宜博 / h3livestream

dance.html 49.5 KB
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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>换装跳舞直播间</title>
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Shrikhand&display=swap" />
<link rel="stylesheet" href="live.css" />
<link rel="stylesheet" href="dance.css" />
<style>
  .like-btn { margin-top: 6px; font: bold 12px Tahoma, sans-serif; cursor: pointer; border: 3px solid #000; border-radius: 10px; background: #fff; color: var(--ink); padding: 4px 10px; box-shadow: var(--shadow-sm); }
  .like-btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 #000; }
  .wardrobe-card .meta { font-size: 11px; font-weight: bold; opacity: .6; margin-top: 3px; }
</style>
</head>
<body>
<div class="channel">
  <header class="topbar">
    <h1 class="logo" id="roomTitle">换装跳舞直播间</h1>
    <div class="spacer"></div>
    <div class="watching" id="watchingCount" hidden></div>
    <button class="topbar-pill" id="muteBtn">🔇 静音</button>
    <a class="topbar-pill" id="myWorksLink" href="my-works.html" hidden>📁 我的作品</a>
    <button class="topbar-pill" id="topupBtn" hidden>💰 充值</button>
    <button class="topbar-pill" id="authBtn">登录</button>
    <a class="topbar-pill" href="dance-rooms.html">🏠 直播间列表</a>
    <a class="topbar-pill" href="live.html">AI 短剧频道 →</a>
  </header>

  <div id="topupBanner" hidden></div>

  <div class="body" id="body">
    <!-- T42: "传衣服"/"传人" 两个 tab 撤掉了，付费上传的入口挪到底下换装
         横条里的 DIY 卡片（见 #diyModal）——左栏现在只剩"待播放"，不需要
         tab 切换 UI 了。 -->
    <aside class="left-col" id="leftCol">
      <div class="section-head">待播放</div>
      <div class="clip-list" id="leftPanel"></div>
      <div class="site-credit">🍋 <span>换装跳舞直播间</span></div>
    </aside>

    <div class="player-col">
      <div class="player-wrap">
        <div class="live-pill" id="liveDot"><span class="dot"></span>直播中</div>
        <!-- T40: 居中"正在换装"胶囊，取代原来贴在左上角、跟昵称混在一起的
             now-playing-box 文字框；空态提示文案（"还没有可播放的内容…"）
             复用同一个胶囊，只是不带 🔥 前缀（见 setNowPlaying）。 -->
        <div class="active-pill" id="activePill" hidden>
          <span class="active-label" id="activeLabel">🔥 正在换装</span>
          <span class="active-nick" id="activeNick"></span>
        </div>
        <div class="queue-strip" id="queueStrip" hidden></div>
        <div class="now-playing-box" id="nowPlayingBox" hidden>
          <button class="like-btn" id="likeBtn" hidden>❤️ <span id="likeCount">0</span></button>
        </div>
        <video id="player" autoplay playsinline></video>
        <div class="curtain" id="curtain"><div class="curtain-half left"></div><div class="curtain-half right"></div></div>
      </div>
      <!-- T42: 原来右侧栏的"选衣服"网格改成贴视频底部的横向条。 -->
      <div class="wardrobe-strip-wrap">
        <div class="wardrobe-strip-title">选衣服</div>
        <div class="wardrobe-strip" id="pickPanel"></div>
      </div>
    </div>

    <!-- T46: 右侧栏回来了，这次装的是聊天，不是选衣服——跟 live.html 同一套
         .chat-list/.chat-msg/.chat-input-row 样式，dance room 专属的
         /api/dance/chat 接口（不走 live.html 那个会触发生成任务的 /api/chat，
         见 server.js pushDanceChatMessage 的注释）。 -->
    <aside class="right-col" id="rightCol">
      <div class="section-title">聊天</div>
      <div class="chat-list" id="chatList"></div>
      <div class="chat-identity-row" id="chatIdentityRow" hidden>
        <span id="currentNickname"></span>
        <button id="changeNameBtn">改昵称</button>
      </div>
      <div class="chat-input-row">
        <input type="text" id="chatInput" placeholder="说点什么…" maxlength="300" />
        <button id="chatSendBtn">发送</button>
      </div>
      <div class="say-hint" id="chatHint"></div>
    </aside>
  </div>
</div>

<!-- 点击进入蒙版（同 live.html）：视频先静音自动播放，这次点击是浏览器要求的
     "用户手势"，借它把播放切到有声——绕开"未经手势不能自动有声播放"的限制。 -->
<div class="splash" id="splash">
  <div class="splash-inner">
    <div class="splash-logo">换装跳舞直播间</div>
    <div class="splash-play">▶</div>
    <div class="splash-sub">AI 生成的换装舞蹈直播<br />点击进入，开声音看直播</div>
    <div class="splash-credit">🍋 换装跳舞直播间 出品</div>
  </div>
</div>

<!-- 5.1 节：首次进入强制年龄确认，非模态（点背景不关），一次性 cookie 记忆 -->
<div class="nickname-modal" id="ageGateModal" hidden>
  <div class="nickname-box age-box">
    <div class="nickname-title">进入前确认</div>
    <div class="age-disclaimer">
      本频道播放 AI 生成的换装舞蹈内容，服饰类别可能包含泳装/舞台表演装等，全部角色与画面均由 AI 生成，不代表真实人物行为。<br /><br />
      继续访问即表示您确认已年满 18 周岁。
    </div>
    <button id="ageConfirmBtn">我已满18岁，继续</button>
  </div>
</div>

<div class="nickname-modal" id="nicknameModal" hidden>
  <div class="nickname-box">
    <div class="nickname-title">先起个昵称才能点赞</div>
    <input type="text" id="nicknameInput" placeholder="你的昵称" maxlength="20" />
    <button id="nicknameConfirmBtn">确定</button>
  </div>
</div>

<!-- 登录完全可选，不阻塞免费模式一的任何现有流程（dev-plan-3.md T22） -->
<div class="nickname-modal" id="authModal" hidden>
  <div class="nickname-box">
    <div class="nickname-title" id="authTitle">登录</div>
    <input type="email" id="authEmail" placeholder="邮箱" />
    <input type="password" id="authPassword" placeholder="密码（至少8位）" />
    <div class="auth-error" id="authError" hidden></div>
    <button id="authSubmitBtn">登录</button>
    <button class="auth-link-btn" id="authToggleBtn">没有账号？去注册</button>
    <button class="auth-link-btn" id="authCloseBtn">取消</button>
  </div>
</div>

