diff --git a/src/genesis/server/static/chat.js b/src/genesis/server/static/chat.js
index 54620a2..cb0e825 100644
--- a/src/genesis/server/static/chat.js
+++ b/src/genesis/server/static/chat.js
@@ -1,686 +1,720 @@
 // src/genesis/server/static/chat.js
-// Genesis Chat UI 涓氬姟閫昏緫锛坴1 鎷嗗垎鑷師 chat.html 鍐呰仈 <script> 娈碉紝琛?510-1179锛塦n// 涓婁竴杞?chat.html 鎷嗗垎 CSS 鏃惰鍒犳暣娈靛唴鑱?JS锛屽鑷存墍鏈?UI 鎸夐挳澶辨晥
-// 鏈瀹屾暣鎭㈠锛岄浂琛屼负鍙樻洿
-let sid = null;
-let progressWs = null;
-let draftProject = null;     // 涓嬩竴绌虹櫧浼氳瘽灏嗙粦瀹?宸茬粦鐨勯」鐩紙鍘?currentProject锛?let activeProject = null;    // 褰撳墠宸茶惤搴撲細璇濈粦瀹氱殑椤圭洰锛堟潵鑷悗绔級
-let projects = [];
-let drawerOpen = false;
-let drawerSelected = null;   // 褰撳墠鎶藉眽涓紪杈戠殑椤圭洰鍚嶏紙null = 鏂板缓妯″紡锛?let lastTriggerEl = null;    // 鎵撳紑鎶藉眽/涓嬫媺鍓嶇殑鐒︾偣鍏冪礌锛圕1锛?let drawerDirty = false;     // 鎶藉眽琛ㄥ崟鏄惁鏈夋湭淇濆瓨鏀瑰姩锛圔6锛?  let drawerSnapshot = null;   // loadDrawerForm 鏃剁殑瀛楁蹇収锛圔6锛?
-// 鐘舵€侀€昏緫缁熶竴璧?chat_state.js锛涜嫢闈欐€佽矾鐢辨湭灏辩华鍒欏洖閫€鍐呰仈瀹炵幇锛岄伩鍏嶆暣椤佃剼鏈穿婧?const GenesisState = window.GenesisState || {
-  autoBindProject: (d, p) => (d === null && p.length ? p[0].name : (d && !p.find(x => x.name === d) ? (p.length ? p[0].name : null) : d)),
-  shouldHideUploadSelect: () => false,
-  resolveUploadType: (_a, _d, v) => v,
-  computeDrawerSnapshot: (f) => f.map(x => (x == null ? '' : String(x)).trim()).join(String.fromCharCode(1)),
-  isDrawerDirty: (n, s) => n !== s,
-  buildWelcome: (d) => d === null ? '璇锋柊寤洪」鐩垨鑰呴€夋嫨椤圭洰'
-    : '浣犲ソ锛佹垜鏄?Genesis 姒傝璁捐涔︾敓鎴?Agent銆傝鍏堜笂浼犺浠跺畾涔?xlsx锛堟ā鏉?瑙勫垯/浠ｇ爜搴撳凡鐢遍」鐩€? + d + '銆嶆彁渚涳級銆?,
-};
-
-const chatEl = document.getElementById('chat');
-const inputEl = document.getElementById('input');
-const sendBtn = document.getElementById('send');
-const badge = document.getElementById('sid-badge');
-const psMenu = document.getElementById('ps-menu');
-const psName = document.getElementById('ps-name');
-const drawer = document.getElementById('proj-drawer');
-
-function addMsg(role, html) {
-  const m = document.createElement('div');
-  m.className = 'msg ' + role;
-  m.innerHTML = '<div class="bubble">' + html + '</div>';
-  chatEl.appendChild(m);
-  chatEl.scrollTop = chatEl.scrollHeight;
-  return m;
-}
-function esc(s) { return String(s).replace(/[&<>"']/g, c => ({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[c])); }
-function showTyping() { return addMsg('assistant', '<span class="typing">鎬濊€冧腑鈥?/span>'); }
-
-async function api(method, url, body) {
-  const opt = { method, headers: {} };
-  if (body !== undefined) { opt.headers['Content-Type'] = 'application/json'; opt.body = JSON.stringify(body); }
-  const r = await fetch(url, opt);
-  const data = await r.json().catch(() => ({}));
-  if (!r.ok) throw new Error(data.detail?.message || r.status);
-  return data;
-}
-
-// ---------- 浼氳瘽鍒楄〃 ----------
-async function refreshSessions() {
-  const box = document.getElementById('session-list');
