const ICONS = {
  dash: I('<path d="M3 10.5 12 3l9 7.5"/><path d="M5 9.5V21h5v-6h4v6h5V9.5"/>'),
  comments: I('<path d="M21 11.5a8.4 8.4 0 0 1-8.5 8.4c-1.2 0-2.4-.2-3.4-.7L3 21l1.8-4.6A8.4 8.4 0 1 1 21 11.5z"/>'),
  posts: I('<path d="M14 3H6a1 1 0 0 0-1 1v16a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1V8z"/><path d="M14 3v5h5"/><path d="M8.5 13h7M8.5 16.5h4.5"/>'),
  pages: I('<path d="M14 3H6a1 1 0 0 0-1 1v16a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1V8z"/><path d="M14 3v5h5"/>'),
  users: I('<circle cx="9" cy="8" r="3.5"/><path d="M3.5 20a5.5 5.5 0 0 1 11 0"/><path d="M16 4.6a3.5 3.5 0 0 1 0 6.8M17.5 14.5a5.5 5.5 0 0 1 3 5"/>'),
  feeds: I('<path d="M4 11a9 9 0 0 1 9 9"/><path d="M4 4a16 16 0 0 1 16 16"/><circle cx="5.2" cy="18.8" r="1.5"/>'),
  links: I('<path d="M10 14a4.5 4.5 0 0 0 6.4 0l3.2-3.2a4.5 4.5 0 1 0-6.4-6.4l-1.6 1.6"/><path d="M14 10a4.5 4.5 0 0 0-6.4 0l-3.2 3.2a4.5 4.5 0 1 0 6.4 6.4l1.6-1.6"/>'),
  settings: I('<circle cx="12" cy="12" r="3.2"/><path d="M12 2.8v2.4M12 18.8v2.4M4.9 4.9l1.7 1.7M17.4 17.4l1.7 1.7M2.8 12h2.4M18.8 12h2.4M4.9 19.1l1.7-1.7M17.4 6.6l1.7-1.7"/>'),
  status: I('<path d="M3 12h4l3-8 4 16 3-8h4"/>'),
  moon: I('<path d="M20.5 14.5A8.5 8.5 0 1 1 9.5 3.5a7 7 0 0 0 11 11z"/>'),
  out: I('<path d="M9 4H5.5A1.5 1.5 0 0 0 4 5.5v13A1.5 1.5 0 0 0 5.5 20H9"/><path d="M15 16l4-4-4-4M19 12H9"/>'),
  eye: I('<path d="M2.5 12S6 5.8 12 5.8 21.5 12 21.5 12 18 18.2 12 18.2 2.5 12 2.5 12z"/><circle cx="12" cy="12" r="2.8"/>'),
  edit: I('<path d="M4 20h4L19.5 8.5a2.12 2.12 0 0 0-3-3L5 17v3z"/><path d="M13.5 6.5l3 3"/>'),
  trash: I('<path d="M4 7h16"/><path d="M9.5 7V4.5h5V7"/><path d="M6.5 7l1 13h9l1-13"/><path d="M10 11v5M14 11v5"/>'),
};

// ============================================================ HTTP

let TOKEN = localStorage.getItem(LS_T) || '';

const sleep = (ms) => new Promise((r) => setTimeout(r, ms));

/**
 * 带重试的请求。
 * GET 是幂等的，网络抖一下（浏览器报 Failed to fetch / ERR_CONNECTION_*）
 * 不该让用户看到「打开失败」——换个连接重试一两次基本就好了。
 * 非 GET 一律不重试：写操作重放可能造成重复写入。
 */
async function api(path, opt) {
  opt = opt || {};
  const method = (opt.method || 'GET').toUpperCase();
  const tries = opt.retries != null ? opt.retries : (method === 'GET' ? 3 : 1);

  let res = null;
  let lastErr = null;

  for (let i = 0; i < tries; i++) {
    if (i) await sleep(i === 1 ? 350 : 900);
    const headers = {};
    if (opt.body !== undefined) headers['Content-Type'] = 'application/json';
    if (TOKEN) headers['Authorization'] = 'Bearer ' + TOKEN;
    try {
      res = await fetch(API + path, {
        method,
        headers,
        body: opt.body !== undefined ? JSON.stringify(opt.body) : undefined,
        signal: opt.signal,
      });
      break;
    } catch (e) {
      res = null;
      lastErr = e;
      // 主动取消（AbortError）不是网络问题，别重试
      if (e && e.name === 'AbortError') break;
    }
  }

  if (!res) {
    const offline = typeof navigator !== 'undefined' && navigator.onLine === false;
    const why = offline ? '本机网络已断开' : (lastErr && lastErr.message ? lastErr.message : '请求被中断');
    throw new Error('网络不可达（' + why + '，已重试 ' + tries + ' 次）—— 检查网络后重试');
  }

  const txt = await res.text();
  let data = null;
  try { data = txt ? JSON.parse(txt) : null; } catch (e) { data = { msg: txt }; }

  if (!res.ok) {
    // 401/403 一律视为会话失效，回登录门
    if (res.status === 401 || res.status === 403) {
      const e = new Error((data && data.msg) || '未授权');
      e.status = res.status;
      throw e;
    }
    throw new Error((data && (data.msg || data.error)) || 'HTTP ' + res.status);
  }
  return data;
}

// 订阅后端请求。凭据不再单独让用户输 —— 见下方注释。
async function rssApi(path, opt) {
  opt = opt || {};
  const u = new URL(RSS_API + path);

  const headers = {};
  if (opt.body !== undefined) headers['Content-Type'] = 'application/json';
  // Cloudflare 版：带后台会话，订阅接口的 requireAuth 直接认（不再要「订阅口令」）
  // 国内机版：TOKEN 为空，请求由本机 editor-api 反代时注入共享令牌
  if (TOKEN) headers['Authorization'] = 'Bearer ' + TOKEN;

  let res;
  try {
    res = await fetch(u.toString(), {
      method: opt.method || 'GET',
      headers,
      body: opt.body !== undefined ? JSON.stringify(opt.body) : undefined,
      signal: opt.signal,
    });
  } catch (e) {
    throw new Error('订阅后端网络不可达');
  }

  const txt = await res.text();
  let data = null;
  try { data = txt ? JSON.parse(txt) : null; } catch (e) { data = { msg: txt }; }

  if (!res.ok) {
    if (res.status === 401 || res.status === 403) {
      const e = new Error((data && (data.error || data.msg)) || '订阅模块未授权');
      e.status = res.status;
      throw e;
    }
    throw new Error((data && (data.error || data.msg)) || 'HTTP ' + res.status);
  }
  return data;
}

// ============================================================ 提示 / 模态

let toastTimer = null;
function toast(msg, bad) {
  const el = $('#toast');
  el.textContent = msg;
  el.className = 'toast' + (bad ? ' bad' : '');
  el.hidden = false;
  clearTimeout(toastTimer);
  toastTimer = setTimeout(() => { el.hidden = true; }, 3200);
}

function modal(title, html) {
  $('#modalTitle').textContent = title;
  $('#modalBody').innerHTML = html;
  $('#modal').hidden = false;
}
function closeModal() { $('#modal').hidden = true; }

function confirmBox(title, text, onYes) {
  modal(title,
    '<p style="margin-top:0">' + esc(text) + '</p>' +
    '<div style="display:flex;gap:10px;justify-content:flex-end;margin-top:20px">' +
      '<button class="btn" data-act="modal-close"><span>取消</span></button>' +
      '<button class="btn danger" id="cfmYes"><span>确定</span></button>' +
    '</div>');
  $('#cfmYes').onclick = async () => {
    const b = $('#cfmYes'); b.dataset.busy = '1';
    try { await onYes(); closeModal(); }
    catch (e) { toast('✕ ' + e.message, true); delete b.dataset.busy; }
  };
}

// ============================================================ 登录 / 登出

function showGate() {
  $('#app').hidden = true;
  $('#gate').hidden = false;

  const foot = $('#lgFoot');
  if (foot) {
    foot.textContent = state.direct
      ? '编辑器走国内机 · 不经过 Cloudflare'
      : '优世界 · 评论与订阅统一管理';
  }
  const pass = $('#lgPass');
  if (pass) pass.value = '';

  setTimeout(() => { const i = $('#lgUser'); if (i) i.focus(); }, 60);
}

function showApp() {
  $('#gate').hidden = true;
  $('#app').hidden = false;
  // 侧栏显示身份：编辑角色标一下，免得 TA 以为自己权限跟管理员一样
  $('#who').innerHTML = esc((state.me && (state.me.name || state.me.email)) || 'admin') +
    (isEditor() ? ' <span class="tag" style="font-size:10px">编辑</span>' : '');
  $('#footR').textContent = 'API v2 · 站点：' + (state.site || '—');
  renderTabs();
  // 编辑进来直接落在文章列表：仪表盘/评论这些它没有权限，默认页只会是 403
  go(isEditor() ? 'posts' : 'dash');
}

function logout(msg) {
  // 国内机模式登录态在 Cookie 里，得让后端删掉会话，否则刷新又进去了
  if (state.direct) {
    fetch(API + '/admin/logout', { method: 'POST', credentials: 'same-origin' }).catch(() => {});
  }
  TOKEN = '';
  state.me = null;
  localStorage.removeItem(LS_T);
  localStorage.removeItem(LS_U);
  showGate();
  if (msg) {
    const err = $('#lgErr');
    err.textContent = msg;
    err.hidden = false;
  }
}

async function doLogin(email, password) {
  const d = await api('/user/access_token', { method: 'POST', body: { email, password } });
  if (!d || !d.token) throw new Error('服务端未返回凭据');
  TOKEN = d.token;
  state.me = d.user || null;
  localStorage.setItem(LS_T, TOKEN);
  try { localStorage.setItem(LS_U, JSON.stringify(state.me)); } catch (e) {}
  return state.me;
}

/**
 * 国内机模式的登录：账号密码发给同机的 editor-api，换一个 HttpOnly Cookie。
 * 全程不出境，也不碰 Cloudflare 的 D1 用户表。
 */
async function directLogin(user, password) {
  let res;
  try {
    res = await fetch(API + '/admin/login', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      credentials: 'same-origin',
      body: JSON.stringify({ user, password }),
    });
  } catch (e) {
    throw new Error('连不上本机编辑器服务（' + (e.message || '网络错误') + '）');
  }
  const d = await res.json().catch(() => null);
  if (!res.ok || !d || !d.ok) {
    throw new Error((d && (d.error || d.msg)) || ('登录失败（HTTP ' + res.status + '）'));
  }
  state.me = d.user || { name: user, is_admin: true, role: 'admin' };
  return state.me;
}

// ============================================================ 骨架

function renderTabs() {
  // 国内机模式：文章编辑走本机直连（不出境）；订阅源/友链由本机后端反代到
  // Cloudflare 的订阅服务（带了共享令牌，前端不用口令）。评论/设置这些还
  // 必须走 Cloudflare 会话（D1 数据在国内访问那一跳很慢），单独留个入口。
  if (state.direct) {
    const t = (id, label) =>
      '<button class="tab' + (state.tab === id ? ' on' : '') + '" data-act="tab" data-id="' + id + '">' +
      (ICONS[id] || '') + '<span>' + label + '</span></button>';
    // 编辑角色：订阅源/友链在国内机侧已经被拒（server.mjs 只放管理员走 rssProxy），
    // 而且它也没有 Cloudflare 的完整会话 —— 干脆不给它画
    $('#tabs').innerHTML =
      t('posts', '文章编辑') +
      (isEditor()
        ? ''
        : '<div class="nav-sep"></div>' +
          '<div class="nav-group">订阅中心</div>' +
          t('feeds', '订阅源') + t('links', '友链') +
          '<div class="nav-sep"></div>' +
          '<div class="nav-group">需要 Cloudflare</div>' +
          '<button class="tab" data-act="relogin">' + I('<path d="M12 3v9"/><path d="M7 7.5a7 7 0 1 0 10 0"/>') + '<span>登录完整后台</span></button>');
    return;
  }
  // 分组渲染：group 为空的（仪表盘）单独在顶部；组间加分隔线
  // ★ 编辑角色只画「文章编辑」一项 —— 其余模块服务端本来就是 403
  //   （见 routes/admin.ts 的 requireAdmin），画出来只会让人点进一片报错。
  const tabs = isEditor() ? TABS.filter((t) => t.id === 'posts') : TABS;
  let html = '';
  let lastGroup = null;
  for (const t of tabs) {
    if (t.group !== lastGroup) {
      if (t.group) {
        if (lastGroup !== null && lastGroup !== '') html += '<div class="nav-sep"></div>';
        html += '<div class="nav-group">' + esc(t.group) + '</div>';
      } else if (lastGroup !== null) {
        html += '<div class="nav-sep"></div>';
      }
      lastGroup = t.group;
    }
    const badge = (t.id === 'comments' && state.pending > 0)
      ? '<span class="n">' + state.pending + '</span>' : '';
    html += '<button class="tab' + (state.tab === t.id ? ' on' : '') + '" data-act="tab" data-id="' + t.id + '">'
      + (ICONS[t.icon] || '') + '<span>' + t.label + '</span>' + badge + '</button>';
  }
  // 国内直连入口：Cloudflare 晚高峰丢包，写文章卡的时候一键切到国内机后台
  // （那边独立登录，点过去会由 Worker 先签一张「免登录票」换会话 Cookie）
  // 编辑也能用 —— 跳过去还是编辑，拿不到管理员权限（签名覆盖了身份）
  html += '<div class="nav-sep"></div>' +
    '<div class="nav-group">线路</div>' +
    '<button class="tab" data-act="cn-line">' + I('<path d="M3 12h4l3 -7 4 14 3 -7h4"/>') +
    '<span>国内线路（直连）</span></button>';
  $('#tabs').innerHTML = html;
}