<!-- T29: topup tier picker — reuses .nickname-modal/.nickname-box's shell -->
<div class="nickname-modal" id="topupModal" hidden>
  <div class="nickname-box">
    <div class="nickname-title">充值</div>
    <div id="topupTierList"></div>
    <button class="auth-link-btn" id="topupCloseBtn">取消</button>
  </div>
</div>

<!-- T42: 换装横条末尾的 DIY 卡片点开后弹这个——先二选一，再展开对应的
     上传表单（原来 T28/T37 各自的左栏 tab 面板，原样搬进来，付费/登录/
     邮箱验证门槛完全不变，只是换了个入口位置）。"传人"会离开当前房间，
     文案里必须写清楚，不能跟"传衣服"的"原地生成"混为一谈。 -->
<div class="nickname-modal" id="diyModal" hidden>
  <div class="nickname-box diy-box">
    <div class="nickname-title">上传</div>
    <div id="diyChoice">
      <button class="diy-choice-btn" data-diy="garment">
        👗 传衣服给 TA 穿
        <span class="diy-choice-hint">原地生成，留在当前房间</span>
      </button>
      <button class="diy-choice-btn" data-diy="character">
        🧑 传新角色，开一个新直播间
        <span class="diy-choice-hint">会离开当前房间，去新角色自己的房间</span>
      </button>
    </div>
    <div id="diyForm"></div>
    <button class="auth-link-btn" id="diyCloseBtn">取消</button>
  </div>
</div>

<script>
// One live room per character (2026-09): this page is always scoped to one
// characterId from the URL — no characterId means there's no room to show.
const characterId = new URLSearchParams(location.search).get("characterId");
if (!characterId) location.href = "dance-rooms.html";

let wardrobe = [];
let lastState = null; // latest /api/dance/live/state response — the "待播放" left tab renders off this
let diyMode = null; // T42: null | "garment" | "character" — which upload form the DIY modal is showing, if any
let currentClipId = null;
let statePollTimer = null;
let advanceTimer = null;
let upNextCache = [];
const clientId = Math.random().toString(36).slice(2);
// T41: whether the primary pointer actually supports hover (mouse/trackpad)
// vs not (touch) — decides whether wardrobe cards reveal "发送" on :hover
// (desktop) or need an explicit first tap (mobile). Read once; doesn't need
// to react to a mid-session input-mode change.
const supportsHover = window.matchMedia("(hover: hover)").matches;

const player = document.getElementById("player");
const leftPanel = document.getElementById("leftPanel");
const pickPanel = document.getElementById("pickPanel");
const roomTitle = document.getElementById("roomTitle");
const nowPlayingBox = document.getElementById("nowPlayingBox");
const activePill = document.getElementById("activePill");
const activeLabel = document.getElementById("activeLabel");
const activeNick = document.getElementById("activeNick");
const queueStrip = document.getElementById("queueStrip");
const likeBtn = document.getElementById("likeBtn");
const likeCount = document.getElementById("likeCount");
const watchingCount = document.getElementById("watchingCount");
const muteBtn = document.getElementById("muteBtn");
const splash = document.getElementById("splash");
const ageGateModal = document.getElementById("ageGateModal");
const ageConfirmBtn = document.getElementById("ageConfirmBtn");
const nicknameModal = document.getElementById("nicknameModal");
const nicknameInput = document.getElementById("nicknameInput");
const nicknameConfirmBtn = document.getElementById("nicknameConfirmBtn");
// T46
const chatList = document.getElementById("chatList");
const chatInput = document.getElementById("chatInput");
const chatSendBtn = document.getElementById("chatSendBtn");
const chatHint = document.getElementById("chatHint");
const chatIdentityRow = document.getElementById("chatIdentityRow");
const changeNameBtn = document.getElementById("changeNameBtn");
const currentNickname = document.getElementById("currentNickname");
let chatPollTimer = null;

function escapeHtml(s) {
  const div = document.createElement("div");
  div.textContent = s || "";
  return div.innerHTML;
}
// T40: same per-nickname pastel-hash as live.html's chat nicknames — reused
// here for the queue-strip avatar badges (stable color per person, no
// server-assigned avatar system needed).
function pastel(name) {
  let h = 0;
  for (const c of name || "") h = (h * 31 + c.charCodeAt(0)) % 360;
  return `hsl(${h},85%,85%)`;
}
function getCookie(name) {
  const m = document.cookie.match(new RegExp(`(?:^|; )${name}=([^;]*)`));
  return m ? decodeURIComponent(m[1]) : null;
}
function setCookie(name, value, days) {
  document.cookie = `${name}=${encodeURIComponent(value)}; max-age=${days * 86400}; path=/; samesite=lax`;
}

// ---- 5.1 年龄确认：非模态强制，一次性记忆，不能点背景关闭（没有绑定 backdrop click） ----
if (!getCookie("dance_age_confirmed")) ageGateModal.hidden = false;
ageConfirmBtn.addEventListener("click", () => {
  setCookie("dance_age_confirmed", "1", 365);
  ageGateModal.hidden = true;
});

// ---- viewer identity: same cookie pair as live.html, only needed to vote ----
function getIdentity() {
  const uid = getCookie("viewer_uid");
  const nickname = getCookie("viewer_nickname");
  return uid && nickname ? { uid, nickname } : null;
}
function openNicknameModal(prefill) {
  return new Promise((resolve) => {
    nicknameModal.hidden = false;
    nicknameInput.value = prefill || "";
    nicknameInput.focus();
    const onConfirm = () => {
      const nickname = nicknameInput.value.trim().slice(0, 20);
      if (!nickname) return;
      nicknameModal.hidden = true;
      nicknameConfirmBtn.removeEventListener("click", onConfirm);
      nicknameInput.removeEventListener("keydown", onKeydown);
      resolve(nickname);
    };
    const onKeydown = (e) => {
      if (e.key === "Enter") onConfirm();
    };
    nicknameConfirmBtn.addEventListener("click", onConfirm);
    nicknameInput.addEventListener("keydown", onKeydown);
  });
}
function ensureIdentity() {
  const existing = getIdentity();
  if (existing) return Promise.resolve(existing);
  return openNicknameModal("").then((nickname) => {
    const uid = crypto.randomUUID ? crypto.randomUUID() : `${Date.now()}-${Math.random().toString(36).slice(2)}`;
    setCookie("viewer_uid", uid, 365);
    setCookie("viewer_nickname", nickname, 365);
    updateNicknameLabel();
    return { uid, nickname };
  });
}