-  if (draftProject === null) { box.innerHTML = ''; return; }  // 鏈€夐」鐩?鈫?鏃犲巻鍙?  const list = await api('GET', '/api/sessions?user_id=default&project=' + encodeURIComponent(draftProject));
-  box.innerHTML = '';
-  list.sort((a, b) => (b.updated_at || '').localeCompare(a.updated_at || ''));
-  for (const s of list) {
-    const el = document.createElement('div');
-    el.className = 'sess' + (s.session_id === sid ? ' active' : '');
-    const proj = s.project ? ' 路 ' + esc(s.project) : '';
-    // P3鈥?锛氬彇棣栧瓧绗︼紙鍚腑鏂?鏃ユ枃/鑻辨枃锛変綔 avatar锛屽苟鐢ㄥ悕瀛?hash 閫夎壊锛岄伩鍏嶉噸鍚嶆贩娣?    const rawName = (s.name || '鏂?).trim();
-    const avatar = rawName ? Array.from(rawName)[0] : '鏂?;
-    const palette = ['#1a73e8', '#34a853', '#fbbc05', '#ea4335', '#8e24aa', '#0097a7', '#5f6368'];
-    let h = 0;
-    for (let i = 0; i < rawName.length; i++) h = (h * 31 + rawName.charCodeAt(i)) | 0;
-    const color = palette[Math.abs(h) % palette.length];
-    el.innerHTML =
-      '<div class="avatar" style="background:' + color + ';">' + esc(avatar) + '</div>' +
-      '<div class="info">' +
-        '<div class="name">' + esc(s.name || '鏂颁細璇?) + '</div>' +
-        '<div class="meta">' + esc(s.status) + proj + '</div>' +
-      '</div>' +
-      '<button class="del" title="鍒犻櫎浼氳瘽" aria-label="鍒犻櫎浼氳瘽 ' + esc(rawName) + '">脳</button>';
-    el.querySelector('.info').onclick = () => loadSession(s.session_id);
-    const delBtn = el.querySelector('.del');
-    delBtn.onclick = (ev) => { ev.stopPropagation(); deleteSession(s.session_id); };
-    box.appendChild(el);
-  }
-}
-
-async function deleteSession(targetSid) {
-  if (!confirm('纭鍒犻櫎璇ヤ細璇濓紵姝ゆ搷浣滀笉鍙挙閿€銆?)) return;
-  try {
-    await api('DELETE', '/api/sessions/' + encodeURIComponent(targetSid));
-  } catch (e) {
-    addMsg('error', '鍒犻櫎澶辫触锛? + esc(String(e)));
-    return;
-  }
-  if (targetSid === sid) {
-    // 鍒犻櫎鐨勬槸褰撳墠浼氳瘽 鈫?鑷姩鏂板缓骞舵竻绌?    await newSession();
-  } else {
-    await refreshSessions();
-  }
-}
-
-// ---------- 椤圭洰閰嶇疆 ----------
-async function loadProjects() {
-  try {
-    projects = await api('GET', '/api/projects');
-  } catch (e) {
-    projects = [];
-  }
-  // 鍚姩鑷姩缁戦椤?/ 宸插垹椤圭洰鍥為€€棣栭」锛堢粺涓€鐢?GenesisState.autoBindProject 澶勭悊锛?  draftProject = GenesisState.autoBindProject(draftProject, projects);
-  applyProjectContext();
-  renderProjectSwitcher();
-  renderDrawerList();
-  if (drawerOpen) loadDrawerForm(drawerSelected);
-}
-
-function applyProjectContext() {
-  psName.textContent = draftProject || '鏈€夋嫨';
-}
-
-function renderProjectSwitcher() {
-  let html = '<div class="ps-item' + (draftProject === null ? ' active' : '') + '" data-name="">'
-    + '<span>涓嶉€夋嫨椤圭洰</span><span class="ps-check">鉁?/span></div>';
-  for (const p of projects) {
-    html += '<div class="ps-item' + (p.name === draftProject ? ' active' : '') + '" data-name="' + esc(p.name) + '">'
-      + '<span>' + esc(p.display_name || p.name) + '</span><span class="ps-check">鉁?/span></div>';
