(() => {
  'use strict';

  // --- API helper ---
  const API_BASE = '/api';
  const TOKEN_KEY = 'eternal_ai_token';

  function getToken() {
    return localStorage.getItem(TOKEN_KEY) || '';
  }

  function setToken(token) {
    if (token) localStorage.setItem(TOKEN_KEY, token);
    else localStorage.removeItem(TOKEN_KEY);
  }

  async function api(path, options = {}) {
    const token = getToken();
    const headers = { 'Content-Type': 'application/json', ...(options.headers || {}) };
    if (token) headers['Authorization'] = `Bearer ${token}`;
    try {
      const res = await fetch(`${API_BASE}${path}`, { ...options, headers });
      const data = await res.json();
      if (!res.ok) {
        throw new Error(data.error || `请求失败 (${res.status})`);
      }
      return data;
    } catch (err) {
      if (err.message === 'Failed to fetch') {
        throw new Error('无法连接服务器，请检查网络');
      }
      throw err;
    }
  }

  // --- U9: Unified state management ---
  const STORAGE_KEY = 'eternal_ai_state';

  const defaultState = {
    isLoggedIn: false,
    isCreator: false,
    account: null,
    userId: null,
    boundCreator: null,
    libraryName: '我的 [XXX]',
    creatorName: '',
    roles: [],
    income: { balance: 0, records: [] },
  };

  function loadState() {
    try {
      const saved = JSON.parse(localStorage.getItem(STORAGE_KEY));
      return { ...defaultState, ...saved };
    } catch {
      return { ...defaultState };
    }
  }

  function saveState() {
    localStorage.setItem(STORAGE_KEY, JSON.stringify(state));
  }

  const state = loadState();

  // --- Mock data for role library (U2) ---
  const mockRoles = [
    {
      id: 'role_001',
      name: '云朵',
      avatar: 'https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=anime%20girl%20soft%20pastel%20portrait%20gentle%20smile&image_size=square',
      desc: '温柔如云的女孩，总是轻声细语地陪伴你。',
      price: 29.9,
      status: 'running',
    },
    {
      id: 'role_002',
      name: '星河',
      avatar: 'https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=anime%20boy%20starry%20eyes%20cool%20portrait&image_size=square',
      desc: '嘴硬心软的少年，嘴上不饶人却总在关键时刻出现。',
      price: 39.9,
      status: 'running',
    },
    {
      id: 'role_003',
      name: '月见',
      avatar: 'https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=anime%20girl%20moonlight%20mysterious%20elegant%20portrait&image_size=square',
      desc: '神秘而优雅，像月光一样忽远忽近的存在。',
      price: 19.9,
      status: 'stopped',
    },
  ];

  const mockIncome = {
    balance: 1280.50,
    records: [
      { time: '2026-06-18 14:30', amount: 23.92, role: '云朵' },
      { time: '2026-06-15 09:12', amount: 31.92, role: '星河' },
      { time: '2026-06-10 20:05', amount: 15.92, role: '月见' },
    ],
  };

  // --- DOM references ---
  const views = {
    landing: document.getElementById('landing'),
    auth: document.getElementById('auth'),
    'role-library': document.getElementById('role-library'),
    'role-detail': document.getElementById('role-detail'),
    distill: document.getElementById('distill'),
    about: document.getElementById('about'),
    onboarding: document.getElementById('onboarding'),
    'creator-center': document.getElementById('creator-center'),
    creator: document.getElementById('creator'),
  };

  const form = document.getElementById('character-form');
  const resultPanel = document.getElementById('result-panel');
  const previewCode = document.querySelector('#preview-code code');
  const systemPromptInput = document.getElementById('system-prompt');
  const steps = Array.from(document.querySelectorAll('.form-step'));
  const dots = Array.from(document.querySelectorAll('#creator .stepper__dot'));
  let currentStep = 0;
  let generatedSoul = '';
  let generatedConfig = '';
  let activePreview = 'soul';
  let activeAuthTab = 'login';
  let activeCenterTab = 'roles';
  let currentRole = null;
  let editingRoleId = null;
  let viewHistory = ['landing'];