// T46: same identity-label pattern as live.html — the nickname row above
// the chat input only shows once a cookie actually exists.
function updateNicknameLabel() {
  const existing = getIdentity();
  chatIdentityRow.hidden = !existing;
  if (existing) currentNickname.textContent = existing.nickname;
}
changeNameBtn.addEventListener("click", async () => {
  const existing = getIdentity();
  const nickname = await openNicknameModal(existing ? existing.nickname : "");
  const uid = existing ? existing.uid : crypto.randomUUID ? crypto.randomUUID() : `${Date.now()}-${Math.random().toString(36).slice(2)}`;
  setCookie("viewer_uid", uid, 365);
  setCookie("viewer_nickname", nickname, 365);
  updateNicknameLabel();
});
// 第一次点聊天输入框才弹昵称——跟点赞的既有触发时机一致，不强制进房就填。
chatInput.addEventListener("focus", () => ensureIdentity());
updateNicknameLabel();

// ---- account login (dev-plan-3.md T19-T22) — entirely optional. Free
// wardrobe picks/voting keep using the plain viewer_uid cookie above
// exactly as before; logging in just also ties that identity to an
// account server-side (T21) and, on login, re-syncs viewer_uid/
// viewer_nickname onto this browser so switching devices or clearing
// cookies doesn't silently start a fresh anonymous identity.
const authBtn = document.getElementById("authBtn");
const topupBtn = document.getElementById("topupBtn");
const myWorksLink = document.getElementById("myWorksLink");
const topupBanner = document.getElementById("topupBanner");
const authModal = document.getElementById("authModal");
const authTitle = document.getElementById("authTitle");
const authEmail = document.getElementById("authEmail");
const authPassword = document.getElementById("authPassword");
const authError = document.getElementById("authError");
const authSubmitBtn = document.getElementById("authSubmitBtn");
const authToggleBtn = document.getElementById("authToggleBtn");
const authCloseBtn = document.getElementById("authCloseBtn");
let authMode = "login";
let currentUser = null; // T28/T29 need to know login/emailVerified/creditBalance beyond just "is authBtn's dot lit"

function renderAuthButton(user) {
  currentUser = user;
  authBtn.textContent = user ? `${user.nickname || user.email.split("@")[0]} · 💰${user.creditBalance} · 退出` : "登录";
  authBtn.dataset.loggedIn = user ? "1" : "";
  topupBtn.hidden = !user;
  myWorksLink.hidden = !user;
  // T42: if the DIY modal's upload form is open, re-render it — price/
  // balance-gated content (登录态、积分余额) depends on login state, same
  // reasoning as the old leftTab-driven re-render this replaces.
  if (diyMode) renderDiyForm(diyMode);
}

async function refreshAuthState() {
  try {
    const res = await fetch("/api/auth/me");
    if (res.ok) {
      renderAuthButton(await res.json());
      return;
    }
  } catch {}
  renderAuthButton(null);
}

function openAuthModal(mode) {
  authMode = mode;
  authTitle.textContent = mode === "login" ? "登录" : "注册";
  authSubmitBtn.textContent = mode === "login" ? "登录" : "注册";
  authToggleBtn.textContent = mode === "login" ? "没有账号？去注册" : "已有账号？去登录";
  authError.hidden = true;
  authEmail.value = "";
  authPassword.value = "";
  // T42: submitGarmentUpload/submitCharacterUpload can call this while the
  // DIY modal is still open (未登录时先引导登录) — both are .nickname-modal
  // with the same z-index, and diyModal comes later in the DOM, so without
  // this it silently sits on top and hides the login form the user actually
  // needs to see.
  diyModal.hidden = true;
  authModal.hidden = false;
  authEmail.focus();
}

authBtn.addEventListener("click", async () => {
  if (authBtn.dataset.loggedIn) {
    await fetch("/api/auth/logout", { method: "POST" });
    await refreshAuthState();
    return;
  }
  openAuthModal("login");
});
authToggleBtn.addEventListener("click", () => openAuthModal(authMode === "login" ? "register" : "login"));
authCloseBtn.addEventListener("click", () => {
  authModal.hidden = true;
});
async function submitAuth() {
  const email = authEmail.value.trim();
  const password = authPassword.value;
  authError.hidden = true;
  const res = await fetch(`/api/auth/${authMode}`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ email, password }),
  });
  const body = await res.json().catch(() => ({}));
  if (!res.ok) {
    authError.textContent = body.error || "出错了，请重试";
    authError.hidden = false;
    return;
  }
  authModal.hidden = true;
  await refreshAuthState();
}
authSubmitBtn.addEventListener("click", submitAuth);
authPassword.addEventListener("keydown", (e) => {
  if (e.key === "Enter") submitAuth();
});

refreshAuthState();

// ---- T29: 积分余额 + 充值 (dev-plan-4.md) ----
let pricing = [];
async function loadPricing() {
  try {
    pricing = await fetch("/api/pricing").then((r) => r.json());
  } catch {
    pricing = [];
  }
}

const topupModal = document.getElementById("topupModal");
const topupTierList = document.getElementById("topupTierList");
const topupCloseBtn = document.getElementById("topupCloseBtn");

function renderTopupTiers() {
  const tiers = pricing.filter((p) => p.kind === "topup_tier");
  topupTierList.innerHTML = tiers.length
    ? tiers
        .map(
          (t) => `
      <div class="topup-tier">
        <div><div class="credits">${t.credits} 积分</div>${t.priceCents != null ? `<div class="hint">$${(t.priceCents / 100).toFixed(2)}</div>` : ""}</div>
        <button data-tier="${t.key}">购买</button>
      </div>`
        )
        .join("")
    : `<div class="empty-hint">暂无可购买档位</div>`;
  topupTierList.querySelectorAll("[data-tier]").forEach((btn) =>
    btn.addEventListener("click", async () => {
      btn.disabled = true;
      try {
        const res = await fetch("/api/credits/checkout", {
          method: "POST",
          headers: { "Content-Type": "application/json" },
          body: JSON.stringify({ tierKey: btn.dataset.tier }),
        });
        const data = await res.json();
        if (!res.ok) {
          alert(data.error || "创建支付会话失败");
          return;
        }
        location.href = data.url; // Stripe's hosted page (real) or the mock completion URL — both redirect back here
      } finally {
        btn.disabled = false;
      }
    })
  );
}

topupBtn.addEventListener("click", async () => {
  if (!currentUser) {
    openAuthModal("login");
    return;
  }
  if (!pricing.length) await loadPricing();
  renderTopupTiers();
  topupModal.hidden = false;
});
topupCloseBtn.addEventListener("click", () => {
  topupModal.hidden = true;
});