-  }
-  html += '<div class="ps-sep"></div>'
-    + '<div class="ps-item ps-manage" data-manage="1">+ 椤圭洰绠＄悊锛堟墦寮€鎶藉眽锛?/div>';
-  psMenu.innerHTML = html;
-  psMenu.querySelectorAll('.ps-item[data-name]').forEach(it => {
-    it.onclick = () => {
-      if (!guardDrawerDirty()) return;
-      draftProject = it.dataset.name === '' ? null : it.dataset.name;
-      applyProjectContext();
-      renderProjectSwitcher();
-      updateUploadBar();
-      toggleProjectSwitcher(false);
-    };
-  });
-  psMenu.querySelectorAll('.ps-item[data-manage]').forEach(it => {
-    it.onclick = () => {
-      if (!guardDrawerDirty()) return;
-      lastTriggerEl = it;
-      toggleProjectSwitcher(false);
-      openProjectDrawer(drawerSelected);
-    };
-  });
-}
-
-function toggleProjectSwitcher(force) {
-  const willOpen = force === undefined ? !psMenu.classList.contains('open') : !!force;
-  psMenu.classList.toggle('open', willOpen);
-}
-
-// ---------- 鎶藉眽 ----------
-function openProjectDrawer(projectName) {
-  drawerOpen = true;
-  toggleProjectSwitcher(false);
-  drawer.classList.add('open');
-  const sel = (projectName === undefined || projectName === null) ? drawerSelected : projectName;
-  try { loadDrawerForm(sel); } catch (e) { console.error(e); }
-  renderDrawerList();   // 濮嬬粓娓叉煋宸︿晶鍒楄〃锛堝惈 +鏂板缓椤圭洰锛?}
-
-function closeProjectDrawer() {
-  if (!guardDrawerDirty()) return;
-  drawerOpen = false;
-  drawer.classList.remove('open');
-}
-
-function loadDrawerForm(projectName) {
-  drawerSelected = (projectName === undefined) ? drawerSelected : projectName;
-  const nameEl = document.getElementById('pf-name');
-  const dispEl = document.getElementById('pf-display');
-  const tplEl = document.getElementById('pf-template');
-  const wrEl = document.getElementById('pf-write');
-  const rulesEl = document.getElementById('pf-rules');
-  const codeEl = document.getElementById('pf-code');
-  const designEl = document.getElementById('pf-design');
-  const delBtn = document.getElementById('pf-delete');
-  if (drawerSelected) {
-    const p = projects.find(x => x.name === drawerSelected);
-    if (p) {
-      nameEl.value = p.name; nameEl.readOnly = true;
-      dispEl.value = p.display_name || '';
-      tplEl.value = p.template || '';
-      wrEl.value = p.write_instruction || '';
-      rulesEl.value = (p.rules || []).join(', ');
-      codeEl.value = p.existing_system_code_dir || '';
-      designEl.value = p.design_docs_dir || '';
-      delBtn.hidden = false;
-    }
-  } else {
-    nameEl.value = ''; nameEl.readOnly = false;
-    dispEl.value = '';
-    tplEl.value = ''; wrEl.value = ''; rulesEl.value = ''; codeEl.value = ''; designEl.value = '';
-    delBtn.hidden = true;
-  }
-  // B6锛氳褰曞瓧娈靛揩鐓х敤浜庤剰妫€娴?  drawerSnapshot = drawerSnapshotNow();
-  renderDrawerList();
-}
-
-// B6锛氭娊灞夋湭淇濆瓨鍙樻洿瀹堝崼
-function drawerSnapshotNow() {