/** 更新顶栏面包屑：group / label */
function renderCrumb() {
  const t = TABS.find((x) => x.id === state.tab);
  if (!t) return;
  const el = $('#crumb');
  if (el) el.innerHTML = (t.group ? '<span class="cg">' + esc(t.group) + '</span><span class="sp">/</span>' : '')
    + '<span class="pg">' + esc(t.label) + '</span>';
}

function setBusy(sel, on) {
  $$(sel).forEach((b) => { if (on) b.dataset.busy = '1'; else delete b.dataset.busy; });
}

// ============================================================ 路由

async function go(tab) {
  state.tab = tab;
  renderTabs();
  renderCrumb();
  closeSidebar(); // 移动端点完就收起抽屉
  const v = $('#view');
  v.innerHTML = '<div class="loading">加载中…</div>';
  try {
    if (tab === 'dash') await viewDash();
    else if (tab === 'comments') await viewComments();
    else if (tab === 'posts') await viewPosts();
    else if (tab === 'pages') await viewPages();
    else if (tab === 'users') await viewUsers();
    else if (tab === 'settings') await viewSettings();
    else if (tab === 'status') await viewStatus();
    else if (tab === 'feeds') await viewFeeds();
    else if (tab === 'links') await viewLinks();
  } catch (e) {
    if (e.status === 401 || e.status === 403) { logout('会话已失效，请重新登录'); return; }
    if (state.tab !== tab) return; // 已切走，别用旧错误覆盖新视图
    v.innerHTML = '<div class="empty">出错了：' + esc(e.message) + '</div>';
  }
}

// ============================================================ 视图：仪表盘

async function viewDash() {
  const sn = state.site;

  const [total, pages, users, pend, latest, hot] = await Promise.all([
    api('/stats/site_comment?' + qs({ site_name: sn })),
    api('/pages?' + qs({ site_name: sn, limit: 1 })),
    api('/users/all?' + qs({ limit: 1 })),
    api('/comments?' + qs({ scope: 'site', site_name: sn, type: 'pending', limit: 1 })),
    api('/stats/latest_comments?' + qs({ limit: 8 })),
    api('/stats/comment_most_pages?' + qs({ limit: 6 })),
  ]);

  state.pending = pend.count || 0;
  renderTabs();

  const cards = [
    { k: '评论总数', v: total.data || 0, x: '站点「' + sn + '」' },
    { k: '涉及页面', v: pages.count || 0, x: '有评论记录的文章' },
    { k: '评论用户', v: users.count || 0, x: '去重后的人数' },
    { k: '待审核', v: state.pending, x: state.pending ? '需要处理' : '全部已处理' },
  ].map((c) =>
    '<div class="stat"><div class="k">' + c.k + '</div>' +
    '<div class="v">' + nfmt(c.v) + '</div><div class="x">' + esc(c.x) + '</div></div>'
  ).join('');

  const latestRows = (latest.data || []).map((c) =>
    '<div class="mini-i">' +
      '<span class="n">' + esc((c.date || '').slice(5, 16)) + '</span>' +
      '<span class="b"><span class="nm">' + esc(c.nick) + '</span> ' +
        '<span class="tx">' + esc(truncate(String(c.content || '').replace(/<[^>]+>/g, ''), 44)) + '</span></span>' +
      '<span class="c">#' + c.id + '</span>' +
    '</div>'
  ).join('') || '<div class="empty">暂无评论</div>';

  const hotRows = (hot.data || []).map((p) =>
    '<div class="mini-i">' +
      '<span class="b"><span class="nm">' + esc(truncate(p.title || p.key, 26)) + '</span> ' +
        '<span class="tx">' + esc(p.key) + '</span></span>' +
      '<span class="c">' + nfmt(p.comment_count) + '</span>' +
    '</div>'
  ).join('') || '<div class="empty">暂无数据</div>';

  if (state.tab !== 'dash') return;
  $('#view').innerHTML =
    head('仪表盘', 'DASHBOARD', '站点 ' + sn + ' 的评论概览') +
    '<div class="stats">' + cards + '</div>' +
    '<div class="grid2">' +
      '<section class="card"><header class="card-head"><h3>最新评论</h3></header><div class="card-body"><div class="mini">' +
        latestRows + '</div></div></section>' +
      '<section class="card"><header class="card-head"><h3>评论最多的文章</h3></header><div class="card-body"><div class="mini">' +
        hotRows + '</div></div></section>' +
    '</div>';
}

function head(zh, en, sub, actions) {
  void en; // 页头不再显示英文代号
  return '<div class="page-head"><h2>' + esc(zh) + '</h2>' +
    (sub ? '<span class="sub">' + esc(sub) + '</span>' : '') +
    (actions ? '<div class="right">' + actions + '</div>' : '') +
    '</div>';
}

// ============================================================ 视图：评论

async function viewComments() {
  const c = state.c;
  if (state.tab !== 'comments') return;
  $('#view').innerHTML =
    head('评论管理', 'COMMENTS', '', '<button class="btn tiny" data-act="c-reload">刷新</button>') +
    '<div class="ctool">' +
      '<div class="grow"><input id="cq" type="search" placeholder="搜索昵称 / 邮箱 / 内容…" value="' + esc(c.q) + '"></div>' +
      '<select id="ctype" style="width:132px">' +
        ['all|全部评论', 'pending|仅待审核'].map((o) => {
          const [v, l] = o.split('|');
          return '<option value="' + v + '"' + (c.type === v ? ' selected' : '') + '>' + l + '</option>';
        }).join('') +
      '</select>' +
      '<select id="climit" style="width:112px">' +
        [20, 50, 100].map((n) => '<option value="' + n + '"' + (c.limit === n ? ' selected' : '') + '>' + n + ' 条/页</option>').join('') +
      '</select>' +
    '</div>' +
    '<div id="clist"><div class="loading">加载中…</div></div>' +
    '<div id="cpager"></div>';

  const q = $('#cq');
  let tmr = null;
  q.oninput = () => {
    clearTimeout(tmr);
    tmr = setTimeout(() => { c.q = q.value.trim(); c.offset = 0; loadComments(); }, 420);
  };
  $('#ctype').onchange = (e) => { c.type = e.target.value; c.offset = 0; loadComments(); };
  $('#climit').onchange = (e) => { c.limit = parseInt(e.target.value, 10); c.offset = 0; loadComments(); };

  await loadComments();
}

async function loadComments() {
  const c = state.c;
  const box = $('#clist');
  if (!box) return;
  box.innerHTML = '<div class="loading">加载中…</div>';

  // 待审视图走扁平模式：待审的可能是任意层级的回复，按“顶层分页”会整条漏掉
  const useFlat = c.type === 'pending';

  const d = await api('/comments?' + qs({
    scope: 'site',
    site_name: state.site,
    type: useFlat ? 'pending' : '',
    search: c.q,
    limit: c.limit,
    offset: c.offset,
    flat_mode: useFlat ? 'true' : '',
  }));

  if (state.tab !== 'comments' || !document.body.contains(box)) return; // 已切走，丢弃

  // visible=false 是服务端为补全树而带出的“范围外父评论”，管理列表不需要
  c.rows = (d.comments || []).filter((x) => x.visible !== false);
  c.total = d.count || 0;
  // 树形视图按“顶层数”分页；扁平视图按总条数分页
  c.denom = useFlat ? c.total : (d.roots_count != null ? d.roots_count : c.total);
  if (useFlat) state.pending = c.total;
  renderTabs();

  if (!c.rows.length) {
    box.innerHTML = '<div class="empty">' + (c.q ? '没有匹配 “' + esc(c.q) + '” 的评论' : '暂无评论') + '</div>';
    $('#cpager').innerHTML = '';
    return;
  }

  // 按父子关系组织
  const kids = new Map();
  const roots = [];
  const ids = new Set(c.rows.map((x) => x.id));
  for (const r of c.rows) {
    if (r.rid && ids.has(r.rid)) {
      if (!kids.has(r.rid)) kids.set(r.rid, []);
      kids.get(r.rid).push(r);
    } else {
      roots.push(r);
    }
  }

  box.innerHTML = '<div class="clist">' + roots.map((r) => node(r, kids, 0)).join('') + '</div>';

  const pages = Math.max(1, Math.ceil(c.denom / c.limit));
  const cur = Math.floor(c.offset / c.limit) + 1;
  $('#cpager').innerHTML =
    '<div class="pager">' +
      '<button class="btn tiny" data-act="c-prev"' + (c.offset <= 0 ? ' disabled' : '') + '>‹ 上一页</button>' +
      '<span class="info">第 <b>' + cur + '</b> / ' + pages + ' 页 · 共 <b>' + nfmt(c.total) + '</b> 条评论' +
        (useFlat ? '（待审，按条）' : ' / ' + nfmt(c.denom) + ' 个主题') + '</span>' +
      '<button class="btn tiny" data-act="c-next"' + (cur >= pages ? ' disabled' : '') + '>下一页 ›</button>' +
    '</div>';
}

function node(c, kids, depth) {
  const cls = ['citem'];
  if (c.is_pending) cls.push('pend');
  if (c.is_pinned) cls.push('pin');
  if (c.is_collapsed) cls.push('hid');
  if (depth > 0) cls.push('rep');

  const tags = [];
  if (c.is_pinned) tags.push('<span class="tag pink">置顶</span>');
  if (c.is_pending) tags.push('<span class="tag warn">待审</span>');
  if (c.is_collapsed) tags.push('<span class="tag line">折叠</span>');
  if (c.badge_name) tags.push('<span class="tag acc">' + esc(c.badge_name) + '</span>');
  if (c.is_verified) tags.push('<span class="tag blue">博主</span>');

  const ch = kids.get(c.id) || [];
  const opened = state.openReps.has(c.id);

  // 头像：服务端给的 email_encrypted（md5），走前台同一套 weavatar 镜像
  const avatar = 'https://weavatar.com/avatar/' + esc(c.email_encrypted || '') + '?d=mp&s=80';

  return '<article class="' + cls.join(' ') + '" data-cid="' + c.id + '">' +
    '<div class="crow">' +
      '<img class="cavatar" src="' + avatar + '" loading="lazy" alt="" onerror="this.style.visibility=\'hidden\'">' +
      '<div class="cmain">' +
        '<div class="chead">' +
          '<span class="nick">' + esc(c.nick) + '</span>' +
          tags.join('') +
          '<span class="t">#' + c.id + ' · ' + esc(c.date) + '</span>' +
        '</div>' +
        '<div class="cbody">' + (plainify(c.content) || '<span class="ph">（空内容）</span>') + '</div>' +
        '<div class="cfoot">' +
          '<a href="' + esc(c.page_url || '#') + '" target="_blank" rel="noopener" title="' + esc(c.page_url || '') + '">' +
            esc(truncate(c.page_key, 42)) + '</a>' +
          (ch.length ? ' · <span>回复 ' + ch.length + '</span>' : '') +
          (c.ua ? ' · <span title="' + esc(c.ua) + '">' + esc(truncate(c.ua.replace(/^Mozilla\/5\.0\s*/, ''), 26)) + '</span>' : '') +
          '<span class="acts">' +
            (ch.length ? '<button class="btn tiny" data-act="c-toggle" data-id="' + c.id + '">' + (opened ? '收起' : '展开') + '</button>' : '') +
            (c.is_pending ? '<button class="btn tiny" data-act="c-approve" data-id="' + c.id + '">通过</button>' : '') +
            '<button class="btn tiny" data-act="c-pin" data-id="' + c.id + '" data-v="' + (c.is_pinned ? '0' : '1') + '">' + (c.is_pinned ? '取消置顶' : '置顶') + '</button>' +
            '<button class="btn tiny" data-act="c-fold" data-id="' + c.id + '" data-v="' + (c.is_collapsed ? '0' : '1') + '">' + (c.is_collapsed ? '展开' : '折叠') + '</button>' +
            '<button class="btn tiny danger" data-act="c-del" data-id="' + c.id + '">删除</button>' +
          '</span>' +
        '</div>' +
        (ch.length && opened ? '<div class="creplies">' + ch.map((x) => node(x, kids, depth + 1)).join('') + '</div>' : '') +
      '</div>' +
    '</div>' +
  '</article>';
}