// A redirect back from Stripe (or the mock checkout) lands here with
// ?topup=success/cancelled — show a one-off banner, then scrub the query
// string so a page refresh doesn't keep re-showing it.
(function showTopupBanner() {
  const topup = new URLSearchParams(location.search).get("topup");
  if (!topup) return;
  topupBanner.hidden = false;
  topupBanner.className = topup === "success" ? "topup-banner success" : "topup-banner cancelled";
  topupBanner.textContent = topup === "success" ? "充值成功！" : "已取消充值";
  history.replaceState(null, "", location.pathname);
})();

loadPricing();

muteBtn.addEventListener("click", () => {
  player.muted = !player.muted;
  muteBtn.textContent = player.muted ? "🔇 静音" : "🔈 有声";
  if (!player.muted) player.play().catch(() => {});
});

// Default to sound on (同 live.html). Chrome/Safari 在没有用户手势前不允许
// 有声自动播放，unmuted play() 被拒绝就退回静音自动播放，再靠下面的点击进入
// 蒙版拿到那次手势，切回有声。
function tryPlay() {
  player.play().catch((err) => {
    // Only fall back to muted autoplay for an actual autoplay-policy
    // rejection. tryPlay() re-runs on every clip switch (every ~10s), and a
    // switch mid-load commonly throws AbortError ("interrupted by a new
    // load request") — treating that the same as a policy block used to
    // silently flip sound back off even after the viewer had explicitly
    // unmuted via the splash click or 🔈 button.
    if (err && err.name !== "NotAllowedError") return;
    player.muted = true;
    muteBtn.textContent = "🔇 静音";
    player.play().catch(() => {});
  });
}

splash.addEventListener("click", () => {
  splash.remove();
  const desktop = matchMedia("(min-width: 769px)").matches;
  player.muted = !desktop; // 手机进入后仍保持静音，同 live.html 的理由
  player.play().catch((err) => {
    // Same guard as tryPlay(): only a genuine autoplay-policy rejection
    // should force muted — this click IS the user gesture, so a rejection
    // here is almost always something else (e.g. the clip's src still
    // mid-switch from a just-arrived pollState) and shouldn't silently
    // override the sound-on choice this click just made.
    if (!err || err.name === "NotAllowedError") player.muted = true;
    muteBtn.textContent = player.muted ? "🔇 静音" : "🔈 有声";
  });
  muteBtn.textContent = player.muted ? "🔇 静音" : "🔈 有声";
});

// ---- 左侧栏：待播放 / 传衣服 / 传人 三个 tab ----
function garmentName(id) {
  const g = wardrobe.find((x) => x.id === id);
  return g ? g.name : id;
}
function garmentImage(id) {
  const g = wardrobe.find((x) => x.id === id);
  return g ? g.thumbnailUrl || g.imageUrl : null;
}

// "待播放" tab just renders lastState.upNext — same data pollState() already
// has, no separate fetch. Shows the garment's own thumbnail, not just its
// name, same wardrobe-card look as the picker on the right.
function renderQueueTab() {
  const upcoming = (lastState && lastState.upNext) || [];
  leftPanel.innerHTML = upcoming.length
    ? `<div class="wardrobe-grid">${upcoming
        .map((c) => {
          const img = garmentImage(c.garmentId);
          return `
      <div class="wardrobe-card">
        ${img ? `<img src="${escapeHtml(img)}" />` : ""}
        <div class="name">${escapeHtml(c.prompt || garmentName(c.garmentId))}</div>
        ${c.requestedBy ? `<div class="meta">by ${escapeHtml(c.requestedBy)}</div>` : ""}
      </div>`;
        })
        .join("")}</div>`
    : `<div class="empty-hint">暂无排队，去右边选一件衣服吧</div>`;
}

// ---- T42: DIY 弹窗——换装横条末尾的 DIY 卡片点开后先二选一，再展开对应
// 的上传表单；下面两个 render*UploadPanel 原来是写进左栏 leftPanel 的，
// 现在改写进弹窗的 #diyForm，付费/登录/邮箱验证逻辑完全不动。 ----
const diyModal = document.getElementById("diyModal");
const diyChoice = document.getElementById("diyChoice");
const diyForm = document.getElementById("diyForm");
const diyCloseBtn = document.getElementById("diyCloseBtn");

function openDiyModal() {
  diyMode = null;
  diyChoice.hidden = false;
  diyForm.innerHTML = "";
  diyModal.hidden = false;
}
function renderDiyForm(mode) {
  diyMode = mode;
  diyChoice.hidden = true;
  if (mode === "garment") renderGarmentUploadPanel();
  else renderCharacterUploadPanel();
}
diyModal.querySelectorAll("[data-diy]").forEach((b) => b.addEventListener("click", () => renderDiyForm(b.dataset.diy)));
diyCloseBtn.addEventListener("click", () => {
  diyModal.hidden = true;
  diyMode = null;
});