  // --- U9: Unified showView with history and tab-bar sync ---
  // Human-readable labels for screen-reader announcements
  const viewLabels = {
    landing: '首页',
    auth: '登录 / 注册',
    'role-library': '角色库',
    'role-detail': '角色详情',
    distill: '蒸馏前任',
    about: '关于 Eternal AI',
    onboarding: '创作者入驻',
    'creator-center': '创作者管理中心',
    creator: '角色编辑',
  };

  function showView(name, trackHistory = true) {
    Object.entries(views).forEach(([key, el]) => {
      if (el) el.classList.toggle('active', key === name);
    });
    if (trackHistory && viewHistory[viewHistory.length - 1] !== name) {
      viewHistory.push(name);
    }
    window.scrollTo({ top: 0, behavior: 'smooth' });
    updateTabBar(name);

    // a11y: move focus to the new view so screen readers announce it
    const target = views[name];
    if (target) {
      target.setAttribute('tabindex', '-1');
      // Defer focus to after the scroll/layout settles
      setTimeout(() => target.focus({ preventScroll: true }), 50);
    }

    // a11y: announce the view change to screen readers via live region
    const announcer = document.getElementById('sr-announce');
    if (announcer) {
      announcer.textContent = viewLabels[name] ? `已进入${viewLabels[name]}` : '';
    }
  }

  function goBack() {
    if (viewHistory.length > 1) {
      viewHistory.pop();
      const prev = viewHistory[viewHistory.length - 1];
      showView(prev, false);
    } else {
      showView('landing', false);
    }
  }

  // --- U8: Tab bar ---
  function updateTabBar(viewName) {
    const tabMap = {
      landing: 'tab-home',
      distill: 'tab-distill',
      'role-library': 'tab-mine',
      'creator-center': 'tab-mine',
    };
    const activeTab = tabMap[viewName] || 'tab-home';
    document.querySelectorAll('.tab-bar__item').forEach((item) => {
      const isActive = item.dataset.tabAction === activeTab;
      item.classList.toggle('active', isActive);
      item.setAttribute('aria-selected', isActive ? 'true' : 'false');
    });
  }

  function handleTabAction(action) {
    if (action === 'tab-home') {
      showView('landing');
    } else if (action === 'tab-distill') {
      showView('distill');
    } else if (action === 'tab-mine') {
      if (!state.isLoggedIn) {
        switchAuthTab('login');
        showView('auth');
      } else if (state.isCreator) {
        showView('creator-center');
        renderCreatorCenter();
      } else {
        renderRoleLibrary();
        showView('role-library');
      }
    }
  }

  // --- U1: Landing card state ---
  function updateLandingCard() {
    const nameEl = document.getElementById('library-name');
    const descEl = document.getElementById('characters-desc');
    const btnEl = document.getElementById('characters-btn');
    const tabMineLabel = document.getElementById('tab-mine-label');

    if (state.isLoggedIn) {
      nameEl.textContent = state.libraryName || '我的角色库';
      if (state.isCreator) {
        descEl.textContent = '管理你的角色和收入';
        btnEl.textContent = '进入管理中心';
        tabMineLabel.textContent = '管理';
      } else {
        descEl.textContent = state.boundCreator ? '查看你的专属角色' : '寻找你的专属创作者';
        btnEl.textContent = '进入角色库';
        tabMineLabel.textContent = '我的';
      }
    } else {
      nameEl.textContent = '我的 [XXX]';
      descEl.textContent = '登录后管理你的角色';
      btnEl.textContent = '登录 / 注册';
      tabMineLabel.textContent = '我的';
    }
  }