// ============================================================ 视图：页面

async function viewPages() {
  const p = state.p;
  const d = await api('/pages?' + qs({ site_name: state.site, limit: p.limit, offset: p.offset }));
  p.total = d.count || 0;
  const rows = d.pages || [];

  if (state.tab !== 'pages') return;
  $('#view').innerHTML =
    head('页面', 'PAGES', '共 ' + nfmt(p.total) + ' 个有评论记录的页面') +
    (rows.length
      ? '<div class="tblwrap"><table><thead><tr>' +
          '<th>页面标题</th><th>访问路径</th><th class="num">票数</th><th>最近活动</th>' +
        '</tr></thead><tbody>' +
        rows.map((r) =>
          '<tr>' +
            '<td><span class="ell">' + (esc(r.title) || '<span style="color:var(--muted)">（无标题）</span>') + '</span></td>' +
            '<td><a class="lk" href="' + esc(r.url) + '" target="_blank" rel="noopener">' + esc(r.key) + '</a></td>' +
            '<td class="num">' + nfmt(r.vote_up) + ' / ' + nfmt(r.vote_down) + '</td>' +
            '<td class="lk">' + esc(r.date) + '</td>' +
          '</tr>').join('') +
        '</tbody></table></div>' +
        pager('p', p, '页')
      : '<div class="empty">暂无页面</div>');
}

function pager(prefix, st, unit) {
  const pages = Math.max(1, Math.ceil(st.total / st.limit));
  const cur = Math.floor(st.offset / st.limit) + 1;
  return '<div class="pager">' +
    '<button class="btn tiny" data-act="' + prefix + '-prev"' + (cur <= 1 ? ' disabled' : '') + '>‹ 上一页</button>' +
    '<span class="info">第 <b>' + cur + '</b> / ' + pages + ' 页 · 共 <b>' + nfmt(st.total) + '</b> ' + unit + '</span>' +
    '<button class="btn tiny" data-act="' + prefix + '-next"' + (cur >= pages ? ' disabled' : '') + '>下一页 ›</button>' +
  '</div>';
}

// ============================================================ 视图：用户

async function viewUsers() {
  const u = state.u;
  if (state.tab !== 'users') return;
  $('#view').innerHTML =
    head('用户', 'USERS', '',
      '<button class="btn tiny primary" data-act="u-new">+ 新建用户</button>' +
      '<button class="btn tiny" data-act="u-reload">刷新</button>') +
    '<div class="ctool"><div class="grow"><input id="uq" type="search" placeholder="按昵称 / 邮箱筛选…" value="' + esc(u.q) + '"></div></div>' +
    '<div id="ulist"><div class="loading">加载中…</div></div>';

  const q = $('#uq');
  let tmr = null;
  q.oninput = () => {
    clearTimeout(tmr);
    tmr = setTimeout(() => { u.q = q.value.trim(); u.offset = 0; loadUsers(); }, 420);
  };
  await loadUsers();
}

async function loadUsers() {
  const u = state.u;
  const box = $('#ulist');
  if (!box) return;
  box.innerHTML = '<div class="loading">加载中…</div>';

  const d = await api('/users/all?' + qs({
    limit: u.limit, offset: u.offset,
    name: u.q.indexOf('@') < 0 ? u.q : '',
    email: u.q.indexOf('@') >= 0 ? u.q : '',
  }));
  u.total = d.count || 0;

  if (state.tab !== 'users' || !document.body.contains(box)) return; // 已切走，丢弃

  const rows = d.users || [];
  u.rows = rows; // 供编辑弹窗取行数据（API 单页上限 200，不能靠再查一次兜住 492 个用户）
  const html = rows.length
    ? '<div class="tblwrap"><table><thead><tr>' +
        '<th>昵称</th><th>邮箱</th><th class="num">评论</th><th>徽章</th><th>近期 IP</th><th></th>' +
      '</tr></thead><tbody>' +
      rows.map((r) =>
        '<tr>' +
          '<td><b>' + esc(r.name) + '</b>' + roleTag(r) + '</td>' +
          '<td class="lk">' + esc(r.email) + '</td>' +
          '<td class="num">' + nfmt(r.comment_count) + '</td>' +
          '<td>' + (r.badge_name
            ? '<span class="tag" style="background:' + esc(r.badge_color || '#0f8') + '22;color:' + esc(r.badge_color || '#0f8') + '">' + esc(r.badge_name) + '</span>'
            : '<span style="color:var(--muted)">—</span>') + '</td>' +
          '<td class="lk">' + esc(r.last_ip || '—') + '</td>' +
          '<td><button class="btn tiny" data-act="u-edit" data-id="' + r.id + '">编辑</button></td>' +
        '</tr>').join('') +
      '</tbody></table></div>' + pager('u', u, '个用户')
    : '<div class="empty">没有匹配的用户</div>';

  box.innerHTML = html;
}

/**
 * 角色下拉 —— 一个控件同时表达三档。
 * 拆成「管理员 checkbox + 编辑 checkbox」会有四种组合，其中两种是废的。
 */
function roleSelectHtml(u, id) {
  const cur = roleOf(u);
  const self = state.me && state.me.id != null && String(u.id) === String(state.me.id);
  const opt = (v, label) =>
    '<option value="' + v + '"' + (cur === v ? ' selected' : '') + '>' + esc(label) + '</option>';
  return '<label class="field"><span class="field-k">角色</span>' +
    '<select id="' + id + '"' + (self ? ' disabled' : '') + '>' +
      opt('user', '普通用户（只能评论，进不了后台）') +
      opt('editor', '编辑（只能写 / 发布自己的文章）') +
      opt('admin', '管理员（全部权限）') +
    '</select>' +
    (self
      ? '<span class="px" style="color:var(--muted);font-size:12px">不能修改自己的角色 —— 免得把自己锁在后台外面</span>'
      : '') +
    '</label>';
}

/** 新建用户：体量上跟「编辑用户」不是一回事，单独一个弹窗 */
function newUser() {
  modal('新建用户',
    '<label class="field"><span class="field-k">昵称（会显示在文章署名上）</span><input id="nuName" autocomplete="off" placeholder="如：小美"></label>' +
    '<label class="field"><span class="field-k">登录账号（邮箱或用户名都行）</span><input id="nuMail" autocomplete="off" placeholder="登录时填这个"></label>' +
    '<label class="field"><span class="field-k">密码</span><input id="nuPw" type="password" autocomplete="new-password" placeholder="给 TA 一个初始密码"></label>' +
    roleSelectHtml({ role: 'editor' }, 'nuRole') +
    '<label class="field"><span class="field-k">头衔徽章（可选）</span><input id="nuTitle" autocomplete="off" placeholder="如：专栏作者"></label>' +
    '<div class="alert" style="margin-bottom:0">编辑角色登录后只会看到「文章编辑」，列表里只有自己写的文章，' +
      '发布时也只提交自己名下那几篇。</div>' +
    '<button class="btn primary block" id="nuSave" style="margin-top:16px"><span>创建</span></button>');

  $('#nuSave').onclick = async () => {
    const body = {
      name: $('#nuName').value.trim(),
      email: $('#nuMail').value.trim(),
      password: $('#nuPw').value,
      role: $('#nuRole').value,
      title_name: $('#nuTitle').value.trim(),
    };
    if (!body.name || !body.email) { toast('✕ 昵称和登录账号都要填', true); return; }
    if (!body.password) { toast('✕ 要设一个初始密码，否则 TA 登不进来', true); return; }
    const b = $('#nuSave'); b.dataset.busy = '1';
    try {
      await api('/users', { method: 'POST', body: body });
      closeModal(); toast('✓ 已创建');
      await loadUsers();
    } catch (e) { toast('✕ ' + e.message, true); delete b.dataset.busy; }
  };
}

function editUser(id) {
  (function () {
    const u = (state.u.rows || []).filter((x) => x.id === id)[0];
    if (!u) { toast('用户不存在，请刷新列表', true); return; }
    modal('编辑用户 #' + id,
      '<label class="field"><span class="field-k">昵称</span><input id="euName" value="' + esc(u.name) + '"></label>' +
      '<label class="field"><span class="field-k">邮箱</span><input id="euMail" value="' + esc(u.email) + '"></label>' +
      '<label class="field"><span class="field-k">主页链接</span><input id="euLink" value="' + esc(u.link || '') + '"></label>' +
      '<div style="display:flex;gap:14px">' +
        '<label class="field" style="flex:1"><span class="field-k">徽章文字</span><input id="euBn" value="' + esc(u.badge_name || '') + '" placeholder="如：博主"></label>' +
        '<label class="field" style="width:130px"><span class="field-k">徽章颜色</span><input id="euBc" value="' + esc(u.badge_color || '') + '" placeholder="#0f8"></label>' +
      '</div>' +
      '<label class="field"><span class="field-k">头衔徽章（金色，显示在系统徽章后、友链/友圈/官职前）</span><input id="euTitle" value="' + esc(u.title_name || '') + '" placeholder="如：荣誉站长 / 合作伙伴"></label>' +
      '<label class="field"><span class="field-k">重设密码（留空不变）</span><input id="euPw" type="password" placeholder="••••••••"></label>' +
      roleSelectHtml(u, 'euRole') +
      '<button class="btn primary block" id="euSave"><span>保存</span></button>');

    $('#euSave').onclick = async () => {
      const body = {
        name: $('#euName').value.trim(),
        email: $('#euMail').value.trim(),
        link: $('#euLink').value.trim(),
        badge_name: $('#euBn').value.trim(),
        badge_color: $('#euBc').value.trim(),
        title_name: $('#euTitle').value.trim(),
        role: $('#euRole').value,
      };
      const pw = $('#euPw').value;
      if (pw) body.password = pw;
      const b = $('#euSave'); b.dataset.busy = '1';
      try {
        await api('/users/' + id, { method: 'PUT', body: body });
        closeModal(); toast('✓ 已保存');
        loadUsers();
      } catch (e) { toast('✕ ' + e.message, true); delete b.dataset.busy; }
    };
  })();
}

// ============================================================ 视图：设置
//
// 表单化：schema 由后端 /settings/form 下发（唯一事实源在 src/lib/settings-form.ts），
// 前端只负责画表单和收值，完全不拼 YAML。schema 之外的键放在 extra 里原样传回，
// 保证「表单化」永远不会静默丢配置。需要手改 YAML 时展开底部「高级」区。

async function viewSettings() {
  const [sites, form] = await Promise.all([api('/sites'), api('/settings/form')]);
  state.sites = sites || [];
  state.sf = {
    schema: form.schema || [],
    values: form.values || {},
    extra: form.extra || {},
    custom: !!form.custom,
    advTouched: false,
  };
  if (state.tab !== 'settings') return;

  const siteRows = state.sites.map((s) =>
    '<div class="mini-i">' +
      '<span class="b"><span class="nm">' + esc(s.name) + '</span> ' +
        '<span class="tx">' + esc((s.urls || []).join(', ')) + '</span></span>' +
      '<span class="c"><button class="btn tiny" data-act="s-edit" data-id="' + s.id + '">编辑</button></span>' +
    '</div>').join('') || '<div class="empty">暂无站点</div>';

  const groups = state.sf.schema.map((g) => {
    const fields = g.fields.map(sfField).join('');
    return '<section class="card" style="margin-top:14px">' +
      '<header class="card-head"><h3>' + esc(g.title) + '</h3>' +
        (g.desc ? '<span class="po-hint">' + esc(g.desc) + '</span>' : '') + '</header>' +
      '<div class="card-body"><div class="sf-grid">' + fields + '</div></div></section>';
  }).join('');

  $('#view').innerHTML =
    head('设置', 'SETTINGS', '站点与前台配置 · 改完点右上角保存',
      '<button class="btn primary tiny" data-act="sf-save">保存配置</button>') +
    '<section class="card"><header class="card-head"><h3>站点</h3></header>' +
      '<div class="card-body"><div class="mini">' + siteRows + '</div></div></section>' +
    groups +
    '<details class="sf-adv" id="sfAdv" style="margin-top:14px">' +
      '<summary>高级：直接编辑原始 YAML（动了这个就以它为准，表单不再参与保存）</summary>' +
      '<div id="sfAdvBox" style="margin-top:10px"><div class="loading">展开时加载…</div></div>' +
    '</details>';

  const adv = $('#sfAdv');
  adv.addEventListener('toggle', async () => {
    const box = $('#sfAdvBox');
    if (!adv.open || !box || box.dataset.loaded) return;
    try {
      const d = await api('/settings');
      box.innerHTML = '<textarea id="sfYaml" class="code" spellcheck="false" style="min-height:320px"></textarea>' +
        '<p style="margin:10px 0 0;font-size:12px;color:var(--muted)">这是服务端实际保存的完整配置。' +
        '保存后仍会按同一套规则回填（frontend.* / captcha / human_check / moderator / ip_region / site_default）。</p>';
      $('#sfYaml').value = d.yaml || '';
      $('#sfYaml').addEventListener('input', () => { state.sf.advTouched = true; });
      box.dataset.loaded = '1';
    } catch (e) {
      box.innerHTML = '<div class="empty">读取失败：' + esc(e.message) + '</div>';
    }
  });
}