-  return GenesisState.computeDrawerSnapshot([
-    document.getElementById('pf-name').value,
-    document.getElementById('pf-display').value,
-    document.getElementById('pf-template').value,
-    document.getElementById('pf-write').value,
-    document.getElementById('pf-rules').value,
-    document.getElementById('pf-code').value,
-    document.getElementById('pf-design').value,
-  ]);
-}
-function isDrawerDirty() {
-  if (!drawerOpen || drawerSnapshot === null) return false;
-  return GenesisState.isDrawerDirty(drawerSnapshotNow(), drawerSnapshot);
-}
-function guardDrawerDirty() {
-  if (isDrawerDirty()) return confirm('鏈夋湭淇濆瓨鐨勪慨鏀癸紝纭畾鏀惧純锛?);
-  return true;
-}
-
-// P0鈥慍锛氭娊灞夊瓧娈电骇绾㈡銆傚懡涓叧閿瓧 鈫?缁欏搴旇緭鍏ュ姞 .invalid 3 绉掑悗娓呴櫎銆?// 鍏抽敭瀛椾笌 store.py 鐨?ProjectConfigError 涓枃 label 瀵归綈銆?const PF_LABEL_TO_FIELD = {
-  '椤圭洰鍚?: 'pf-name',
-  '妯℃澘': 'pf-template',
-  '鍋氭垚璇存槑涔?: 'pf-write',
-  '瑙勫垯': 'pf-rules',
-  '鏃㈡湁绯荤粺浠ｇ爜搴?: 'pf-code',
-  '鏃㈡湁璁捐鏂囨。鐩綍': 'pf-design',
-};
-function clearPfInvalid() {
-  ['pf-name','pf-display','pf-template','pf-write','pf-rules','pf-code','pf-design']
-    .forEach(id => document.getElementById(id).classList.remove('invalid'));
-}
-function flagPfInvalidByMessage(message) {
-  if (!message) return;
-  for (const [label, fid] of Object.entries(PF_LABEL_TO_FIELD)) {
-    if (message.indexOf(label) >= 0) {
-      const el = document.getElementById(fid);
-      el.classList.add('invalid');
-      el.focus();
-      setTimeout(() => el.classList.remove('invalid'), 3000);
-    }
-  }
-}
-// 浠绘剰杈撳叆娓呮帀鑷韩绾㈡锛堥伩鍏?绾㈢潃杈撳叆"璇锛?['pf-name','pf-display','pf-template','pf-write','pf-rules','pf-code','pf-design']
-  .forEach(id => document.getElementById(id).addEventListener('input', (e) => e.target.classList.remove('invalid')));
-
-function renderDrawerList() {
-  let html = '<div class="drawer-item di-create' + (drawerSelected === null ? ' active' : '') + '" data-name="">'
-    + '<span class="di-new">锛?/span><span class="di-name">鏂板缓椤圭洰</span></div>';
-  for (const p of projects) {
-    html += '<div class="drawer-item' + (p.name === drawerSelected ? ' active' : '') + '" data-name="' + esc(p.name) + '">'
-      + '<span class="di-name">' + esc(p.display_name || p.name) + '</span></div>';
-  }
-  const box = document.getElementById('drawer-list');
-  box.innerHTML = html;
-  box.querySelectorAll('.drawer-item').forEach(it => {
-    it.onclick = () => {
-      if (!guardDrawerDirty()) return;
-      const n = it.dataset.name === '' ? null : it.dataset.name;
-      loadDrawerForm(n);
-    };
-  });
-}
-
-async function saveDrawerProject() {
-  clearPfInvalid();
-  const body = {
-    name: document.getElementById('pf-name').value.trim(),
-    display_name: document.getElementById('pf-display').value.trim(),
-    template: document.getElementById('pf-template').value.trim(),
-    write_instruction: document.getElementById('pf-write').value.trim(),