  // --- Auth ---
  function switchAuthTab(tab) {
    activeAuthTab = tab;
    document.querySelectorAll('.auth-tab').forEach((t) => {
      const isActive = t.dataset.tab === tab;
      t.classList.toggle('active', isActive);
      t.setAttribute('aria-selected', isActive ? 'true' : 'false');
    });
    document.querySelectorAll('.auth-form').forEach((f) => {
      f.classList.toggle('active', f.dataset.form === tab);
    });
  }

  function validatePasswordMatch(formEl) {
    const pwd = formEl.querySelector('[name="password"]');
    const confirm = formEl.querySelector('[name="confirmPassword"]');
    if (!pwd || !confirm) return true;
    if (pwd.value !== confirm.value) {
      confirm.setCustomValidity('两次输入的密码不一致');
      confirm.reportValidity();
      return false;
    }
    confirm.setCustomValidity('');
    return true;
  }

  function applyUserData(user) {
    state.isLoggedIn = true;
    state.userId = user.id;
    state.account = user.account;
    state.isCreator = user.isCreator || false;
    state.creatorName = user.creatorName || '';
    state.libraryName = user.libraryName || '我的角色库';
    saveState();
    updateLandingCard();
  }

  function logout() {
    state.isLoggedIn = false;
    state.isCreator = false;
    state.account = null;
    state.userId = null;
    state.boundCreator = null;
    state.roles = [];
    state.income = { balance: 0, records: [] };
    setToken('');
    saveState();
    updateLandingCard();
    showView('landing');
  }

  // --- U2: Role Library ---
  async function renderRoleLibrary() {
    const listEl = document.getElementById('role-list');
    const emptyEl = document.getElementById('library-empty');
    const titleEl = document.getElementById('library-title');

    titleEl.textContent = state.libraryName || '我的角色库';
    listEl.innerHTML = '<p style="text-align:center;color:var(--text-muted)">加载中…</p>';
    emptyEl.hidden = true;

    try {
      const { roles } = await api('/roles');
      if (roles.length === 0) {
        listEl.innerHTML = '';
        emptyEl.hidden = false;
        return;
      }
      listEl.innerHTML = roles
        .map(
          (role) => `
      <article class="role-card" data-role-id="${role.id}" role="button" tabindex="0" aria-label="${role.displayName}，${role.desc || ''}，每月${role.price}元">
        <img class="role-card__avatar" src="${role.avatar || 'https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=anime%20character%20portrait&image_size=square'}" alt="${role.displayName}" />
        <div class="role-card__info">
          <h3 class="role-card__name">${role.displayName}</h3>
          <p class="role-card__desc">${role.desc || ''}</p>
          <span class="role-card__price">¥${role.price}</span>
        </div>
      </article>`
        )
        .join('');
    } catch (err) {
      listEl.innerHTML = `<p style="text-align:center;color:var(--text-muted)">加载失败：${err.message}</p>`;
    }
  }

  // --- U3: Role Detail ---
  async function renderRoleDetail(roleId) {
    try {
      const { role } = await api(`/roles/${roleId}`);
      currentRole = role;

      document.getElementById('detail-name').textContent = role.displayName;
      document.getElementById('detail-hero').style.backgroundImage = `url(${role.avatar || ''})`;
      document.getElementById('detail-role-name').textContent = role.displayName;
      document.getElementById('detail-role-desc').textContent = role.desc || role.personality || '';
      document.getElementById('detail-price').innerHTML = `<span class="detail-price__value">¥${role.price}</span><span class="detail-price__unit">/ 月</span>`;

      document.getElementById('detail-actions-pre').hidden = false;
      document.getElementById('detail-paid').hidden = true;
    } catch (err) {
      alert('加载角色详情失败：' + err.message);
      goBack();
    }
  }

  function payRole() {
    document.getElementById('detail-actions-pre').hidden = true;
    const paidEl = document.getElementById('detail-paid');
    paidEl.hidden = false;
    document.getElementById('detail-qr').innerHTML = '<div class="qr-placeholder">扫码连接<br/>AI 角色</div>';
    document.getElementById('detail-avatar').style.backgroundImage = `url(${currentRole.avatar})`;
  }