/** 单个表单控件（bool=开关行，select/number/text=标准输入） */
function sfField(f) {
  const t = f.type || 'text';
  const v = state.sf.values[f.path];
  const id = 'sf-' + f.path.replace(/[^A-Za-z0-9]/g, '_');

  if (t === 'bool') {
    return '<div class="sf-item"><label class="po-ck sf-ck">' +
      '<input type="checkbox" data-sf="' + esc(f.path) + '" id="' + id + '" style="width:auto"' + (v === true ? ' checked' : '') + '>' +
      '<span>' + esc(f.label) + (f.hint ? ' <em class="sf-em">' + esc(f.hint) + '</em>' : '') + '</span></label></div>';
  }

  let ctl;
  if (t === 'select') {
    ctl = '<select data-sf="' + esc(f.path) + '" id="' + id + '">' +
      (f.options || []).map((o) =>
        '<option value="' + esc(o.v) + '"' + (String(v == null ? '' : v) === o.v ? ' selected' : '') + '>' + esc(o.t) + '</option>',
      ).join('') + '</select>';
  } else if (t === 'number') {
    ctl = '<input data-sf="' + esc(f.path) + '" id="' + id + '" type="number" step="1" value="' + esc(v == null ? '' : v) + '">';
  } else {
    ctl = '<input data-sf="' + esc(f.path) + '" id="' + id + '" value="' + esc(v == null ? '' : v) + '" autocomplete="off" spellcheck="false">';
  }
  return '<div class="sf-item"><label class="field" style="margin-bottom:0">' +
    '<span class="field-k">' + esc(f.label) + '</span>' + ctl +
    (f.hint ? '<span class="sf-hint">' + esc(f.hint) + '</span>' : '') +
  '</label></div>';
}

/** 表单 → 扁平的 { path: value }（类型按 schema 归位） */
function sfCollect() {
  const out = {};
  for (const g of state.sf.schema) {
    for (const f of g.fields) {
      const el = document.getElementById('sf-' + f.path.replace(/[^A-Za-z0-9]/g, '_'));
      if (!el) continue;
      if ((f.type || 'text') === 'bool') out[f.path] = el.checked;
      else if ((f.type || 'text') === 'number') out[f.path] = el.value.trim() === '' ? '' : Number(el.value);
      else out[f.path] = el.value;
    }
  }
  return out;
}

async function saveSettings() {
  const b = $('[data-act="sf-save"]');
  if (b) b.dataset.busy = '1';
  try {
    const adv = $('#sfYaml');
    if (adv && state.sf.advTouched) {
      await api('/settings', { method: 'PUT', body: { yaml: adv.value } });
      toast('✓ 已保存（按原始 YAML）');
    } else {
      await api('/settings/form', { method: 'PUT', body: { values: sfCollect(), extra: state.sf.extra } });
      toast('✓ 已保存');
    }
    await viewSettings();
  } catch (e) {
    toast('✕ ' + e.message, true);
    const b2 = $('[data-act="sf-save"]');
    if (b2) delete b2.dataset.busy;
  }
}


function editSite(id) {
  const s = state.sites.filter((x) => x.id === id)[0];
  if (!s) return;
  modal('编辑站点 #' + id,
    '<label class="field"><span class="field-k">站点名</span><input id="esName" value="' + esc(s.name) + '"></label>' +
    '<label class="field"><span class="field-k">站点地址（多个用换行分隔）</span>' +
      '<textarea id="esUrls" style="min-height:80px">' + esc((s.urls || []).join('\n')) + '</textarea></label>' +
    '<p style="font-size:12px;color:var(--muted);margin-top:0">改站点名会让前台 <code>site</code> 与数据对不上，除非你同步改博客配置。</p>' +
    '<button class="btn primary block" id="esSave"><span>保存</span></button>');

  $('#esSave').onclick = async () => {
    const b = $('#esSave'); b.dataset.busy = '1';
    try {
      await api('/sites/' + id, {
        method: 'PUT',
        body: { name: $('#esName').value.trim(), urls: $('#esUrls').value.split('\n').map((x) => x.trim()).filter(Boolean).join(',') },
      });
      closeModal(); toast('✓ 已保存');
      go('settings');
    } catch (e) { toast('✕ ' + e.message, true); delete b.dataset.busy; }
  };
}

// ============================================================ 视图：状态

async function viewStatus() {
  const h = await api('/healthz');
  let v = {};
  try { v = await api('/version'); } catch (e) {}

  const okDd = (x) => '<dd class="' + (x ? 'ok' : 'bad') + '">' + (x ? 'OK' : 'FAIL') + '</dd>';

  if (state.tab !== 'status') return;
  $('#view').innerHTML =
    head('系统状态', 'STATUS', '运行时自检') +
    '<div class="grid2">' +
      '<section class="card"><header class="card-head"><h3>服务端自检</h3></header><div class="card-body"><dl class="kv">' +
        '<dt>D1 数据库</dt>' + okDd(h.db === 'up') +
        '<dt>评论总数</dt><dd>' + nfmt(h.comments) + '</dd>' +
        '<dt>查询延迟</dt><dd>' + esc(h.latency_ms) + ' ms</dd>' +
        '<dt>API 版本</dt><dd>' + esc(h.version) + '</dd>' +
        '</dl></div></section>' +
      '<section class="card"><header class="card-head"><h3>运行时</h3></header><div class="card-body"><dl class="kv">' +
        '<dt>应用</dt><dd>' + esc(v.app || 'artalk') + '</dd>' +
        '<dt>版本</dt><dd>' + esc(v.version || '—') + '</dd>' +
        '<dt>提交</dt><dd>' + esc(v.commit_hash || '—') + '</dd>' +
        '<dt>端点</dt><dd>' + esc(location.origin) + '</dd>' +
        '<dt>登录身份</dt><dd>' + esc((state.me && (state.me.name || state.me.email)) || '—') + '</dd>' +
        '</dl></div></section>' +
    '</div>' +
    '<section class="card" style="margin-top:14px"><header class="card-head"><h3>注意事项</h3></header><div class="card-body">' +
      '<dl class="kv">' +
        '<dt>邮件通知</dt><dd class="' + (h.mail === 'on' ? 'ok' : 'bad') + '">' +
          (h.mail === 'on' ? '已启用（Resend）' : '未配置 —— 需写入 RESEND_API_KEY') + '</dd>' +
        '<dt>验证码登录</dt><dd class="bad">不可用 —— Workers 无 TCP，发不了 SMTP</dd>' +
        '<dt>官方后台</dt><dd>可用 —— <a href="./../sidebar/" target="_blank" rel="noopener">' + esc(location.origin) + '/sidebar/</a></dd>' +
        '<dt>慢查询</dt><dd>跨境访问有 RTT 开销，评论列表为动态接口无法走 CDN 缓存</dd>' +
      '</dl></div></section>';
}

// ============================================================ 视图：订阅源
// 数据来自 rss-robot-cf（api.200181.xyz）

async function viewFeeds() {
  if (state.tab !== 'feeds') return;
  $('#view').innerHTML =
    head('订阅源管理', 'FEEDS', 'RSS 订阅源 · ' + RSS_API, '<button class="btn tiny" data-act="f-reload">刷新</button>');

  let data;
  try {
    data = await rssApi('/api/feeds');
  } catch (e) {
    if (e.status === 401 || e.status === 403) {
      $('#view').innerHTML = head('订阅源管理', 'FEEDS', '未授权') +
        '<div class="empty">登录状态已失效 —— 请退出后重新登录后台。</div>';
      return;
    }
    $('#view').innerHTML += '<div class="empty">加载失败：' + esc(e.message) + '</div>';
    return;
  }

  const feeds = data.feeds || [];
  state.feedsRows = feeds; // 编辑弹窗取数用
  const rows = feeds.map((f) =>
    '<div class="mini-i">' +
      '<span class="b"><span class="nm">' + esc(f.feedTitle || f.url) + '</span> ' +
        '<span class="tx">' + esc(f.url) + '</span></span>' +
      '<span class="c">' +
        '<button class="btn tiny" data-act="f-edit" data-url="' + esc(f.url) + '">编辑</button>' +
        '<button class="btn tiny" data-act="f-del" data-url="' + esc(f.url) + '">删除</button>' +
      '</span>' +
    '</div>').join('') || '<div class="empty">暂无订阅源</div>';

  $('#view').innerHTML +=
    '<section class="card"><header class="card-head"><h3>订阅源（' + feeds.length + '）</h3>' +
      '<button class="btn tiny" data-act="f-add">添加</button></header>' +
    '<div class="card-body"><div class="mini">' + rows + '</div></div></section>';
}

function addFeed() {
  modal('添加订阅源',
    '<label class="field"><span class="field-k">订阅地址</span><input id="fUrl" placeholder="https://example.com/feed"></label>' +
    '<label class="field"><span class="field-k">名称（可选）</span><input id="fTitle" placeholder="博客名称"></label>' +
    '<button class="btn primary block" id="fSave"><span>添加</span></button>');
  $('#fSave').onclick = async () => {
    const b = $('#fSave'); b.dataset.busy = '1';
    try {
      await rssApi('/api/feeds', { method: 'POST', body: { url: $('#fUrl').value.trim(), feedTitle: $('#fTitle').value.trim() } });
      closeModal(); toast('✓ 已添加'); viewFeeds();
    } catch (e) { toast('✕ ' + e.message, true); delete b.dataset.busy; }
  };
}

function editFeed(url) {
  const f = (state.feedsRows || []).filter((x) => x.url === url)[0];
  if (!f) { toast('订阅源不存在，请刷新', true); return; }
  modal('编辑订阅源',
    '<label class="field"><span class="field-k">订阅地址</span><input id="feUrl" value="' + esc(f.url) + '"></label>' +
    '<label class="field"><span class="field-k">名称</span><input id="feTitle" value="' + esc(f.feedTitle || '') + '"></label>' +
    '<p style="margin:-6px 0 14px;font-size:11px;color:var(--muted)">改地址不会丢抓取记录 —— 服务端按原地址定位后更新。</p>' +
    '<button class="btn primary block" id="feSave"><span>保存</span></button>');
  $('#feSave').onclick = async () => {
    const b = $('#feSave'); b.dataset.busy = '1';
    try {
      await rssApi('/api/feeds', {
        method: 'POST',
        body: { url: $('#feUrl').value.trim(), feedTitle: $('#feTitle').value.trim(), oldUrl: f.url },
      });
      closeModal(); toast('✓ 已保存'); viewFeeds();
    } catch (e) { toast('✕ ' + e.message, true); delete b.dataset.busy; }
  };
}

// ============================================================ 视图：友链

async function viewLinks() {
  if (state.tab !== 'links') return;
  $('#view').innerHTML =
    head('友链管理', 'LINKS', '友链 · ' + RSS_API, '<button class="btn tiny" data-act="l-reload">刷新</button>');

  let data;
  let apps = [];
  try {
    data = await rssApi('/api/links?all=1');
    try {
      const ad = await rssApi('/api/link-apply/list');
      apps = (ad.apps || []).filter((a) => a.status === 'pending');
    } catch (e) { /* 申请列表加载失败不阻塞友链展示 */ }
  } catch (e) {
    if (e.status === 401 || e.status === 403) {
      $('#view').innerHTML = head('友链管理', 'LINKS', '未授权') +
        '<div class="empty">登录状态已失效 —— 请退出后重新登录后台。</div>';
      return;
    }
    $('#view').innerHTML += '<div class="empty">加载失败：' + esc(e.message) + '</div>';
    return;
  }

  state.linkApps = apps;