// ---- T44: 上传进度条——伪进度+真进度混合（参考分析 §3），共用于模式二/
// 三两个上传表单。`fetch` 的 FormData 上传拿不到进度事件，改用 XHR。 ----
function uploadWithProgress(url, formData, onProgress) {
  return new Promise((resolve, reject) => {
    const xhr = new XMLHttpRequest();
    xhr.open("POST", url);
    xhr.upload.onprogress = (e) => {
      if (e.lengthComputable) onProgress(e.loaded / e.total);
    };
    xhr.onload = () => {
      let data = {};
      try {
        data = JSON.parse(xhr.responseText);
      } catch {
        // non-JSON body — data stays {}, caller falls back to a generic error message
      }
      resolve({ status: xhr.status, data });
    };
    xhr.onerror = () => reject(new Error("network error"));
    xhr.send(formData);
  });
}
// 按文件大小估算一个基准时长，缓动推到 88%；真实进度一旦追上就用真值
// （`report` 内部用 max 卡住不倒退）。`finish()` 保证至少可见 500ms 再跳
// 100%——小图上传经常几十毫秒就完事，不留这个下限的话进度条等于白做，
// 一闪就没了，看不出动画。
function createUploadProgress(bar, fileSize) {
  bar.hidden = false;
  bar.style.setProperty("--pct", "0%");
  const startedAt = Date.now();
  const MIN_VISIBLE_MS = 500;
  let pct = 0;
  const setPct = (p) => {
    pct = Math.max(pct, Math.min(p, 100));
    bar.style.setProperty("--pct", `${pct}%`);
  };
  const durationMs = Math.min(25000, Math.max(3000, (fileSize / 262144) * 1000));
  const timer = setInterval(() => {
    setPct(Math.min(88, ((Date.now() - startedAt) / durationMs) * 88));
  }, 120);
  return {
    report(realPct) {
      setPct(realPct);
    },
    async finish() {
      clearInterval(timer);
      const elapsed = Date.now() - startedAt;
      if (elapsed < MIN_VISIBLE_MS) await new Promise((r) => setTimeout(r, MIN_VISIBLE_MS - elapsed));
      setPct(100);
      await new Promise((r) => setTimeout(r, 400));
      bar.hidden = true;
    },
    stop() {
      clearInterval(timer);
      bar.hidden = true;
    },
  };
}

// ---- T28: 模式二"传衣服"（付费，需登录+邮箱验证） ----
function renderGarmentUploadPanel() {
  const spendGarment = pricing.find((p) => p.key === "spend_garment");
  const priceLine = spendGarment ? `上传一张衣服照片，AI 换装生成跳舞视频，扣 ${spendGarment.credits} 积分` : "加载价格中…";
  diyForm.innerHTML = `
    <div class="upload-panel">
      <div class="hint">${priceLine}</div>
      <input type="file" id="garmentFileInput" accept="image/jpeg,image/png,image/webp" />
      <button id="garmentUploadBtn">上传并生成</button>
      <div class="upload-progress" id="garmentUploadProgress" hidden><div class="upload-progress-bar"></div></div>
      <div class="upload-error" id="garmentUploadError" hidden></div>
      <div class="upload-status" id="garmentUploadStatus" hidden></div>
    </div>`;
  document.getElementById("garmentUploadBtn").addEventListener("click", submitGarmentUpload);
}

async function submitGarmentUpload() {
  const fileInput = document.getElementById("garmentFileInput");
  const errorBox = document.getElementById("garmentUploadError");
  const statusBox = document.getElementById("garmentUploadStatus");
  const progressBar = document.getElementById("garmentUploadProgress");
  const btn = document.getElementById("garmentUploadBtn");
  errorBox.hidden = true;
  statusBox.hidden = true;

  // 未登录/未验证先引导，而不是提交后静默失败（T28 验收标准）
  if (!currentUser) {
    openAuthModal("login");
    return;
  }
  if (!currentUser.emailVerified) {
    errorBox.hidden = false;
    errorBox.textContent = "请先完成邮箱验证后再上传（查看邮箱中的验证链接）";
    return;
  }
  const file = fileInput.files[0];
  if (!file) {
    errorBox.hidden = false;
    errorBox.textContent = "请先选择一张图片";
    return;
  }

  btn.disabled = true;
  statusBox.hidden = false;
  statusBox.textContent = "上传中…";
  const progress = createUploadProgress(progressBar, file.size);
  try {
    const fd = new FormData();
    fd.append("file", file);
    fd.append("characterId", characterId);
    const { status, data } = await uploadWithProgress("/api/dance/upload-garment", fd, (frac) => progress.report(frac * 100));
    if (status < 200 || status >= 300) {
      progress.stop();
      statusBox.hidden = true;
      errorBox.hidden = false;
      if (status === 402) {
        errorBox.textContent = "积分不足，请先充值";
      } else {
        errorBox.textContent = data.error || "上传失败";
      }
      return;
    }
    await progress.finish();
    const message = data.status === "ready" ? "生成完成，已加入播放队列！" : "生成中，完成后会自动加入播放队列";
    // refreshAuthState() re-renders this whole panel (creditBalance changed
    // -> renderAuthButton -> renderDiyForm) — setting the message before
    // that would just get wiped by the fresh render, so set it after and
    // re-query, not on the (now-replaced) statusBox/fileInput above.
    await refreshAuthState();
    document.getElementById("garmentFileInput").value = "";
    const freshStatusBox = document.getElementById("garmentUploadStatus");
    freshStatusBox.hidden = false;
    freshStatusBox.textContent = message;
    pollState(); // surface the new queue entry immediately, same as pickGarment
  } catch {
    progress.stop();
    statusBox.hidden = true;
    errorBox.hidden = false;
    errorBox.textContent = "网络错误，请重试";
  } finally {
    btn.disabled = false;
  }
}

// ---- T37: 模式三"传人"（付费，需登录+邮箱验证） ----
function renderCharacterUploadPanel() {
  const spendCharacter = pricing.find((p) => p.key === "spend_character_per_segment");
  const costPerSegment = spendCharacter ? Math.ceil(spendCharacter.credits / (spendCharacter.segmentsPerUnit || 1)) : null;
  const priceLine = costPerSegment != null ? `上传一张人物照片，每购买 1 个 10 秒片段扣 ${costPerSegment} 积分——买得越多，这个新角色在直播间露出的时长越长` : "加载价格中…";
  const garmentOptions = wardrobe.map((g) => `<option value="${g.id}">${escapeHtml(g.name)}</option>`).join("");
  diyForm.innerHTML = `
    <div class="upload-panel">
      <div class="hint">${priceLine}</div>
      <input type="file" id="characterFileInput" accept="image/jpeg,image/png,image/webp" />
      <label class="field-label" for="characterGarmentSelect">搭配衣服（不选则随机搭配）</label>
      <select id="characterGarmentSelect">
        <option value="">随机搭配</option>
        ${garmentOptions}
      </select>
      <label class="field-label" for="characterSegmentsInput">购买片段数（每个 10 秒）</label>
      <input type="number" id="characterSegmentsInput" min="1" max="20" value="3" style="width:100%;margin-bottom:10px;" />
      <button id="characterUploadBtn">上传并插队播放</button>
      <div class="upload-progress" id="characterUploadProgress" hidden><div class="upload-progress-bar"></div></div>
      <div class="upload-error" id="characterUploadError" hidden></div>
      <div class="upload-status" id="characterUploadStatus" hidden></div>
    </div>`;
  document.getElementById("characterUploadBtn").addEventListener("click", submitCharacterUpload);
}

async function submitCharacterUpload() {
  const fileInput = document.getElementById("characterFileInput");
  const garmentSelect = document.getElementById("characterGarmentSelect");
  const segmentsInput = document.getElementById("characterSegmentsInput");
  const errorBox = document.getElementById("characterUploadError");
  const statusBox = document.getElementById("characterUploadStatus");
  const progressBar = document.getElementById("characterUploadProgress");
  const btn = document.getElementById("characterUploadBtn");
  errorBox.hidden = true;
  statusBox.hidden = true;
  statusBox.classList.remove("boosted");