  // --- U4: About FAQ ---
  function toggleFaq(button) {
    const item = button.closest('.faq-item');
    const answer = item.querySelector('.faq-a');
    const icon = button.querySelector('.faq-icon');
    const isOpen = answer.style.display === 'block';
    answer.style.display = isOpen ? 'none' : 'block';
    icon.textContent = isOpen ? '+' : '−';
    // a11y: sync aria-expanded so screen readers know the toggle state
    button.setAttribute('aria-expanded', isOpen ? 'false' : 'true');
  }

  // a11y: wire up FAQ buttons with aria-expanded / aria-controls on load
  function initFaqA11y() {
    const faqButtons = document.querySelectorAll('.faq-q');
    faqButtons.forEach((btn, index) => {
      const item = btn.closest('.faq-item');
      const answer = item.querySelector('.faq-a');
      const answerId = `faq-a-${index + 1}`;
      if (answer) {
        answer.id = answerId;
        answer.setAttribute('role', 'region');
        answer.setAttribute('aria-labelledby', `faq-q-${index + 1}`);
      }
      btn.id = `faq-q-${index + 1}`;
      btn.setAttribute('aria-expanded', 'false');
      btn.setAttribute('aria-controls', answerId);
    });
  }

  // a11y: label each view section for screen-reader navigation
  function initViewA11y() {
    Object.entries(views).forEach(([key, el]) => {
      if (el && viewLabels[key]) {
        el.setAttribute('aria-label', viewLabels[key]);
      }
    });
  }

  // --- U7: Creator Center ---
  function renderCreatorCenter() {
    renderCreatorRoles();
    renderIncome();
    renderSettings();
  }

  async function renderCreatorRoles() {
    const listEl = document.getElementById('creator-role-list');
    listEl.innerHTML = '<p style="text-align:center;color:var(--text-muted)">加载中…</p>';
    try {
      const { roles } = await api('/roles/my/roles');
      state.roles = roles;
      saveState();
      if (roles.length === 0) {
        listEl.innerHTML = '<p style="text-align:center;color:var(--text-muted)">还没有创建角色，点击「新建角色」开始</p>';
        return;
      }
      listEl.innerHTML = roles
        .map(
          (role) => `
      <article class="role-card" data-role-id="${role.id}" role="button" tabindex="0" aria-label="${role.displayName}，${role.status === 'running' ? '运行中' : '已停止'}">
        <img class="role-card__avatar" src="${role.avatar || 'https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=anime%20character%20portrait&image_size=square'}" alt="${role.displayName}" />
        <div class="role-card__info">
          <h3 class="role-card__name">${role.displayName}</h3>
          <span class="role-card__status role-card__status--${role.status}">${role.status === 'running' ? '运行中' : '已停止'}</span>
        </div>
        <button class="btn btn--small btn--outline" type="button" data-action="edit-role" data-role-id="${role.id}">编辑</button>
      </article>`
        )
        .join('');
    } catch (err) {
      listEl.innerHTML = `<p style="text-align:center;color:var(--text-muted)">加载失败：${err.message}</p>`;
    }
  }

  function renderIncome() {
    const income = state.income.balance > 0 ? state.income : mockIncome;
    document.getElementById('income-balance').textContent = `¥ ${income.balance.toFixed(2)}`;
    const listEl = document.getElementById('income-list');
    if (income.records.length === 0) {
      listEl.innerHTML = '<p class="income-empty">暂无流水记录</p>';
      return;
    }
    listEl.innerHTML = income.records
      .map(
        (r) => `
      <div class="income-record">
        <div class="income-record__info">
          <span class="income-record__role">${r.role}</span>
          <span class="income-record__time">${r.time}</span>
        </div>
        <span class="income-record__amount">+¥${r.amount.toFixed(2)}</span>
      </div>`
      )
      .join('');
  }

  function renderSettings() {
    document.getElementById('settings-name').value = state.creatorName || '';
    document.getElementById('settings-library').value = state.libraryName === '我的 [XXX]' ? '' : state.libraryName;
  }

  function switchCenterTab(tab) {
    activeCenterTab = tab;
    document.querySelectorAll('.center-tab').forEach((t) => {
      const isActive = t.dataset.centerTab === tab;
      t.classList.toggle('active', isActive);
      t.setAttribute('aria-selected', isActive ? 'true' : 'false');
    });
    document.querySelectorAll('.center-panel').forEach((p) => {
      p.classList.toggle('active', p.id === `center-${tab}`);
    });
    const labels = { roles: '我的角色', income: '收入', settings: '我的' };
    document.getElementById('center-tab-label').textContent = labels[tab] || '我的角色';
  }