  // 待审申请卡片
  let appHtml = '';
  if (apps.length) {
    const appRows = apps.map((a) =>
      '<div class="mini-i">' +
        '<span class="b"><span class="nm">' + esc(a.name) + '</span> ' +
          '<span class="tx">' + esc(a.url) + (a.feed ? ' · RSS' : '') + (a.email ? ' · ' + esc(a.email) : '') + '</span>' +
          (a.description ? '<span class="tx">' + esc(a.description) + '</span>' : '') +
        '</span>' +
        '<span class="c">' +
          '<button class="btn tiny" data-act="l-ap-view" data-id="' + esc(a.id) + '">查看</button>' +
          '<button class="btn tiny" data-act="l-ap-approve" data-id="' + esc(a.id) + '">通过</button>' +
          '<button class="btn tiny" data-act="l-ap-reject" data-id="' + esc(a.id) + '">拒绝</button>' +
          '<button class="btn tiny danger" data-act="l-ap-del" data-id="' + esc(a.id) + '">删除</button>' +
        '</span>' +
      '</div>').join('');
    appHtml =
      '<section class="card"><header class="card-head"><h3>待审申请（' + apps.length + '）</h3>' +
        '<span class="tag warn">新</span></header>' +
      '<div class="card-body"><div class="mini">' + appRows + '</div></div></section>';
  }

  const links = data.links || [];
  state.linksRows = links;
  const rows = links.map((l) =>
    '<div class="mini-i">' +
      '<span class="b"><span class="nm">' + esc(l.name || l.url) + (l.hidden ? ' <span class="tag pink">隐藏</span>' : '') + '</span> ' +
        '<span class="tx">' + esc(l.url) + (l.rss ? ' · RSS' : '') + '</span></span>' +
      '<span class="c">' +
        '<button class="btn tiny" data-act="l-edit" data-url="' + esc(l.url) + '">编辑</button>' +
        '<button class="btn tiny" data-act="l-del" data-url="' + esc(l.url) + '">删除</button>' +
      '</span>' +
    '</div>').join('') || '<div class="empty">暂无友链</div>';

  $('#view').innerHTML += appHtml +
    '<section class="card"><header class="card-head"><h3>友链（' + links.length + '）</h3>' +
      '<button class="btn tiny" data-act="l-add">添加</button></header>' +
    '<div class="card-body"><div class="mini">' + rows + '</div></div></section>';
}

function viewLinkApply(id) {
  const a = (state.linkApps || []).find((x) => x.id === id);
  if (!a) return toast('✕ 申请不存在', true);
  modal('友链申请 · ' + a.name,
    '<div class="kv" style="font-size:13px;line-height:2">' +
      '<div><b>名称：</b>' + esc(a.name) + '</div>' +
      '<div><b>链接：</b><a href="' + esc(a.url) + '" target="_blank" rel="noopener">' + esc(a.url) + '</a></div>' +
      '<div><b>订阅：</b>' + esc(a.feed || '—') + '</div>' +
      '<div><b>邮箱：</b>' + esc(a.email) + '</div>' +
      (a.description ? '<div><b>描述：</b>' + esc(a.description) + '</div>' : '') +
      '<div><b>申请时间：</b>' + esc(a.appliedAt) + '</div>' +
    '</div>' +
    '<label class="field"><span class="field-k">反馈意见（拒绝时建议填写，将邮件告知申请人）</span>' +
      '<textarea id="laFeedback" rows="2"></textarea></label>' +
    '<div style="display:flex;gap:8px;margin-top:10px">' +
      '<button class="btn primary" style="flex:1" id="laApprove">通过并加为友链</button>' +
      '<button class="btn danger" style="flex:1" id="laReject">拒绝</button>' +
    '</div>');
  $('#laApprove').onclick = async () => {
    try {
      await rssApi('/api/link-apply/review', { method: 'POST', body: { id, action: 'approve', feedback: $('#laFeedback').value.trim() } });
      closeModal(); toast('✓ 已通过并邮件通知申请人'); viewLinks();
    } catch (e) { toast('✕ ' + e.message, true); }
  };
  $('#laReject').onclick = async () => {
    try {
      await rssApi('/api/link-apply/review', { method: 'POST', body: { id, action: 'reject', feedback: $('#laFeedback').value.trim() } });
      closeModal(); toast('✓ 已拒绝并邮件告知申请人'); viewLinks();
    } catch (e) { toast('✕ ' + e.message, true); }
  };
}

function addLink() {
  modal('添加友链',
    '<label class="field"><span class="field-k">名称</span><input id="lName" placeholder="站点名称"></label>' +
    '<label class="field"><span class="field-k">地址</span><input id="lUrl" placeholder="https://example.com"></label>' +
    '<label class="field"><span class="field-k">描述（可选）</span><input id="lDesc" placeholder="一句话描述"></label>' +
    '<button class="btn primary block" id="lSave"><span>添加</span></button>');
  $('#lSave').onclick = async () => {
    const b = $('#lSave'); b.dataset.busy = '1';
    try {
      await rssApi('/api/links', { method: 'POST', body: { name: $('#lName').value.trim(), url: $('#lUrl').value.trim(), description: $('#lDesc').value.trim() } });
      closeModal(); toast('✓ 已添加'); viewLinks();
    } catch (e) { toast('✕ ' + e.message, true); delete b.dataset.busy; }
  };
}

function editLink(url) {
  const l = (state.linksRows || []).filter((x) => x.url === url)[0];
  if (!l) { toast('友链不存在，请刷新', true); return; }
  modal('编辑友链',
    '<label class="field"><span class="field-k">名称</span><input id="leName" value="' + esc(l.name || '') + '"></label>' +
    '<label class="field"><span class="field-k">地址</span><input id="leUrl" value="' + esc(l.url) + '"></label>' +
    '<label class="field"><span class="field-k">描述</span><input id="leDesc" value="' + esc(l.description || '') + '"></label>' +
    '<label class="field"><span class="field-k">RSS 地址（可选）</span><input id="leRss" value="' + esc(l.rss || '') + '"></label>' +
    '<label style="display:flex;align-items:center;gap:8px;margin-bottom:18px">' +
      '<input type="checkbox" id="leHidden"' + (l.hidden ? ' checked' : '') + ' style="width:auto">' +
      '<span class="px" style="color:var(--muted)">隐藏（不在前台展示，保留数据）</span></label>' +
    '<button class="btn primary block" id="leSave"><span>保存</span></button>');
  $('#leSave').onclick = async () => {
    const b = $('#leSave'); b.dataset.busy = '1';
    try {
      await rssApi('/api/links', {
        method: 'POST',
        body: {
          name: $('#leName').value.trim(),
          url: $('#leUrl').value.trim(),
          description: $('#leDesc').value.trim(),
          rss: $('#leRss').value.trim(),
          hidden: $('#leHidden').checked,
          oldUrl: l.url,
        },
      });
      closeModal(); toast('✓ 已保存'); viewLinks();
    } catch (e) { toast('✕ ' + e.message, true); delete b.dataset.busy; }
  };
}

// ============================================================ 视图：文章编辑
//
// 全线走 Worker 的 /editor/* 反代：浏览器只跟 Worker 说话，编辑器令牌在 Worker 侧
// 注入，所以前端不需要任何额外凭据（复用后台已有的登录会话即可）。
//
// ★ 定位键用 id（content 下的目录名，全仓唯一），**不是 slug** ——
//   仓库里有 5 组 slug 撞名的文章，按 slug 打开会静默地打开/保存到另一篇文件上。
//
// ★ 交互形态对齐 write-server（用户用惯的那套）：
//   · 列表 = 卡片行：标题可点 + 草稿/已发布徽章，hover 出 预览/编辑/删除
//   · 新建 = 直接进编辑器（不再弹窗），输入标题时自动生成时间戳 slug
//   · 编辑器 = 紧凑表单（标题+slug 一行、日期+作者+布局+分类一行、标签一行）
//     + 正文 + 右上角 保存 / 发布

/** 界面上可编辑的 front matter 字段（其余键一律只读展示、原样保留） */
const PO_FM_FIELDS = [
  { k: 'title', label: '标题' },
  { k: 'slug', label: 'slug（决定网址 /<slug>.html）' },
  { k: 'date', label: '日期' },
  { k: 'author', label: '作者' },
  { k: 'layout', label: '布局' },
  { k: 'description', label: '摘要' },
];
const PO_KNOWN = new Set([...PO_FM_FIELDS.map((f) => f.k), 'categories', 'tags', 'draft']);

const arrText = (v) => (Array.isArray(v) ? v.join(', ') : v == null ? '' : String(v));
const textArr = (s) => String(s || '').split(/[,，]/).map((x) => x.trim()).filter(Boolean);

/**
 * 新文章的默认 slug：YYYYMMDDHHMMSS（本地时间 14 位）。
 * 与 write-server 的 makeSlug（src/lib/bot/helpers.ts）一字不差 ——
 * 仓库里 2026-06-22 之后的文章全是这个风格，不要用标题当 slug。
 */
function makeSlug(d = new Date()) {
  const p = (n) => String(n).padStart(2, '0');
  return (
    d.getFullYear() + p(d.getMonth() + 1) + p(d.getDate()) +
    p(d.getHours()) + p(d.getMinutes()) + p(d.getSeconds())
  );
}

/** 目录名里的标题段（与 write-server 的 computeDirPath 同一套规则） */
function titlePartOf(t) {
  return (
    String(t || '')
      .replace(/[^\w一-鿿㐀-䶿]+/g, '-')
      .replace(/^-+|-+$/g, '')
      .toLowerCase() || 'post'
  );
}

const poFmtDate = (d) => (d ? String(d).slice(0, 10).replace(/-/g, '/') : '—');

async function viewPosts() {
  if (state.tab !== 'posts') return;
  if (state.ed) return renderEditor();
  await loadPosts();
}

async function loadPosts() {
  const po = state.po;
  let d;
  try {
    d = await api('/editor/posts?' + qs({ q: po.q, page: po.page, perPage: po.perPage }));
  } catch (e) {
    if (state.tab !== 'posts') return;
    $('#view').innerHTML = head('文章编辑', '', '') +
      '<div class="empty"><b>加载不了文章列表</b>' + esc(e.message) + '</div>';
    return;
  }
  po.rows = d.posts || [];
  po.total = d.total || 0;
  po.totalPages = d.totalPages || 1;
  po.page = d.page || 1;
  if (state.tab !== 'posts' || state.ed) return;
  renderPostList();
}

function renderPostList() {
  const po = state.po;
  const rows = po.rows.map((r) => {
    const badges = [
      r.draft ? '<span class="tag warn">草稿</span>' : '<span class="tag ok">已发布</span>',
      r.slugConflict
        ? '<span class="tag dang" title="slug 与另一篇文章重复：Hugo 用 /:slug，撞名时线上会有一篇被覆盖">URL 冲突</span>'
        : '',
      r.parseable === false
        ? '<span class="tag dang" title="front matter 有解析不了的内容：打开后只能改正文，字段保持原样">FM 异常</span>'
        : '',
    ].filter(Boolean).join(' ');
    const meta = [poFmtDate(r.date), (r.categories || []).join('、')].filter(Boolean).join(' · ');
    return '<div class="po-row">' +
      '<div class="po-main">' +
        '<div class="po-line">' +
          '<span class="po-t" data-act="po-open" data-id="' + esc(r.id) + '" title="' + esc(r.id) + '">' + esc(r.title) + '</span>' +
          badges +
        '</div>' +
        '<div class="po-sub">' + esc(meta) + '</div>' +
      '</div>' +
      '<div class="po-acts">' +
        (r.url ? '<a class="po-ic" href="' + esc(r.url) + '" target="_blank" rel="noopener" title="预览线上页面">' + ICONS.eye + '</a>' : '') +
        '<button class="po-ic" type="button" data-act="po-open" data-id="' + esc(r.id) + '" title="编辑">' + ICONS.edit + '</button>' +
        '<button class="po-ic danger" type="button" data-act="po-del" data-id="' + esc(r.id) + '" data-title="' + esc(r.title) + '" title="删除">' + ICONS.trash + '</button>' +
      '</div>' +
    '</div>';
  }).join('');

  $('#view').innerHTML =
    head('文章编辑', '', '共 ' + nfmt(po.total) + ' 篇 · 直接改仓库 content/posts 下的 Markdown',
      '<button class="btn tiny" data-act="po-git">发布 / 同步</button>' +
      '<button class="btn primary tiny" data-act="po-new">＋ 新建</button>') +
    '<div class="ctool"><div class="grow">' +
      '<input id="poq" type="search" placeholder="搜索标题、slug、分类、标签、作者…" value="' + esc(po.q) + '">' +
    '</div></div>' +
    (po.rows.length
      ? '<div class="po-list">' + rows + '</div>' + pagerPo()
      : '<div class="empty"><b>' + (po.q ? '没有匹配的文章' : '还没有文章') + '</b>' +
        (po.q ? '换个关键词试试' : '点右上角「＋ 新建」写第一篇') + '</div>');

  const q = $('#poq');
  let tmr = null;
  q.oninput = () => {
    clearTimeout(tmr);
    tmr = setTimeout(() => { po.q = q.value.trim(); po.page = 1; loadPosts(); }, 420);
  };
}

function pagerPo() {
  const po = state.po;
  return '<div class="pager">' +
    '<button class="btn tiny" data-act="po-prev"' + (po.page <= 1 ? ' disabled' : '') + '>‹ 上一页</button>' +
    '<span class="info">第 <b>' + po.page + '</b> / ' + po.totalPages + ' 页 · 共 <b>' + nfmt(po.total) + '</b> 篇</span>' +
    '<button class="btn tiny" data-act="po-next"' + (po.page >= po.totalPages ? ' disabled' : '') + '>下一页 ›</button>' +
  '</div>';
}

async function openPost(id) {
  $('#view').innerHTML = '<div class="loading">加载中…</div>';
  let post;
  try {
    post = await api('/editor/posts/' + encodeURIComponent(id));
  } catch (e) {
    if (state.tab !== 'posts') return;
    $('#view').innerHTML = head('打开失败', '', esc(id)) +
      '<div class="empty"><b>' + esc(e.message) + '</b>' +
        '<p class="po-note" style="margin-top:10px">文章还在服务器上没动过，直接重试即可；连续失败多半是本机到 Cloudflare 这一跳不稳。</p>' +
      '</div>' +
      '<div style="margin-top:14px">' +
        '<button class="btn primary" data-act="po-open" data-id="' + esc(id) + '">重试</button> ' +
        '<button class="btn" data-act="po-back">返回列表</button>' +
      '</div>';
    return;
  }
  state.ed = {
    id: post.id,
    post,
    dirty: false,
    uploading: 0,
  };
  renderEditor();
}