  // 未登录/未验证先引导，而不是提交后静默失败（同 T28 验收标准）
  if (!currentUser) {
    openAuthModal("login");
    return;
  }
  if (!currentUser.emailVerified) {
    errorBox.hidden = false;
    errorBox.textContent = "请先完成邮箱验证后再上传（查看邮箱中的验证链接）";
    return;
  }
  const file = fileInput.files[0];
  if (!file) {
    errorBox.hidden = false;
    errorBox.textContent = "请先选择一张人物照片";
    return;
  }

  btn.disabled = true;
  statusBox.hidden = false;
  statusBox.textContent = "上传中…";
  const progress = createUploadProgress(progressBar, file.size);
  try {
    const fd = new FormData();
    fd.append("file", file);
    if (garmentSelect.value) fd.append("garmentId", garmentSelect.value);
    fd.append("segments", segmentsInput.value || "3");
    const { status, data } = await uploadWithProgress("/api/dance/upload-character", fd, (frac) => progress.report(frac * 100));
    if (status < 200 || status >= 300) {
      progress.stop();
      statusBox.hidden = true;
      errorBox.hidden = false;
      errorBox.textContent = status === 402 ? "积分不足，请先充值" : data.error || "上传失败";
      return;
    }
    // This purchase just created a brand-new character, i.e. a brand-new
    // room (getDanceRoomCharacterIds: "有视频就自动开间") — send the buyer
    // straight there instead of leaving them in this room where their new
    // character's clip will never actually appear. Navigating away right
    // after a 200 makes finishing the progress-bar animation pointless —
    // this page is gone before anyone would see it.
    location.href = `dance.html?characterId=${data.characterId}`;
    return;
  } catch {
    progress.stop();
    statusBox.hidden = true;
    errorBox.hidden = false;
    errorBox.textContent = "网络错误，请重试";
  } finally {
    btn.disabled = false;
  }
}

// Wardrobe is scoped to this room and only ever lists garments THIS
// character already has a generated video for (server-side shuffled) — a
// pick here is always a cache hit, never a fresh generation.
async function loadWardrobe() {
  const res = await fetch(`/api/dance/wardrobe?characterId=${characterId}`);
  wardrobe = await res.json();
  renderPickPanel();
}

async function pickGarment(garmentId, card) {
  if (card.classList.contains("disabled")) return;
  card.classList.add("disabled");
  try {
    const identity = getIdentity(); // 免费模式一不强制登录（架构文档 2.7 节）— 有 cookie 就带上昵称，没有也能提交
    const res = await fetch("/api/dance/pick", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      // uid 只在已经有 cookie 时才带上——T48 的"同 uid 限流"只对已识别的
      // uid 生效，没有 cookie 的匿名提交继续不受限（同"免费模式一不强制
      // 登录"的既有承诺，见上面那行注释）。
      body: JSON.stringify({ characterId, garmentId, uid: identity ? identity.uid : undefined, nickname: identity ? identity.nickname : undefined }),
    });
    const data = await res.json();
    if (!res.ok) {
      alert(data.error || "提交失败");
      return;
    }
    pollState();
  } finally {
    card.classList.remove("disabled");
  }
}

// ---- 右侧栏：选衣服（乱序待选列表）+ 生成中/失败（模式二/三上传偶尔会有） ----
function renderPickPanel() {
  const queue = (lastState && lastState.queue) || [];
  const generating = queue.filter((q) => q.status === "generating");
  const failed = queue.filter((q) => q.status === "failed");
  // T48: "generating" is the only status worth checking here — "ready"
  // entries get swept into the schedule within one tick and are never
  // long-lived enough to matter for this UI (and state.queue doesn't even
  // include them, see /api/dance/live/state's own filter).
  const myPending = queue.some((q) => q.mine && q.status === "generating");

  // T41: 缩略图默认只显示图+名字，桌面 hover / 移动端点一下先露出"发送"
  // 按钮再确认，避免像以前那样点一下卡片就直接提交（容易误触）。
  // T42: 横向一条（.wardrobe-strip-row），末尾加一张 DIY 卡片，点开二选一
  // 弹窗（见 openDiyModal）——原来"传衣服/传人"两个左栏 tab 的入口并到
  // 这里，付费上传不受 myPending 限制（T48 只挡免费 pick）。
  const cardsHtml = wardrobe
    .map(
      (g) => `
      <div class="wardrobe-card${myPending ? " disabled" : ""}" data-garment="${g.id}">
        <div class="wardrobe-thumb">
          <img src="${escapeHtml(g.thumbnailUrl || g.imageUrl)}" />
          <div class="wardrobe-send-overlay">
            <button class="wardrobe-send-btn" type="button">发送</button>
          </div>
        </div>
        <div class="name">${escapeHtml(g.name)}</div>
      </div>`
    )
    .join("");
  const diyCardHtml = `
      <div class="wardrobe-card wardrobe-diy" id="diyCard">
        <div class="wardrobe-thumb wardrobe-diy-thumb">
          <span class="wardrobe-diy-icon">⬆️</span>
        </div>
        <div class="name">DIY 上传</div>
      </div>`;
  const pickHtml = wardrobe.length
    ? `<div class="wardrobe-strip-row">${cardsHtml}${diyCardHtml}</div>`
    : `<div class="wardrobe-strip-row">${diyCardHtml}</div>`;
  const generatingHtml = generating
    .map(
      (q) => `
      <div class="qrow">
        <div class="clip-row gen">
          <div class="prompt">👗 ${escapeHtml(garmentName(q.garmentId))}</div>
          <div class="meta">${q.nickname ? `${escapeHtml(q.nickname)} · ` : ""}生成中…</div>
        </div>
        <button class="up-btn ${q.voted ? "voted" : ""}" data-vote="${q.id}">▲<span>${q.votes || 0}</span></button>
      </div>`
    )
    .join("");
  const failedHtml = failed
    .map(
      (q) => `
      <div class="clip-row failed">
        <div class="prompt">👗 ${escapeHtml(garmentName(q.garmentId))}</div>
        <div class="meta">${q.nickname ? `${escapeHtml(q.nickname)} · ` : ""}❌ 生成失败</div>
      </div>`
    )
    .join("");