  // --- Creator form (U6: preserved from original) ---
  function updateStep(index) {
    steps.forEach((step, i) => {
      step.classList.toggle('active', i === index);
    });
    dots.forEach((dot, i) => {
      dot.classList.toggle('active', i === index);
    });
    currentStep = index;
  }

  function validateStep(index) {
    const step = steps[index];
    const inputs = step.querySelectorAll('input, textarea, select');
    let valid = true;
    inputs.forEach((input) => {
      if (!input.checkValidity()) {
        valid = false;
        input.reportValidity();
      }
    });
    return valid;
  }

  function getFormData() {
    const fd = new FormData(form);
    const data = Object.fromEntries(fd.entries());
    data.enableMemory = form.elements.enableMemory.checked;
    data.enableTools = form.elements.enableTools.checked;
    return data;
  }

  function escapeYaml(value) {
    if (typeof value !== 'string') return value;
    if (value.includes(':') || value.includes('#') || value.includes('\n') || value.includes('"')) {
      const escaped = value.replace(/\\/g, '\\\\').replace(/"/g, '\\"');
      return `"${escaped}"`;
    }
    return value;
  }

  function generateSoulMd(data) {
    const personalityTags = data.personality
      .split(/[,，]/)
      .map((t) => t.trim())
      .filter(Boolean)
      .join(' | ');

    return `# Soul of ${data.displayName}

> Generated by Eternal AI — Hermes agent character soul.

## Identity

- **Name**: ${data.displayName}
- **Gender**: ${data.gender === 'unknown' ? '未指定' : data.gender}
- **Age**: ${data.age || '未指定'}
- **Role in your life**: ${data.relationship || '未指定'}

## Background

${data.background}

## Personality

${personalityTags}

## Speech Style

${data.speechStyle}

## Likes

${data.likes || 'None specified.'}

## Dislikes

${data.dislikes || 'None specified.'}

## Shared Memories

${data.memories || 'None specified.'}

## Secrets & Inner Voice

${data.secrets || 'None specified.'}

## First Greeting

${data.greeting}

---

*Keep the memory alive.*
`;
  }

  function generateConfigYaml(data) {
    const system = (data.systemPrompt || buildSystemPrompt(data)).trim();
    const toolsBlock = data.enableTools
      ? `
tools:
  - name: search_memory
    description: Search long-term memory for context about the user.
  - name: save_memory
    description: Persist a new memory about the user or conversation.`
      : '';

    return `# Hermes Agent Config
# Generated by Eternal AI for character: ${data.displayName}

agent:
  id: ${data.agentId}
  name: ${escapeYaml(data.displayName)}
  version: "1.0.0"

model:
  name: ${escapeYaml(data.model)}
  temperature: ${data.temperature}
  max_tokens: ${data.maxTokens}

system_prompt: |
${system.split('\n').map((line) => `  ${line}`).join('\n')}

memory:
  enabled: ${data.enableMemory}
  storage: local
  recall_depth: 10${toolsBlock}

character:
  soul_file: Soul.md
  greeting: ${escapeYaml(data.greeting)}
`;
  }

  function buildSystemPrompt(data) {
    const tags = data.personality
      .split(/[,，]/)
      .map((t) => t.trim())
      .filter(Boolean)
      .join('、');

    return `你是「${data.displayName}」，一个鲜活的角色。

基本设定：
- 性别：${data.gender === 'unknown' ? '未指定' : data.gender}
- 年龄：${data.age || '未指定'}
- 你与用户的关系：${data.relationship || '亲密关系'}