-    rules: document.getElementById('pf-rules').value.split(',').map(s => s.trim()).filter(Boolean),
-    existing_system_code_dir: document.getElementById('pf-code').value.trim(),
-    design_docs_dir: document.getElementById('pf-design').value.trim(),
-  };
-  if (!body.name) {
-    flagPfInvalidByMessage('椤圭洰鍚?);
-    addMsg('error', '椤圭洰鍚嶄笉鑳戒负绌?);
-    return;
-  }
-  try {
-    const cfg = await api('POST', '/api/projects', body);
-    draftProject = cfg.name;
-    drawerSelected = cfg.name;
-    await loadProjects();
-    addMsg('assistant', '椤圭洰銆? + esc(cfg.display_name || cfg.name) + '銆嶅凡淇濆瓨銆?);
-    closeProjectDrawer();
-  } catch (e) {
-    // 400 / PROJECT_CONFIG_INVALID锛氬瓧娈电骇绾㈡瀹氫綅
-    flagPfInvalidByMessage(String(e));
-    addMsg('error', '淇濆瓨椤圭洰澶辫触锛? + esc(String(e)));
-  }
-}
-
-async function deleteDrawerProject() {
-  if (!drawerSelected) return;
-  if (!confirm('纭鍒犻櫎椤圭洰銆? + drawerSelected + '銆嶏紵姝ゆ搷浣滀笉鍙挙閿€銆?)) return;
-  const deleted = drawerSelected;
-  try {
-    await api('DELETE', '/api/projects/' + encodeURIComponent(deleted));
-  } catch (e) {
-    addMsg('error', '鍒犻櫎椤圭洰澶辫触锛? + esc(String(e)));
-    return;
-  }
-  addMsg('assistant', '椤圭洰銆? + esc(deleted) + '銆嶅凡鍒犻櫎銆?);
-  // P1鈥慒锛氬厛璁颁綇琚垹鐨勶紝鍐嶆竻 drawerSelected锛涢伩鍏?鍏?null 鍚庢瘮杈?鎭掑亣 bug
-  drawerSelected = null;
-  if (draftProject === deleted) {
-    // 褰撳墠閫夌殑灏辨槸琚垹鐨勯」鐩?鈫?娓呯┖鍋忓ソ锛坅utoBindProject 浼氫粠鍓╀綑椤圭洰閲嶉€夛級
-    draftProject = null;
-  }
-  await loadProjects();
-  loadDrawerForm(null);
-}
-
-// ---------- 渚ц竟鏍忔姌鍙?----------
-function toggleSidebar(force) {
-  const el = document.getElementById('sidebar');
-  const willCollapse = force === undefined ? !el.classList.contains('collapsed') : !!force;
-  el.classList.toggle('collapsed', willCollapse);
-  // 切换折叠/展开图标 + title + data-state
-  const btn = document.getElementById('sidebar-toggle');
-  if (btn) {
-    if (willCollapse) {
-      btn.textContent = '»';
-      btn.title = '展开侧边栏';
-      btn.dataset.state = 'collapsed';
-    } else {
-      btn.textContent = '«';
-      btn.title = '折叠侧边栏';
-      btn.dataset.state = 'expanded';
-    }
-  }
-  try { localStorage.setItem('genesis_sidebar_collapsed', willCollapse ? '1' : '0'); } catch (e) { /* localStorage 不可用时忽略 */ }
+// Genesis Chat UI 业务逻辑（v1 拆分自原 chat.html 内联 <script> 段，行 1-704）
+// 本次完整恢复，零行为变更
+
+let sid = null;
+let progressWs = null;
+let draftProject = null;     // 下一空白会话将绑定/已绑的项目（原 currentProject）
+let activeProject = null;    // 当前已落库会话绑定的项目（来自后端）
+let projects = [];
+let drawerOpen = false;
+let drawerSelected = null;   // 当前抽屉中编辑的项目名（null = 新建模式）
+let lastTriggerEl = null;    // 打开抽屉/下拉前的焦点元素（C1）
+let drawerDirty = false;     // 抽屉表单是否有未保存改动（B6）
+  let drawerSnapshot = null;   // loadDrawerForm 时的字段快照（B6）
+
+// 状态逻辑统一走 chat_state.js；若静态路由未就绪则回退内联实现，避免整页脚本崩溃
+const GenesisState = window.GenesisState || {