  pickPanel.innerHTML =
    (myPending ? `<div class="pending-hint">你已经有一件衣服在排队啦，播放后可以再选新的</div>` : "") +
    pickHtml +
    (generatingHtml ? `<div class="section-head">生成中（可点赞）</div>${generatingHtml}` : "") +
    (failedHtml ? `<div class="section-head">生成失败</div>${failedHtml}` : "");

  // T41: 桌面（真的有 hover）靠 CSS :hover 露出发送按钮，点缩略图本身不做
  // 任何事——只有点"发送"按钮才提交。移动端没有 hover，第一下点缩略图先
  // 露出按钮（同时收起其他已经露出的卡片），第二下点"发送"才真正提交。
  // ponytail: `.revealed` 是纯前端瞬时状态，下一次 pollState()（4s 一次）
  // 整个 pickPanel 会被重新渲染冲掉——移动端如果露出按钮后超过几秒没点，
  // 会自动收回去，需要重新点一下；这是"整块 innerHTML 重渲染"这个既有
  // 轮询模式的通用代价，不是这个任务单独引入的问题，真要根治得给整个
  // 轮询链路做增量 DOM diff，超出本任务范围。
  pickPanel.querySelectorAll(".wardrobe-card[data-garment]").forEach((card) => {
    card.querySelector(".wardrobe-send-btn").addEventListener("click", (e) => {
      e.stopPropagation();
      pickGarment(card.dataset.garment, card);
    });
    if (supportsHover) return;
    card.addEventListener("click", () => {
      if (card.classList.contains("revealed")) return;
      pickPanel.querySelectorAll(".wardrobe-card.revealed").forEach((c) => c.classList.remove("revealed"));
      card.classList.add("revealed");
    });
  });
  pickPanel.querySelectorAll("[data-vote]").forEach((btn) => btn.addEventListener("click", () => voteQueueItem(btn.dataset.vote, btn)));
  // T42: DIY 卡片直接开二选一弹窗，不走 hover/展开 + 发送那一套（点开就是
  // 弹窗，没有"先预览再确认"的必要），也不受 myPending 限制（付费上传）。
  const diyCard = document.getElementById("diyCard");
  if (diyCard) diyCard.addEventListener("click", openDiyModal);
}

// T40: 视频上方的排队头像条——只展示"生成中"（真正在等待播放的），已经
// 是 state.queue 里按票数排好序的同一份数据，不用再排一次序；每人一个
// 昵称首字哈希色块头像 + 右下角迷你服装缩略图角标。
function renderQueueStrip() {
  const waiting = ((lastState && lastState.queue) || []).filter((q) => q.status === "generating");
  queueStrip.hidden = waiting.length === 0;
  if (!waiting.length) return;
  queueStrip.innerHTML = waiting
    .map((q) => {
      const name = q.nickname || "";
      const initial = escapeHtml(name.trim().slice(0, 1) || "?");
      const img = garmentImage(q.garmentId);
      return `
    <div class="queue-avatar" title="${escapeHtml(name || "匿名")} · ${escapeHtml(garmentName(q.garmentId))}">
      <div class="queue-avatar-badge" style="background:${pastel(name)}">${initial}</div>
      ${img ? `<img class="queue-avatar-thumb" src="${escapeHtml(img)}" />` : ""}
    </div>`;
    })
    .join("");
}

async function voteQueueItem(id, btn) {
  const identity = await ensureIdentity();
  btn.disabled = true;
  try {
    const res = await fetch(`/api/dance/queue/vote/${id}`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ uid: identity.uid }),
    });
    if (!res.ok) return;
    const data = await res.json();
    btn.classList.toggle("voted", data.voted);
    btn.querySelector("span").textContent = data.votes;
  } finally {
    btn.disabled = false;
  }
}

// ---- 播放器：跟 live.html 一样，服务端 endAt 是权威时钟，轮询只是纠偏 ----
// T40: `nick` doubles as the empty-state message when there's nothing
// playing yet (pollState's "还没有可播放的内容…" call passes clip=null) —
// that call still shows the pill, just without the "🔥 正在换装" label
// (activeLabel only shows when there's an actual clip), same dual-purpose
// trick the old now-playing-box's np-nick span used.
function setNowPlaying(nick, clip) {
  activePill.hidden = !nick;
  activeLabel.hidden = !clip;
  activeNick.textContent = nick || "";
  nowPlayingBox.hidden = !clip;
  likeBtn.hidden = !clip;
  if (clip) {
    likeCount.textContent = clip.likes || 0;
    likeBtn.onclick = async () => {
      // 高清重绘: likes live on the content's root clip (clip.groupId), not
      // whichever resolution variant happens to be playing — otherwise a
      // clip's like count would appear to reset to 0 the moment an HD
      // version starts getting served (see joinClip in server.js).
      const res = await fetch(`/api/like/${clip.groupId || clip.id}`, { method: "POST" });
      if (res.ok) likeCount.textContent = (await res.json()).likes;
    };
  }
}

// A clip whose /lib/video request errors out (e.g. a transient 401/502 from
// the upstream H3 console) would otherwise just sit there frozen until the
// server-clock advanceTimer eventually fires — skip ahead immediately
// instead of leaving the room looking dead.
player.addEventListener("error", () => {
  if (player.currentSrc && currentClipId && player.currentSrc.endsWith(`/lib/video/${currentClipId}`) && upNextCache.length) {
    switchToClip(upNextCache[0], 0, upNextCache[0].requestedBy);
  }
});