/** 新建：直接进编辑器（对齐 write-server 的「撰写文章」页），第一次保存时才真正创建 */
function newPost() {
  state.ed = {
    isNew: true,
    id: '',
    slugTouched: false,
    post: {
      id: '',
      title: '',
      slug: '',
      date: new Date().toISOString().slice(0, 10),
      author: '',
      layout: 'post',
      categories: [],
      tags: [],
      draft: true,
      url: '',
      filePath: '',
      eol: '\n',
      bodyLead: '',
      frontMatter: {},
      frontMatterRaw: null,
      frontMatterError: null,
      content: '',
    },
    dirty: false,
    uploading: 0,
  };
  renderEditor();
}

function renderEditor() {
  const ed = state.ed;
  if (!ed) { loadPosts(); return; }
  const p = ed.post;
  const orig = p.frontMatter || {};
  const fmBroken = !ed.isNew && (!p.frontMatter || !!p.frontMatterError);

  // 编辑角色：作者字段只读。后端本来就不采纳它传的 author/author_id
  // （见 editor-api/src/posts.mjs），这里显示自己的名字只是为了别让人白填。
  const roAuthor = isEditor();
  const field = (k, label, cls, ph, readonly) => {
    let v = orig[k] == null ? '' : orig[k];
    if (readonly && !v) v = (state.me && state.me.name) || '';
    return '<label class="field ' + (cls || '') + '"><span class="field-k">' + esc(label) + '</span>' +
      '<input data-fm="' + k + '" autocomplete="off" spellcheck="false" placeholder="' + esc(ph || '') + '"' +
      (readonly ? ' readonly title="编辑角色只能署自己的名字"' : '') +
      ' value="' + esc(v) + '"></label>';
  };

  const metaForm =
    '<div class="po-frow">' +
      field('title', '标题', 'po-f-title', '文章标题') +
      field('slug', 'Slug（自动生成）', 'po-f-slug', 'YYYYMMDDHHMMSS') +
    '</div>' +
    '<div class="po-frow4">' +
      field('date', '日期', 'po-f-date') +
      field('author', '作者', 'po-f-author', '', roAuthor) +
      field('layout', '布局', 'po-f-layout') +
      '<label class="field po-f-cats"><span class="field-k">分类（逗号分隔）</span>' +
        '<input id="poCats" autocomplete="off" value="' + esc(arrText(orig.categories)) + '"></label>' +
    '</div>' +
    '<label class="field"><span class="field-k">标签（逗号分隔）</span>' +
      '<input id="poTags" autocomplete="off" value="' + esc(arrText(orig.tags)) + '"></label>' +
    field('description', '摘要（可选）') +
    '<div class="po-folder" id="poFolder"></div>';

  const extraKeys = Object.keys(orig).filter((k) => !PO_KNOWN.has(k));
  const extra = extraKeys.length
    ? '<div class="po-ro"><span class="po-ro-k">其他字段（只读保留，不会被动过）</span>' +
      extraKeys.map((k) => {
        const v = orig[k];
        const t = Array.isArray(v) ? '列表' : v === null ? '空' : typeof v;
        const s = Array.isArray(v) ? v.join(', ') : String(v == null ? '' : v);
        return '<div class="po-ro-i"><code>' + esc(k) + '</code><span class="t">' + esc(t) + '</span>' +
          '<span class="v">' + esc(truncate(s.replace(/\s+/g, ' '), 70)) + '</span></div>';
      }).join('') + '</div>'
    : '';

  const warn = [
    p.slugConflict
      ? '<div class="alert">这篇文章的 slug「' + esc(p.slug) + '」与另一篇重复。Hugo 用 /:slug 生成网址，' +
        '撞名时线上只会剩一篇 —— 改 slug 前先确认另一篇要不要一起处理。</div>'
      : '',
    fmBroken
      ? '<div class="alert">front matter 没法完整解析（' + esc(p.frontMatterError || '没有 front matter') + '）。' +
        '为了不写坏这篇，字段区已停用，保存时只会动正文。</div>'
      : '',
  ].filter(Boolean).join('');

  $('#view').innerHTML =
    head(ed.isNew ? '新建文章' : (p.title || ed.id), '', ed.isNew ? '写完点「保存」才真正落盘' : ('正文 ' + String(p.content || '').length + ' 字 · ' + esc(p.id)),
      '<button class="btn tiny" data-act="po-back">← 列表</button>' +
      (ed.isNew ? '' :
        '<button class="btn tiny" data-act="po-reload-post">还原改动</button>' +
        '<button class="btn tiny danger" data-act="po-del">删除</button>')) +
    (!ed.isNew && p.url ? '<div class="po-url">线上地址 <a class="lk" href="' + esc(p.url) + '" target="_blank" rel="noopener">' + esc(p.url) + '</a>' +
      '<span class="po-file" title="实际写入的文件">' + esc(p.filePath) + '</span></div>' : '') +
    warn +
    '<div class="po-grid">' +
      '<div class="po-maincol">' +
        '<section class="card"><header class="card-head"><h3>文章信息</h3></header><div class="card-body">' +
          metaForm + extra +
        '</div></section>' +
        '<section class="card" style="margin-top:14px">' +
          '<header class="card-head"><h3>正文 · MARKDOWN</h3>' +
            '<button class="btn tiny" data-act="po-img" type="button">插入图片</button>' +
            '<input type="file" id="poImgFile" accept="image/*" multiple style="display:none">' +
            '<span class="po-hint">可直接 Ctrl+V 粘贴截图，自动存到文章目录</span></header>' +
          '<div class="card-body">' +
            '<textarea id="poBody" class="po-body" spellcheck="false" placeholder="开始撰写…"></textarea>' +
            '<div class="po-foot">' +
              '<label class="po-ck"><input type="checkbox" id="poDraft" style="width:auto"' + (orig.draft === true ? ' checked' : '') + '><span>草稿（不发布到线上）</span></label>' +
              '<button class="btn tiny" data-act="po-save" type="button">保存</button>' +
              '<button class="btn primary tiny" data-act="po-publish" type="button">发布</button>' +
              '<span id="poStat">尚未修改</span>' +
              '<span class="po-kbd">Ctrl / ⌘ + S 保存</span></div>' +
          '</div></section>' +
      '</div>' +
      '<aside class="po-side">' + shortcutPanelHtml() + '</aside>' +
    '</div>';

  const ta = $('#poBody');
  ta.value = p.content || '';
  if (fmBroken) {
    $$('#view [data-fm], #poCats, #poTags, #poDraft').forEach((el) => { el.disabled = true; });
  }

  // 新建：标题一打字就自动刷新时间戳 slug（用户手动改过 slug 就不再动）
  const updateFolder = () => {
    const box = $('#poFolder');
    if (!box) return;
    const g = (k) => { const el = $('#view [data-fm="' + k + '"]'); return el ? el.value.trim() : ''; };
    const d = g('date') || new Date().toISOString().slice(0, 10);
    const slug = g('slug') || makeSlug();
    box.textContent = '保存位置：content/posts/' + d.slice(0, 4) + '/' + d.slice(0, 10) + '-' +
      (titlePartOf(g('title')) || 'post') + '-' + slug + '/index.md';
  };
  const titleEl = $('#view [data-fm="title"]');
  const slugEl = $('#view [data-fm="slug"]');
  if (ed.isNew && titleEl && slugEl) {
    if (!slugEl.value) slugEl.value = makeSlug();
    slugEl.addEventListener('input', () => { ed.slugTouched = true; updateFolder(); markDirty(); });
    titleEl.addEventListener('input', () => {
      if (!ed.slugTouched) slugEl.value = makeSlug();
      updateFolder();
    });
    updateFolder();
  }

  ta.addEventListener('input', markDirty);
  ta.addEventListener('paste', onPasteImage, true);
  ['poCats', 'poTags', 'poDraft'].forEach((id) => { const el = $('#' + id); if (el) el.addEventListener('input', markDirty); });
  $$('#view [data-fm]').forEach((el) => el.addEventListener('input', markDirty));

  // 快捷插入面板（对齐 write-server 的 ShortcutPanel）
  $('.po-side').addEventListener('click', (e) => {
    const b = e.target.closest('[data-sc]');
    if (!b) return;
    const fn = PO_SHORTCUTS[b.dataset.sc];
    if (fn) { fn(); markDirty(); }
  });

  // 插入图片按钮 → 文件选择器（粘贴截图之外的第二条路）
  const imgBtn = $('[data-act="po-img"]');
  const imgFile = $('#poImgFile');
  if (imgBtn && imgFile) {
    imgBtn.addEventListener('click', () => imgFile.click());
    imgFile.addEventListener('change', async () => {
      for (const f of Array.from(imgFile.files || [])) await insertImage(f);
      imgFile.value = '';
    });
  }
}

/** 选中文字则包裹，没选中则插入「before + 占位 + after」并选中占位（行为照抄 write-server） */
function poWrap(before, after, placeholder) {
  const ta = $('#poBody');
  if (!ta) return;
  const s = ta.selectionStart == null ? ta.value.length : ta.selectionStart;
  const e = ta.selectionEnd == null ? s : ta.selectionEnd;
  const sel = ta.value.slice(s, e) || placeholder;
  ta.value = ta.value.slice(0, s) + before + sel + after + ta.value.slice(e);
  requestAnimationFrame(() => {
    const pos = s + before.length + sel.length + after.length;
    ta.focus();
    ta.setSelectionRange(s + before.length, pos);
  });
}

/** 在光标处整块插入模板（短代码等多行结构） */
function poBlock(tpl) {
  const ta = $('#poBody');
  if (!ta) return;
  const s = ta.selectionStart == null ? ta.value.length : ta.selectionStart;
  ta.value = ta.value.slice(0, s) + tpl + ta.value.slice(s);
  requestAnimationFrame(() => {
    ta.focus();
    ta.setSelectionRange(s + tpl.length, s + tpl.length);
  });
}

/**
 * 快捷插入面板：短代码模板与 write-server 的 ShortcutPanel.tsx 完全一致。
 * 本博客的 Hugo 短代码在 themes/ying/layouts/shortcodes/（bilibili/grid/video 均实装）。
 */
function shortcutPanelHtml() {
  return '<h3 class="po-side-t">快捷插入</h3>' +
    '<div class="po-sc">' +
    Object.keys(PO_SHORTCUTS).map((label) =>
      '<button type="button" class="po-sc-b" data-sc="' + esc(label) + '"><span class="g">' + esc(PO_SHORTCUT_GLYPH[label] || '·') + '</span>' + esc(label) + '</button>'
    ).join('') +
    '</div>' +
    '<div class="po-note"><h4>说明</h4><ul>' +
    '<li>选中文字后点按钮可包裹</li>' +
    '<li>未选中则插入模板 + 占位文字</li>' +
    '<li>视频需替换 src 中的路径</li>' +
    '<li>B站/YouTube 替换 BV号/ID</li>' +
    '</ul></div>';
}

const PO_SHORTCUT_GLYPH = {
  H2: 'H2', H3: 'H3', 粗体: 'B', 代码块: '{}', 行内代码: '`', 引用: '❝',
  图片: '▣', 图片网格: '▦', 本地视频: '▶', B站视频: '▶', YouTube: '▶', 链接: '⧉', 分割线: '—',
};

const PO_SHORTCUTS = {
  H2: () => poWrap('## ', '\n', '二级标题'),
  H3: () => poWrap('### ', '\n', '三级标题'),
  粗体: () => poWrap('**', '**', '粗体文本'),
  代码块: () => poWrap('```\n', '\n```\n', '代码'),
  行内代码: () => poWrap('`', '`', 'code'),
  引用: () => poWrap('> ', '\n', '引用内容'),
  图片: () => poWrap('![', ']()', '描述'),
  图片网格: () => poBlock('{{< grid cols="3" >}}\n![描述]()\n![描述]()\n![描述]()\n{{< /grid >}}\n'),
  本地视频: () => poBlock('{{< video src="/video/example.mp4" caption="视频说明" >}}\n'),
  B站视频: () => poBlock('{{< bilibili BV1xx411c7mD >}}\n'),
  YouTube: () => poBlock('{{< youtube dQw4w9WgXcQ >}}\n'),
  链接: () => poWrap('[', ']()', '链接文本'),
  分割线: () => poBlock('\n---\n'),
};