+  autoBindProject: (d, p) => (d === null && p.length ? p[0].name : (d && !p.find(x => x.name === d) ? (p.length ? p[0].name : null) : d)),
+  shouldHideUploadSelect: () => false,
+  resolveUploadType: (_a, _d, v) => v,
+  computeDrawerSnapshot: (f) => f.map(x => (x == null ? '' : String(x)).trim()).join(String.fromCharCode(1)),
+  isDrawerDirty: (n, s) => n !== s,
+  buildWelcome: (d) => d === null ? '请新建项目或者选择项目'
+    : '你好！我是 Genesis 概要设计书生成 Agent。请先上传要件定义 xlsx（模板/规则/代码库已由项目「' + d + '」提供）。',
+};
+
+const chatEl = document.getElementById('chat');
+const inputEl = document.getElementById('input');
+const sendBtn = document.getElementById('send');
+const badge = document.getElementById('sid-badge');
+const psMenu = document.getElementById('ps-menu');
+const psName = document.getElementById('ps-name');
+const drawer = document.getElementById('proj-drawer');
+
+function addMsg(role, html) {
+  const m = document.createElement('div');
+  m.className = 'msg ' + role;
+  m.innerHTML = '<div class="bubble">' + html + '</div>';
+  chatEl.appendChild(m);
+  chatEl.scrollTop = chatEl.scrollHeight;
+  return m;
 }
-
-// ---------- 涓婁紶鍖猴細濮嬬粓鏄剧ず瀹屾暣绫诲瀷涓嬫媺 ----------
-// P0鈥態锛氶€夐」鐩椂涔熷厑璁歌ˉ浼?template / write_instruction / rules / existing_system锛?// 涓嶅啀钘忚捣鍏ュ彛銆?椤圭洰宸查缃?template 鏃跺啀涓婁紶 template"鍦ㄤ笂浼犲鐢?confirm() 鏄惧紡纭銆?function updateUploadBar() {
-  const sel = document.getElementById('file-type');
-  const hint = document.getElementById('proj-hint');
-  if (sel) sel.style.display = '';
-  if (!hint) return;
-  // 榛樿 file_type 浠嶄负 requirements锛堟渶甯哥敤锛夛紝浣嗕笅鎷夊缁堝彲鏀广€?  if (sel && sel.value !== 'requirements') sel.value = 'requirements';
-  if (draftProject) {
-    hint.textContent = '榛樿涓婁紶瑕佷欢瀹氫箟 xlsx锛涘闇€琛ヤ紶妯℃澘/瑙勫垯/鏃㈡湁绯荤粺 zip锛岃鍦ㄤ笅鎷変腑閫夋嫨瀵瑰簲绫诲瀷銆?;
-  } else {
-    hint.textContent = '璇烽€夋嫨 file_type 鍚庝笂浼狅紙鏈€夐」鐩椂锛屾ā鏉?瑙勫垯浠嶅彲鎵嬪姩涓婁紶锛夈€?;
-  }
-}
-
-// ---------- 绌烘€?娆㈣繋娓叉煋 ----------
-function renderEmptyOrWelcome() {
-  chatEl.innerHTML = '';
-  // P1鈥慒锛氭杩庢枃鐢?GenesisState.buildWelcome 缁熶竴鏉ユ簮
-  addMsg('assistant', GenesisState.buildWelcome(draftProject));
-}
-
-// ---------- 浼氳瘽鍒涘缓/鍔犺浇 ----------
-async function newSession() {
-   if (progressWs) { try { progressWs.close(); } catch (e) {} } progressWs = null;
-  sid = null;
-  activeProject = null;
-  // 淇濈暀 draftProject锛堝綋鍓嶉《鏍忓凡閫夐」鐩級锛屼娇鏂颁細璇濈户鎵块」鐩粦瀹氾紙搂4.2锛?  try { localStorage.removeItem('genesis_session'); } catch (e) { /* 蹇界暐 */ }
-  chatEl.innerHTML = '';
-  badge.textContent = '鏈垱寤轰細璇?;
-  updateUploadBar();
-  await refreshRagStats();
-  await refreshSessions();
-  renderEmptyOrWelcome();
-}
-
-async function loadSession(id) {
-  try {
-    const rec = await api('GET', '/api/sessions/' + encodeURIComponent(id));
-    sid = id;
-    activeProject = rec.project || null;
-    // P1鈥慏锛氫笉鍐嶉殣寮忚鐩?draftProject銆備細璇濅簨瀹?activeProject)涓庣敤鎴峰亸濂?draftProject)
-    // 鍒嗗眰锛涜嫢涓嶄竴鑷达紝鐢辨彁绀烘潯璁╃敤鎴蜂富鍔ㄩ€夋嫨銆?    // draftProject = rec.project || null;   // 鍒犻櫎锛氬師琛屼负浼氭倓鎮勬敼鐢ㄦ埛鍋忓ソ