// ---- curtain transition: close over the outgoing clip's last frame, swap
// src while hidden, open once the incoming clip actually has a frame ready
// (not just once src is set — that would flash the old frame behind an
// already-open curtain on browsers that keep painting it until new data
// arrives). ----
const curtain = document.getElementById("curtain");
function closeCurtain() {
  return new Promise((resolve) => {
    curtain.classList.add("closed");
    let done = false;
    const finish = () => {
      if (done) return;
      done = true;
      curtain.removeEventListener("transitionend", finish);
      resolve();
    };
    curtain.addEventListener("transitionend", finish, { once: true });
    setTimeout(finish, 700); // ponytail: fallback if transitionend never fires (e.g. backgrounded tab)
  });
}
function openCurtain() {
  curtain.classList.remove("closed");
}
function waitForFrame(video) {
  return new Promise((resolve) => {
    let done = false;
    const finish = () => {
      if (done) return;
      done = true;
      video.removeEventListener("playing", finish);
      video.removeEventListener("loadeddata", finish);
      resolve();
    };
    video.addEventListener("playing", finish, { once: true });
    video.addEventListener("loadeddata", finish, { once: true });
    // ponytail: caps how long the curtain stays shut waiting for a slow/failed
    // load — upgrade path if this fires often: show a spinner behind the curtain.
    setTimeout(finish, 800);
  });
}

let curtainGen = 0; // guards against a stale switch's waitForFrame() reopening a curtain a newer switch just closed
function switchToClip(clip, offsetSec, requestedBy) {
  const isFirstClip = currentClipId === null;
  currentClipId = clip.id;
  const gen = ++curtainGen;
  const applyClip = () => {
    player.src = `/lib/video/${clip.id}`;
    if (offsetSec > 0) {
      player.addEventListener(
        "loadedmetadata",
        () => {
          player.currentTime = Math.min(offsetSec, player.duration || offsetSec);
        },
        { once: true }
      );
    }
    tryPlay();
    setNowPlaying(requestedBy, clip);
    waitForFrame(player).then(() => {
      if (gen === curtainGen) openCurtain();
    });
  };
  if (isFirstClip) applyClip();
  else closeCurtain().then(applyClip);
}

async function pollState() {
  try {
    const identity = getIdentity();
    const res = await fetch(`/api/dance/live/state?characterId=${characterId}&cid=${clientId}${identity ? `&uid=${encodeURIComponent(identity.uid)}` : ""}`);
    if (res.status === 400) {
      // this character has no room (never had a video, or was removed) —
      // nothing to watch here.
      location.href = "dance-rooms.html";
      return;
    }
    const state = await res.json();
    lastState = state;
    watchingCount.hidden = false;
    watchingCount.textContent = `👀 ${state.watching}`;
    renderPickPanel();
    renderQueueStrip();
    renderQueueTab();
    upNextCache = state.upNext || [];

    clearTimeout(advanceTimer);
    if (state.current && state.current.clip) {
      if (state.current.clip.id !== currentClipId) {
        const offsetSec = Math.max(0, (state.now - state.current.startAt) / 1000);
        switchToClip(state.current.clip, offsetSec, state.current.requestedBy);
      }
      if (upNextCache.length) {
        const msUntilEnd = state.current.endAt - Date.now();
        advanceTimer = setTimeout(() => switchToClip(upNextCache[0], 0, upNextCache[0].requestedBy), Math.max(0, msUntilEnd));
      }
    } else if (!currentClipId) {
      setNowPlaying("还没有可播放的内容，去下面选一件衣服开播吧", null); // T42: 选衣服搬到底部横条了，原来写"右边"过时了
    }
  } catch {
    // transient — next poll retries
  }
}

// ---- T46: dance room 聊天，跟 live.html 的 pollChat/sendChat 同一套轮询
// 节奏（3s），走独立的 /api/dance/chat（按 characterId 隔离，不触发任何
// 生成任务，见 server.js pushDanceChatMessage 的注释）。 ----
function renderDanceChat(messages) {
  const atBottom = chatList.scrollHeight - chatList.scrollTop - chatList.clientHeight < 40;
  chatList.innerHTML = messages
    .map((m) => `<div class="chat-msg" style="background:${pastel(m.nickname)}"><b class="chat-nick">${escapeHtml(m.nickname)}</b><span class="chat-text">${escapeHtml(m.text)}</span></div>`)
    .join("");
  if (atBottom) chatList.scrollTop = chatList.scrollHeight;
}

async function pollDanceChat() {
  try {
    const res = await fetch(`/api/dance/chat?characterId=${characterId}&cid=${clientId}`);
    renderDanceChat(await res.json());
  } catch {
    // transient — next poll retries
  }
}

async function sendDanceChat() {
  const text = chatInput.value.trim();
  if (!text) return;
  const identity = await ensureIdentity();
  chatSendBtn.disabled = true;
  try {
    const res = await fetch("/api/dance/chat", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ characterId, uid: identity.uid, nickname: identity.nickname, text }),
    });
    const data = await res.json();
    if (res.status === 429) {
      chatHint.textContent = data.error;
      return;
    }
    chatInput.value = "";
    chatHint.textContent = data.status === "rejected" ? `未通过审核：${data.reason}` : "";
    pollDanceChat();
  } finally {
    chatSendBtn.disabled = false;
  }
}
chatSendBtn.addEventListener("click", sendDanceChat);
chatInput.addEventListener("keydown", (e) => {
  if (e.key === "Enter") sendDanceChat();
});

async function loadRoomInfo() {
  try {
    const rooms = await fetch("/api/dance/rooms").then((r) => r.json());
    const room = rooms.find((r) => r.id === characterId);
    if (room) {
      roomTitle.textContent = room.name;
      document.title = `${room.name} · 换装跳舞直播间`;
    }
  } catch {
    // cosmetic only — leave the generic title if this fails
  }
}

// T42: dance.html 不再有独立的"待播放/选衣服"移动端 tab 切换了——选衣服
// 现在是贴视频底部的横条（跟桌面端同一份 DOM/CSS），"待播放"列表在
// left-col 里常驻，两者在窄屏下都直接堆叠展示（见 live.css 的
// `@media (max-width:768px)` 规则，`.left-col` 本来就会掉到 player-col
// 下面）。移动端具体怎么收纳这条横条留给 T43 细化。
loadRoomInfo();
loadWardrobe();
pollState();
statePollTimer = setInterval(pollState, 4000);
pollDanceChat();
chatPollTimer = setInterval(pollDanceChat, 3000);
</script>
</body>
</html>