/** 表单 → 当前值（只在保存时调用） */
function readForm() {
  const fm = {};
  $$('#view [data-fm]').forEach((el) => { fm[el.dataset.fm] = el.value; });
  const d = $('#poDraft');
  if (d) fm.draft = d.checked;
  const c = $('#poCats');
  const t = $('#poTags');
  if (c) fm.categories = textArr(c.value);
  if (t) fm.tags = textArr(t.value);
  return fm;
}

/**
 * 只回传**真正变了的**字段。
 * 这一点很关键：后端是「没动 front matter 就原文照抄」，一旦我们无脑回传全部字段，
 * 那些值相等的字段也会让深比较失败，于是整块 front matter 被重新序列化 ——
 * 引号、块标量写法都会变，白产生一堆 diff。
 */
function fmPatch() {
  const ed = state.ed;
  if (!ed) return {};
  const orig = ed.post.frontMatter;
  if (!orig) return {}; // front matter 解析不了 → 一个字段都不碰
  const now = readForm();
  const out = {};

  for (const f of PO_FM_FIELDS) {
    const k = f.k;
    const has = k in orig;
    const raw = (now[k] == null ? '' : String(now[k])).trim();
    if (!has && raw === '') continue;          // 原本没有、也没填 → 不新增
    const before = orig[k] == null ? '' : String(orig[k]).trim();
    if (raw !== before) out[k] = raw;
  }

  if ((now.draft === true) !== (orig.draft === true)) out.draft = now.draft === true;

  for (const k of ['categories', 'tags']) {
    const a = now[k] || [];
    const b = Array.isArray(orig[k]) ? orig[k] : [];
    if (JSON.stringify(a) !== JSON.stringify(b)) out[k] = a;
  }
  return out;
}

function markDirty() {
  const ed = state.ed;
  if (!ed) return;
  const changed = Object.keys(fmPatch()).length > 0 || ($('#poBody') && $('#poBody').value !== (ed.post.content || ''));
  ed.dirty = changed;
  const s = $('#poStat');
  if (s) s.textContent = changed ? '● 有未保存的改动' : '尚未修改';
}

/** 离开编辑器：有未保存改动就先拦一下，别让人默默丢字 */
function leaveEditor(next) {
  const ed = state.ed;
  if (ed && ed.dirty) {
    confirmBox('有未保存的改动', '正文或字段还没保存，离开就丢了。确定离开？', async () => {
      state.ed = null;
      await next();
    });
    return;
  }
  state.ed = null;
  next();
}

/**
 * 保存当前文章。新建走 POST（第一次保存才落盘），已有走 PUT（只传变更字段）。
 * 返回 true/false 表示成功与否；opts.silent 不弹 toast，opts.noReload 不重新拉取。
 */
async function saveCurrentPost(opts = {}) {
  const ed = state.ed;
  if (!ed) return false;
  const btn = $('[data-act="po-save"]');
  if (btn) btn.dataset.busy = '1';
  try {
    const content = $('#poBody').value;
    if (ed.isNew) {
      const fm = readForm();
      if (!String(fm.title || '').trim()) { toast('✕ 先写个标题再保存', true); return false; }
      if (!String(fm.slug || '').trim()) fm.slug = makeSlug(); // 兜底，正常已被前端预填
      const r = await api('/editor/posts', { method: 'POST', body: { frontMatter: fm, content } });
      toast('✓ 已创建：' + r.id);
      state.ed = null;
      await openPost(r.id);
    } else {
      await api('/editor/posts/' + encodeURIComponent(ed.id), {
        method: 'PUT',
        body: { content, frontMatter: fmPatch() },
      });
      if (!opts.silent) toast('✓ 已保存到文件');
      if (!opts.noReload) await openPost(ed.id); // 以后端磁盘上的内容为准重载，避免界面状态和文件漂移
    }
    return true;
  } catch (e) {
    toast('✕ ' + e.message, true);
    return false;
  } finally {
    const b2 = $('[data-act="po-save"]');
    if (b2) delete b2.dataset.busy;
  }
}

/** 发布 = 先保存，再弹发布确认（commit + push，会触发线上构建） */
async function publishCurrentPost() {
  if (!state.ed) return;
  if (await saveCurrentPost({ silent: true, noReload: true })) openGitModal();
}

/** 粘贴图片 → 传到文章同级目录 → 插入相对路径（仓库现行写法就是裸文件名） */
async function onPasteImage(e) {
  const ed = state.ed;
  if (!ed) return;
  const items = (e.clipboardData && e.clipboardData.items) || [];
  let f = null;
  for (let i = 0; i < items.length; i++) {
    if (items[i].kind === 'file' && String(items[i].type).startsWith('image/')) { f = items[i].getAsFile(); break; }
  }
  if (!f) return; // 纯文字粘贴走默认行为
  e.preventDefault();
  await insertImage(f);
}

async function insertImage(file) {
  const ed = state.ed;
  const ta = $('#poBody');
  if (!ed || !ta) return;
  const stat = $('#poStat');
  const name = file.name || ('paste.' + (String(file.type).split('/')[1] || 'png'));
  if (stat) stat.textContent = '正在上传 ' + name + ' …';

  let res;
  try {
    res = await fetch(API + '/editor/upload?name=' + encodeURIComponent(name) + '&key=' + encodeURIComponent(ed.id), {
      method: 'POST',
      headers: { 'Content-Type': file.type || 'image/png', ...(TOKEN ? { Authorization: 'Bearer ' + TOKEN } : {}) },
      body: file,
    });
  } catch (e) {
    if (stat) stat.textContent = '上传失败';
    toast('✕ 图片上传失败：' + e.message, true);
    return;
  }
  const txt = await res.text();
  let d = null;
  try { d = txt ? JSON.parse(txt) : null; } catch (e) { /* 透传 */ }
  if (!res.ok || !d || !d.fileName) {
    if (stat) stat.textContent = '上传失败';
    toast('✕ ' + ((d && (d.error || d.msg)) || '上传失败 HTTP ' + res.status), true);
    return;
  }

  // Markdown 里图片必须前后各空一行才是独立段落 —— 统一规范化，避免「图片和文字粘在一起」
  const at = ta.selectionStart == null ? ta.value.length : ta.selectionStart;
  const before = ta.value.slice(0, at).replace(/\n+$/, '');
  const after = ta.value.slice(at).replace(/^\n+/, '');
  const md = '![](' + d.fileName + ')';
  ta.value = (before ? before + '\n\n' : '') + md + '\n\n' + after;
  const pos = (before ? before.length + 2 : 0) + md.length + 2;
  ta.focus();
  ta.setSelectionRange(pos, pos);
  ed.dirty = true;
  if (stat) stat.textContent = '● 已插入图片 ' + d.fileName + '（' + Math.round((d.size || 0) / 1024) + ' KB），记得保存';
  markDirty();
}

/** 发布 / 同步：把改动提交并推到主仓（会触发线上构建） */
async function openGitModal() {
  modal('发布与同步', '<div class="loading">读取仓库状态…</div>');
  let st;
  try {
    st = await api('/editor/git/status');
  } catch (e) {
    $('#modalBody').innerHTML = '<div class="empty"><b>读不到仓库状态</b>' + esc(e.message) + '</div>';
    return;
  }
  const files = (st.files || []).map((f) => '<div class="po-ro-i"><code>' + esc(f.slice(0, 2).trim() || '·') + '</code>' +
    '<span class="v">' + esc(f.slice(2).trim().replace(/^"|"$/g, '')) + '</span></div>').join('') ||
    '<div class="po-ro-i"><span class="v" style="color:var(--muted)">没有改动</span></div>';

  $('#modalBody').innerHTML =
    '<dl class="kv">' +
      '<dt>分支</dt><dd>' + esc(st.branch) + '</dd>' +
      '<dt>改动</dt><dd>' + (st.dirty ? '<span style="color:var(--pend-fg)">' + nfmt(st.changed) + ' 个文件待发布</span>' : '工作区干净') + '</dd>' +
      '<dt>最近提交</dt><dd class="lk" style="font-size:12px">' + esc(st.lastCommit || '—') + '</dd>' +
    '</dl>' +
    '<div style="margin:14px 0 6px;font-size:12px;color:var(--muted)">待发布文件' +
      (st.scoped ? '（只列你自己名下的文章）' : '') + '</div>' +
    '<div class="po-ro" style="max-height:200px;overflow:auto">' + files + '</div>' +
    '<label class="field" style="margin-top:16px"><span class="field-k">提交说明（留空自动生成）</span>' +
      '<input id="poMsg" autocomplete="off" placeholder="例如：修几处错别字"></label>' +
    '<div class="alert" style="margin-bottom:0">' +
      (st.scoped
        ? '发布 = 只提交**你自己名下的文章目录**（别人还没发布的改动不会被顺走），再 commit + push 到主仓触发线上构建。'
        : '发布 = commit + push 到主仓，会触发线上构建。这一步是真的对外可见，想清楚再点。') +
    '</div>' +
    '<div style="display:flex;gap:10px;justify-content:flex-end;margin-top:18px">' +
      '<button class="btn" id="poSync"><span>先同步远程</span></button>' +
      '<button class="btn primary" id="poPub"><span>发布到线上</span></button>' +
    '</div>';

  $('#poSync').onclick = async () => {
    const b = $('#poSync');
    b.dataset.busy = '1';
    try {
      const r = await api('/editor/git/sync', { method: 'POST' });
      toast('✓ 已同步：' + String(r.log || '').split('\n').slice(-1)[0].slice(0, 60));
      closeModal();
    } catch (e) { toast('✕ ' + e.message, true); delete b.dataset.busy; }
  };

  $('#poPub').onclick = async () => {
    const b = $('#poPub');
    b.dataset.busy = '1';
    try {
      const r = await api('/editor/git/publish', { method: 'POST', body: { message: ($('#poMsg') || {}).value || '' } });
      closeModal();
      toast('✓ 已发布到 ' + (r.pushed || []).join(' / ') + (r.warning ? '（部分备份远端失败，见控制台）' : ''));
      if (r.warning) console.warn('[editor] ' + r.warning);
      clearDirtyFlag();
      if (state.ed && !state.ed.isNew) await openPost(state.ed.id); // 重新拉一遍，让状态栏回到「尚未修改」
    } catch (e) {
      toast('✕ ' + e.message, true);
      delete b.dataset.busy;
    }
  };
}

/** 发布成功后前端这个「未保存」标记就该清了（文件已经进到 commit 里） */
function clearDirtyFlag() {
  if (!state.ed) return;
  state.ed.dirty = false;
  const s = $('#poStat');
  if (s) s.textContent = '尚未修改';
}

// ============================================================ 侧边栏抽屉 / 主题

function closeSidebar() {
  const sb = $('#sidebar'), sc = $('#scrim');
  if (sb) sb.classList.remove('open');
  if (sc) sc.hidden = true;
}

function toggleSidebar() {
  const sb = $('#sidebar'), sc = $('#scrim');
  if (!sb) return;
  const open = sb.classList.toggle('open');
  if (sc) sc.hidden = !open;
}

function applyTheme(t) {
  if (t === 'dark') document.documentElement.dataset.theme = 'dark';
  else delete document.documentElement.dataset.theme;
  const b = $('#themeBtn');
  if (b) b.innerHTML = ICONS.moon + '<span>' + (t === 'dark' ? '浅色模式' : '深色模式') + '</span>';
}

function toggleTheme() {
  const cur = document.documentElement.dataset.theme === 'dark' ? 'dark' : 'light';
  const next = cur === 'dark' ? 'light' : 'dark';
  try { localStorage.setItem('atk-theme', next); } catch (e) {}
  applyTheme(next);
}

// ============================================================ 事件委托

document.addEventListener('click', async (e) => {
  const el = e.target.closest('[data-act]');
  if (!el) return;
  const act = el.dataset.act;
  // ★ 不能无脑 parseInt：友链申请的 id 是字符串（la + base36，如 lamus5uptzcdam），
  //   parseInt 会得到 NaN，序列化成 JSON 变成 null —— 后端只看到空 id，一律 400
  //   「id and action required」，表现就是「查看/通过/拒绝点了没反应」。
  //   规矩：纯数字才转数字，其余原样保留。
  const rawId = el.dataset.id || '';
  const id = /^\d+$/.test(rawId) ? parseInt(rawId, 10) : rawId;