-    applyProjectContext();
-    badge.textContent = '浼氳瘽: ' + (rec.name || '鏂颁細璇?);
-    if (progressWs) { try { progressWs.close(); } catch (e) {} }
-    progressWs = GenesisWS.connectProgressWs(id, {
-      onProgress: (e) => GenesisWS.applyProgressEvent(e, (role, text) => addMsg(role, text)),
-      onClose: () => {},
-    });
-    const msgs = await api('GET', '/api/chat/' + encodeURIComponent(id) + '/messages');
-    chatEl.innerHTML = '';
-    for (const m of msgs) {
-      const roleMap = { user: 'user', progress: 'progress', error: 'error' };
-      const role = roleMap[m.role] || 'assistant';
-      addMsg(role, esc(m.content));
-    }
-    updateUploadBar();
-    await refreshRagStats();
-    await refreshSessions();
-    try { localStorage.setItem('genesis_session', sid); } catch (e) { /* 蹇界暐 */ }
-    renderProjectMismatchHint();
-  } catch (e) {
-    addMsg('error', '鍔犺浇浼氳瘽澶辫触锛? + esc(String(e)));
-  }
-}
-
-// P1鈥慏锛氶」鐩笉鍖归厤鎻愮ず鏉°€俛ctiveProject 涓?draftProject 涓嶄竴鑷存椂鏄剧ず锛?// "鍒囧埌璇ラ」鐩? 鈫?鍐?draftProject = activeProject锛屽埛鏂帮紱
-// "淇濈暀"      鈫?鍐欏叆 sessionStorage 鏍囪锛屽埛鏂帮紱鍚庣画 loadSession 涓嶅啀鎻愮ず銆?function renderProjectMismatchHint() {
-  const old = document.getElementById('proj-mismatch-hint');
-  if (old) old.remove();
-  if (!sid) return;
-  if (!activeProject) return;
-  if (activeProject === draftProject) return;
-  // 宸?淇濈暀"杩囨湰浼氳瘽鐨勪笉鍐嶆彁绀?  let skipped = {};
-  try { skipped = JSON.parse(sessionStorage.getItem('genesis_skipped_project_hint') || '{}'); } catch (e) { skipped = {}; }
-  if (skipped[sid] === activeProject) return;
-  const wrap = document.createElement('div');
-  wrap.id = 'proj-mismatch-hint';
-  wrap.className = 'msg assistant';
-  wrap.innerHTML =
-    '<div class="bubble">' +
-    '璇ヤ細璇濆睘浜庨」鐩?<strong>' + esc(activeProject) + '</strong>锛? +
-    '褰撳墠椤舵爮椤圭洰涓?<strong>' + esc(draftProject || '锛堟湭閫夋嫨锛?) + '</strong>銆? +
-    '<div class="actions">' +
-    '<a href="#" data-act="switch">鍒囧埌璇ラ」鐩?/a>' +
-    '<a href="#" data-act="keep">淇濈暀褰撳墠椤圭洰</a>' +
-    '</div></div>';
-  chatEl.prepend(wrap);
-  wrap.querySelector('[data-act="switch"]').onclick = (e) => {
-    e.preventDefault();
-    draftProject = activeProject;
-    applyProjectContext();
-    renderProjectSwitcher();
-    updateUploadBar();
-    refreshSessions();
-    wrap.remove();
-  };
-  wrap.querySelector('[data-act="keep"]').onclick = (e) => {
-    e.preventDefault();
-    try {
-      skipped[sid] = activeProject;
-      sessionStorage.setItem('genesis_skipped_project_hint', JSON.stringify(skipped));
-    } catch (er) { /* 蹇界暐 */ }
-    wrap.remove();
-  };
-}
-
-// P2鈥慔锛歴end() in-flight 閿侊紝闃叉蹇€熷弻鍑讳骇鐢熼噸澶嶈姹?let sendInFlight = false;
-async function send() {
-  if (sendInFlight) return;   // in-flight 鏈熼棿鍐嶆杩涘叆鐩存帴蹇界暐
-  const text = inputEl.value.trim();
-  if (!text) return;
-  sendInFlight = true;
-  if (!sid) {
-    // 棣栨潯娑堟伅锛氬厛钀藉簱浼氳瘽锛圖-v4锛?    try {