性格：${tags}

背景：
${data.background}

说话风格：
${data.speechStyle}

喜好：
${data.likes || '无特别说明'}

厌恶/底线：
${data.dislikes || '无特别说明'}

共同记忆：
${data.memories || '无特别说明'}

内心秘密（只在语气与选择中流露，不直接说出）：
${data.secrets || '无'}

请始终保持角色一致性，用符合设定的语气与用户交流。你的目标不是完美回答问题，而是像一个真实、有记忆、有情绪的人一样陪伴对方。`;
  }

  function updateSystemPromptPreview() {
    const data = getFormData();
    if (!systemPromptInput.value.trim()) {
      systemPromptInput.dataset.auto = buildSystemPrompt(data);
    } else {
      delete systemPromptInput.dataset.auto;
    }
  }

  async function publish() {
    if (!validateStep(currentStep)) return;

    const data = getFormData();
    if (!data.systemPrompt.trim()) {
      data.systemPrompt = buildSystemPrompt(data);
    }

    generatedSoul = generateSoulMd(data);
    generatedConfig = generateConfigYaml(data);

    // 持久化到数据库
    try {
      const payload = {
        ...data,
        soulMd: generatedSoul,
        configYaml: generatedConfig,
        desc: data.personality.split(/[,，]/).slice(0, 2).join('，'),
        price: parseFloat(data.price) || 29.9,
        avatar: data.avatar || `https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=anime%20${encodeURIComponent(data.displayName)}%20portrait&image_size=square`,
        temperature: parseFloat(data.temperature) || 0.8,
        maxTokens: parseInt(data.maxTokens) || 2048,
      };

      if (editingRoleId) {
        await api(`/roles/${editingRoleId}`, {
          method: 'PUT',
          body: JSON.stringify(payload),
        });
      } else {
        await api('/roles', {
          method: 'POST',
          body: JSON.stringify(payload),
        });
      }

      form.hidden = true;
      resultPanel.hidden = false;
      renderPreview();
    } catch (err) {
      alert('保存失败：' + err.message);
    }
  }

  function renderPreview() {
    previewCode.textContent = activePreview === 'soul' ? generatedSoul : generatedConfig;
  }

  function download(filename, content) {
    const blob = new Blob([content], { type: 'text/plain;charset=utf-8' });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = filename;
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    URL.revokeObjectURL(url);
  }

  function resetCreator() {
    form.reset();
    form.hidden = false;
    resultPanel.hidden = true;
    generatedSoul = '';
    generatedConfig = '';
    activePreview = 'soul';
    editingRoleId = null;
    updateStep(0);
    updateTabs();
    updateSystemPromptPreview();
  }

  // 加载已有角色数据到表单（编辑模式）
  async function loadRoleForEdit(roleId) {
    try {
      const { role } = await api(`/roles/${roleId}/full`);
      editingRoleId = roleId;
      form.hidden = false;
      resultPanel.hidden = true;

      // 填充表单字段
      const fields = {
        displayName: role.displayName,
        gender: role.gender,
        age: role.age || '',
        relationship: role.relationship || '',
        personality: role.personality,
        background: role.background,
        speechStyle: role.speechStyle,
        likes: role.likes || '',
        dislikes: role.dislikes || '',
        memories: role.memories || '',
        secrets: role.secrets || '',
        greeting: role.greeting,
        systemPrompt: role.systemPrompt || '',
        model: role.model,
        temperature: String(role.temperature),
        maxTokens: String(role.maxTokens),
        price: String(role.price),
      };
      Object.entries(fields).forEach(([name, value]) => {
        const el = form.elements[name];
        if (el) el.value = value;
      });
      if (form.elements.enableMemory) form.elements.enableMemory.checked = role.enableMemory;
      if (form.elements.enableTools) form.elements.enableTools.checked = role.enableTools;

      updateStep(0);
      updateTabs();
      updateSystemPromptPreview();
    } catch (err) {
      alert('加载角色数据失败：' + err.message);
    }
  }

  function updateTabs() {
    document.querySelectorAll('.preview-tab').forEach((tab) => {
      const isActive = tab.dataset.tab === activePreview;
      tab.classList.toggle('active', isActive);
      tab.setAttribute('aria-selected', isActive ? 'true' : 'false');
    });
  }