  // --- 通用
  if (act === 'modal-close') { closeModal(); return; }
  if (act === 'menu') { toggleSidebar(); return; }
  if (act === 'theme') { toggleTheme(); return; }
  if (act === 'peek-pass') {
    // 登录页的「显示密码」：手机上输长密码很容易打错，看得见才好排查
    const input = $('#lgPass');
    const on = input.type === 'password';
    input.type = on ? 'text' : 'password';
    el.setAttribute('aria-pressed', String(on));
    el.setAttribute('aria-label', on ? '隐藏密码' : '显示密码');
    el.style.color = on ? 'var(--accent)' : '';
    input.focus();
    return;
  }
  if (act === 'tab') {
    const target = el.dataset.id;
    if (target === 'posts' && state.tab === 'posts' && state.ed) {
      // 再点一次「文章编辑」= 从编辑器退回列表
      leaveEditor(() => go('posts'));
      return;
    }
    if (state.tab === target) return;
    if (target !== 'posts' && state.ed && state.ed.dirty) {
      leaveEditor(() => go(target));
      return;
    }
    if (target !== 'posts') state.ed = null;
    go(target);
    return;
  }
  if (act === 'logout') {
    confirmBox('退出登录', '确定要退出当前会话吗？', () => logout());
    return;
  }
  if (act === 'relogin') {
    // 从国内机模式切回完整后台：评论/订阅仍在 Cloudflare，得走那边的会话
    state.direct = false;
    $('#app').hidden = true;
    showGate();
    setTimeout(() => toast('完整后台需经 Cloudflare 登录，国内访问这一跳可能较慢'), 200);
    return;
  }

  if (act === 'cn-line') {
    // 一键跳国内机后台：先向 Worker 要一张「免登录票」（Worker 用共享令牌
    // 签名，国内机验签后直接发会话 Cookie），失败就退回普通地址手动登录。
    toast('正在打开国内线路…');
    let url = 'https://writeapi.usj.cc/admin/';
    try {
      const d = await api('/editor/handoff');
      if (d && d.url) url = d.url;
    } catch (e) { /* 拿不到票就直开，让用户手动登录 */ }
    window.open(url, '_blank', 'noopener');
    return;
  }

  // --- 文章编辑
  if (act === 'po-reload') { el.dataset.busy = '1'; try { await loadPosts(); } finally { delete el.dataset.busy; } return; }
  if (act === 'po-prev') { state.po.page = Math.max(1, state.po.page - 1); await loadPosts(); return; }
  if (act === 'po-next') { state.po.page += 1; await loadPosts(); return; }
  if (act === 'po-open') { await openPost(el.dataset.id); return; }
  if (act === 'po-new') { newPost(); return; }
  if (act === 'po-git') { openGitModal(); return; }
  if (act === 'po-publish') { await publishCurrentPost(); return; }
  if (act === 'po-back') { leaveEditor(() => go('posts')); return; }
  if (act === 'po-save') { await saveCurrentPost(); return; }
  if (act === 'po-reload-post') {
    if (!state.ed) return;
    confirmBox('还原改动', '丢掉当前还没保存的修改，重新从文件读一遍？', async () => {
      await openPost(state.ed.id);
      toast('✓ 已从文件重载');
    });
    return;
  }
  if (act === 'po-del') {
    // 列表里的删除按钮带 data-id/data-title；编辑器里的只带 act
    const did = el.dataset.id || (state.ed && state.ed.id) || '';
    const dtitle = el.dataset.title || (state.ed && state.ed.post && state.ed.post.title) || did;
    if (!did) return;
    confirmBox('删除「' + dtitle + '」',
      '文件会移到服务器上的回收目录（在仓库外，不进 git）：后台立刻少一篇，线上要等你下次点「发布」后才会少。确定删除？',
      async () => {
        await api('/editor/posts/' + encodeURIComponent(did), { method: 'DELETE' });
        toast('✓ 已删除（可在服务器回收目录找回）');
        state.ed = null;
        await go('posts');
      });
    return;
  }

  // --- 评论
  if (act === 'c-reload') { el.dataset.busy = '1'; try { await loadComments(); } finally { delete el.dataset.busy; } return; }
  if (act === 'c-prev') { state.c.offset = Math.max(0, state.c.offset - state.c.limit); await loadComments(); return; }
  if (act === 'c-next') { state.c.offset += state.c.limit; await loadComments(); return; }
  if (act === 'c-toggle') {
    if (state.openReps.has(id)) state.openReps.delete(id); else state.openReps.add(id);
    await loadComments();
    return;
  }
  if (act === 'c-approve' || act === 'c-pin' || act === 'c-fold') {
    const body = {};
    if (act === 'c-approve') body.is_pending = false;
    if (act === 'c-pin') body.is_pinned = el.dataset.v === '1';
    if (act === 'c-fold') body.is_collapsed = el.dataset.v === '1';
    el.dataset.busy = '1';
    try {
      await api('/comments/' + id, { method: 'PUT', body: body });
      toast('✓ 已更新 #' + id);
      await loadComments();
    } catch (ex) { toast('✕ ' + ex.message, true); delete el.dataset.busy; }
    return;
  }
  if (act === 'c-del') {
    confirmBox('删除评论 #' + id, '删除后前台不再显示（软删除，数据仍在库里）。确定继续？', async () => {
      await api('/comments/' + id, { method: 'DELETE' });
      toast('✓ 已删除 #' + id);
      await loadComments();
    });
    return;
  }

  // --- 页面
  if (act === 'p-prev') { state.p.offset = Math.max(0, state.p.offset - state.p.limit); go('pages'); return; }
  if (act === 'p-next') { state.p.offset += state.p.limit; go('pages'); return; }

  // --- 用户
  if (act === 'u-new') { newUser(); return; }
  if (act === 'u-reload') { el.dataset.busy = '1'; try { await loadUsers(); } finally { delete el.dataset.busy; } return; }
  if (act === 'u-prev') { state.u.offset = Math.max(0, state.u.offset - state.u.limit); await loadUsers(); return; }
  if (act === 'u-next') { state.u.offset += state.u.limit; await loadUsers(); return; }
  if (act === 'u-edit') { editUser(id); return; }

  // --- 站点
  if (act === 's-edit') { editSite(id); return; }

  // --- 设置（表单化）
  if (act === 'sf-save') { await saveSettings(); return; }

  // --- 订阅源
  if (act === 'f-reload') { el.dataset.busy = '1'; try { await viewFeeds(); } finally { delete el.dataset.busy; } return; }
  if (act === 'f-add') { addFeed(); return; }
  if (act === 'f-edit') { editFeed(el.dataset.url); return; }
  if (act === 'f-del') {
    const u = el.dataset.url;
    confirmBox('删除订阅源', '确定删除「' + (u || '') + '」吗？', async () => {
      await rssApi('/api/feeds?url=' + encodeURIComponent(u), { method: 'DELETE' });
      toast('✓ 已删除');
      await viewFeeds();
    });
    return;
  }

  // --- 友链申请审核
  if (act === 'l-ap-view' || act === 'l-ap-reject') { viewLinkApply(id); return; }
  if (act === 'l-ap-approve') {
    const a = (state.linkApps || []).find((x) => x.id === id);
    confirmBox('通过申请', '确定通过「' + (a ? a.name : '') + '」的友链申请吗？通过后自动加进友链并邮件通知对方。', async () => {
      await rssApi('/api/link-apply/review', { method: 'POST', body: { id, action: 'approve' } });
      toast('✓ 已通过'); await viewLinks();
    });
    return;
  }
  if (act === 'l-ap-del') {
    const a = (state.linkApps || []).find((x) => x.id === id);
    confirmBox('删除申请记录', '确定删除「' + (a ? a.name : '') + '」这条申请吗？只清掉申请记录，已有的友链不受影响。', async () => {
      await rssApi('/api/link-apply/review', { method: 'POST', body: { id, action: 'delete' } });
      toast('✓ 已删除申请记录'); await viewLinks();
    });
    return;
  }
  // --- 友链
  if (act === 'l-reload') { el.dataset.busy = '1'; try { await viewLinks(); } finally { delete el.dataset.busy; } return; }
  if (act === 'l-add') { addLink(); return; }
  if (act === 'l-edit') { editLink(el.dataset.url); return; }
  if (act === 'l-del') {
    const u = el.dataset.url;
    confirmBox('删除友链', '确定删除「' + (u || '') + '」吗？', async () => {
      await rssApi('/api/links?url=' + encodeURIComponent(u), { method: 'DELETE' });
      toast('✓ 已删除');
      await viewLinks();
    });
    return;
  }
});

// ============================================================ 启动

$('#loginForm').addEventListener('submit', async (e) => {
  e.preventDefault();
  const btn = $('#lgBtn');
  const err = $('#lgErr');
  err.hidden = true;
  btn.dataset.busy = '1';
  try {
    // 国内机模式：换的是本机 Cookie 会话，登录成功直接进文章编辑
    if (state.direct) {
      await directLogin($('#lgUser').value.trim(), $('#lgPass').value);
      enterDirect();
      return;
    }

    await doLogin($('#lgUser').value.trim(), $('#lgPass').value);
    state.me = state.me || {};
    if (!canEnterBackend()) throw new Error('该账号不是管理员或编辑，没有写作后台权限');

    await bootstrap();
  } catch (ex) {
    err.textContent = '✕ ' + ex.message;
    err.hidden = false;
    TOKEN = '';
    localStorage.removeItem(LS_T);
  } finally {
    delete btn.dataset.busy;
  }
});

async function bootstrap() {
  // 编辑角色没有仪表盘/评论/用户那些模块的权限（服务端 requireAdmin 一律 403），
  // 所以不能跟着管理员那套预取走 —— 否则第一句 /sites 就把登录打成「会话已失效」。
  if (isEditor()) { showApp(); return; }

  // 站点列表 -> 默认站点
  const sites = await api('/sites');
  state.sites = sites || [];
  let def = state.sites[0] ? state.sites[0].name : '';
  try {
    const c = await api('/conf');
    if (c && c.frontend_conf && c.frontend_conf.site_default) def = c.frontend_conf.site_default;
  } catch (e) {}
  if (!def && state.sites[0]) def = state.sites[0].name;
  state.site = def;

  // 待审数量（供导航徽章）
  try {
    const p = await api('/comments?' + qs({ scope: 'site', site_name: state.site, type: 'pending', limit: 1 }));
    state.pending = p.count || 0;
  } catch (e) {}

  showApp();
}

applyTheme(document.documentElement.dataset.theme === 'dark' ? 'dark' : 'light');

// Ctrl/⌘ + S 保存当前文章（浏览器默认的「保存网页」在这里没意义，直接接管）
document.addEventListener('keydown', (e) => {
  if ((e.ctrlKey || e.metaKey) && String(e.key).toLowerCase() === 's') {
    if (state.tab === 'posts' && state.ed) {
      e.preventDefault();
      saveCurrentPost();
    }
  }
});

// 关标签页前提醒（只在编辑器里有未保存改动时）
window.addEventListener('beforeunload', (e) => {
  if (state.ed && state.ed.dirty) { e.preventDefault(); e.returnValue = ''; }
});

/**
 * 问一句「本机后台的登录态还在不在」。
 * 只有 editor-api 会回 { mode:'direct' }；Cloudflare 版后台没这条路由，
 * 回的不是这个形状 —— 用它来区分两种部署，比猜域名可靠。
 */
async function probeSession() {
  try {
    const r = await fetch(API + '/admin/session', { credentials: 'same-origin' });
    const d = await r.json().catch(() => null);
    if (!d || d.mode !== 'direct') return null;
    return d;
  } catch (e) { return null; }
}

/** 国内机模式：本机会话已就绪，直接进文章编辑（不经过 Cloudflare） */
function enterDirect() {
  state.direct = true;
  if (!state.me) state.me = { name: 'admin', is_admin: true, role: 'admin' };
  $('#gate').hidden = true;
  $('#app').hidden = false;
  $('#who').innerHTML = esc(state.me.name || 'admin') +
    (isEditor() ? ' <span class="tag" style="font-size:10px">编辑</span>' : '');
  $('#footR').textContent = '编辑器走国内机 · 不经过 Cloudflare';
  go('posts');
}

(async function boot() {
  // ① 本机后台（国内机部署）：先看会话，未登录就亮自己的登录页
  const sess = await probeSession();
  if (sess) {
    state.direct = true;
    if (sess.ok) {
      state.me = sess.user || { name: 'admin', is_admin: true };
      enterDirect();
    } else {
      showGate();
    }
    return;
  }

  // ② Cloudflare 版后台：沿用原来的令牌流程
  if (!TOKEN) { showGate(); return; }
  try {
    // /user 未登录时返回 200 + {user:null}，所以要显式判 is_login
    const me = await api('/user');
    if (!me || !me.user || !me.is_login) throw Object.assign(new Error('会话已失效'), { status: 401 });
    state.me = me.user;
    if (!canEnterBackend()) throw Object.assign(new Error('该账号不是管理员或编辑，没有写作后台权限'), { status: 403 });
    localStorage.setItem(LS_U, JSON.stringify(state.me));
    await bootstrap();
  } catch (e) {
    logout(e.status ? '会话已失效，请重新登录' : ('连接失败：' + e.message));
  }
})();

})();