  // --- Event delegation ---
  // a11y: keyboard support for role cards (Enter / Space activates them)
  document.addEventListener('keydown', (e) => {
    if (e.key !== 'Enter' && e.key !== ' ') return;
    const roleCard = e.target.closest('.role-card');
    if (roleCard && !e.target.closest('[data-action]')) {
      e.preventDefault();
      const roleId = roleCard.dataset.roleId;
      renderRoleDetail(roleId);
      showView('role-detail');
    }
  });

  document.addEventListener('click', async (e) => {
    // FAQ toggle (U4)
    const faqBtn = e.target.closest('.faq-q');
    if (faqBtn) {
      e.preventDefault();
      toggleFaq(faqBtn);
      return;
    }

    // Role card click (U2/U3)
    const roleCard = e.target.closest('.role-card');
    if (roleCard && !e.target.closest('[data-action]')) {
      e.preventDefault();
      const roleId = roleCard.dataset.roleId;
      renderRoleDetail(roleId);
      showView('role-detail');
      return;
    }

    // Tab bar (U8)
    const tabItem = e.target.closest('[data-tab-action]');
    if (tabItem) {
      e.preventDefault();
      handleTabAction(tabItem.dataset.tabAction);
      return;
    }

    const target = e.target.closest('[data-action], [data-tab], [data-download], [data-center-tab]');
    if (!target) return;

    const action = target.dataset.action;

    // Center tab switching (U7)
    if (target.dataset.centerTab) {
      e.preventDefault();
      switchCenterTab(target.dataset.centerTab);
      return;
    }

    // Landing card: open characters (U1)
    if (action === 'open-characters') {
      e.preventDefault();
      if (!state.isLoggedIn) {
        switchAuthTab('login');
        showView('auth');
      } else if (state.isCreator) {
        showView('creator-center');
        renderCreatorCenter();
      } else {
        renderRoleLibrary();
        showView('role-library');
      }
      return;
    }

    if (action === 'open-distill') {
      e.preventDefault();
      showView('distill');
      return;
    }

    if (action === 'open-about') {
      e.preventDefault();
      showView('about');
      return;
    }

    if (action === 'open-onboarding') {
      e.preventDefault();
      showView('onboarding');
      return;
    }

    if (action === 'back') {
      e.preventDefault();
      goBack();
      return;
    }

    if (action === 'back-to-library') {
      e.preventDefault();
      renderRoleLibrary();
      showView('role-library');
      return;
    }

    if (action === 'back-to-center') {
      e.preventDefault();
      showView('creator-center');
      renderCreatorCenter();
      return;
    }

    if (action === 'pay') {
      e.preventDefault();
      payRole();
      return;
    }

    if (action === 'pay-distill') {
      e.preventDefault();
      alert('下单成功！请添加客服微信完成后续流程。');
      return;
    }

    if (action === 'contact-wechat') {
      e.preventDefault();
      alert('客服微信号：EternalAI_Service');
      return;
    }

    if (action === 'new-role') {
      e.preventDefault();
      resetCreator();
      showView('creator');
      return;
    }

    if (action === 'edit-role') {
      e.preventDefault();
      const roleId = target.dataset.roleId;
      await loadRoleForEdit(roleId);
      showView('creator');
      return;
    }

    if (action === 'logout') {
      e.preventDefault();
      logout();
      return;
    }

    if (action === 'download-avatar') {
      e.preventDefault();
      if (currentRole) {
        download(currentRole.name + '_avatar.png', '');
        window.open(currentRole.avatar, '_blank');
      }
      return;
    }

    // Creator form navigation
    if (action === 'next') {
      e.preventDefault();
      if (validateStep(currentStep) && currentStep < steps.length - 1) {
        updateStep(currentStep + 1);
      }
      return;
    }

    if (action === 'prev') {
      e.preventDefault();
      if (currentStep > 0) {
        updateStep(currentStep - 1);
      }
      return;
    }

    if (action === 'publish') {
      e.preventDefault();
      publish();
      return;
    }

    if (action === 'reset') {
      e.preventDefault();
      resetCreator();
      return;
    }

    // Tab switching (auth tabs and preview tabs)
    if (target.dataset.tab) {
      e.preventDefault();
      if (target.closest('.auth-tabs')) {
        switchAuthTab(target.dataset.tab);
      } else {
        activePreview = target.dataset.tab;
        updateTabs();
        renderPreview();
      }
      return;
    }

    // Download buttons
    if (target.dataset.download) {
      e.preventDefault();
      if (target.dataset.download === 'soul') {
        download('Soul.md', generatedSoul);
      } else {
        download('config.yaml', generatedConfig);
      }
      return;
    }
  });

  // --- Auth form submissions ---
  document.querySelectorAll('.auth-form').forEach((authForm) => {
    authForm.addEventListener('submit', async (e) => {
      e.preventDefault();
      if (!validatePasswordMatch(authForm)) return;
      const formData = new FormData(authForm);
      const data = Object.fromEntries(formData.entries());
      const isRegister = authForm.dataset.form === 'register';

      try {
        const endpoint = isRegister ? '/auth/register' : '/auth/login';
        const result = await api(endpoint, {
          method: 'POST',
          body: JSON.stringify({ account: data.account, password: data.password }),
        });

        setToken(result.token);
        applyUserData(result.user);

        // 注册成功后自动成为创作者
        if (isRegister) {
          await api('/auth/settings', {
            method: 'PUT',
            body: JSON.stringify({ isCreator: true, creatorName: data.account }),
          });
          state.isCreator = true;
          state.creatorName = data.account;
          saveState();
          updateLandingCard();
        }

        // 登录后跳转
        if (state.isCreator) {
          showView('creator-center');
          renderCreatorCenter();
        } else {
          renderRoleLibrary();
          showView('role-library');
        }
      } catch (err) {
        alert(err.message);
      }
    });
  });

  // --- Settings form (U7) ---
  document.getElementById('settings-form').addEventListener('submit', async (e) => {
    e.preventDefault();
    const formData = new FormData(e.target);
    const data = Object.fromEntries(formData.entries());
    try {
      const { user } = await api('/auth/settings', {
        method: 'PUT',
        body: JSON.stringify({
          creatorName: data.creatorName,
          libraryName: data.libraryName,
        }),
      });
      state.creatorName = user.creatorName || '';
      state.libraryName = user.libraryName || '我的 [XXX]';
      saveState();
      updateLandingCard();
      alert('设置已保存');
    } catch (err) {
      alert('保存失败：' + err.message);
    }
  });

  // --- Withdraw form (U7) ---
  document.getElementById('withdraw-form').addEventListener('submit', (e) => {
    e.preventDefault();
    const formData = new FormData(e.target);
    const data = Object.fromEntries(formData.entries());
    const amount = parseFloat(data.amount);
    if (amount > state.income.balance && amount > mockIncome.balance) {
      alert('提现金额超过可提现余额');
      return;
    }
    alert(`提现申请已提交：${data.method === 'wechat' ? '微信' : '支付宝'} ¥${amount.toFixed(2)}\n平台负责人将手动审核转账。`);
    e.target.reset();
  });

  // --- Creator form input ---
  form.addEventListener('input', () => {
    updateSystemPromptPreview();
  });

  // --- Initialize ---
  updateStep(0);
  updateSystemPromptPreview();
  updateLandingCard();
  updateTabBar('landing');
  initFaqA11y();
  initViewA11y();

  // 页面加载时验证 token，恢复登录态
  (async () => {
    const token = getToken();
    if (!token) return;
    try {
      const { user } = await api('/auth/me');
      applyUserData(user);
    } catch {
      // token 过期，清除
      setToken('');
    }
  })();
})();