-      const d = await api('POST', '/api/sessions', { user_id: 'default', project: draftProject || null });
-      sid = d.session_id;
-      activeProject = draftProject || null;
-      badge.textContent = '浼氳瘽: ' + (d.name || '鏂颁細璇?);
-      try { localStorage.setItem('genesis_session', sid); } catch (e) { /* 蹇界暐 */ }
-      await refreshSessions();
-    } catch (e) {
-      addMsg('error', '鍒涘缓浼氳瘽澶辫触锛? + esc(String(e)));
-      return;
-    }
-  }
-  if (progressWs) { try { progressWs.close(); } catch (e) {} }
-  progressWs = GenesisWS.connectProgressWs(sid, {
-    onProgress: (e) => GenesisWS.applyProgressEvent(e, (role, text) => addMsg(role, text)),
-    onClose: () => {},
-  });
-  inputEl.value = '';
-  addMsg('user', esc(text));
-  const typing = showTyping();
-  sendBtn.disabled = true;
-  try {
-    const res = await api('POST', '/api/chat/' + encodeURIComponent(sid) + '/messages', { content: text });
-    typing.remove();
-    if (res.progress && res.progress.length) {
-      const items = res.progress.map(p => '<span class="progress-item ' + (p.status || 'ok') + '">' + esc(p.step) + ': ' + esc(p.detail || '') + '</span>').join('');
-      addMsg('progress', items);
-    }
-    let replyHtml = esc(res.reply || '');
-    const s = res.status;
-    if (s === 'done' || s === 'writing') {
-      replyHtml += '<div class="actions">'
-        + '<a href="/api/sessions/' + sid + '/result/download">涓嬭浇 docx</a>'
-        + '<a href="/api/sessions/' + sid + '/result/preview">棰勮</a>'
-        + '<a href="/api/sessions/' + sid + '/result/impact-report">褰卞搷璋冩煡涔?/a>'
-        + '<a href="/api/sessions/' + sid + '/result/qa-report">QA 鎶ュ憡</a></div>';
-    }
-    addMsg('assistant', replyHtml);
-  } catch (e) {
-    typing.remove();
-    addMsg('error', '璇锋眰澶辫触锛? + esc(String(e)));
-  } finally {
-    sendInFlight = false;
-    sendBtn.disabled = false;
-    inputEl.focus();
-  }
-}
-
-document.getElementById('send').addEventListener('click', send);
-inputEl.addEventListener('keydown', e => { if (e.key === 'Enter') send(); });
-document.getElementById('new-chat').addEventListener('click', () => newSession().catch(e => addMsg('error', esc(String(e)))));
-document.getElementById('sidebar-toggle').addEventListener('click', () => toggleSidebar());
-document.getElementById('ps-current').addEventListener('click', (e) => { e.stopPropagation(); lastTriggerEl = e.currentTarget; toggleProjectSwitcher(); });
-document.getElementById('drawer-close').addEventListener('click', closeProjectDrawer);
-document.getElementById('pf-save').addEventListener('click', saveDrawerProject);
-document.getElementById('pf-delete').addEventListener('click', deleteDrawerProject);
-
-// ---------- P0鈥慉锛歊AG 寮€鍏?+ 鐘舵€佸窘鏍?+ 寮€濮嬪奖鍝嶈皟鏌?----------
-const ragEnabledEl = document.getElementById('rag-enabled');
-const ragStatsEl   = document.getElementById('rag-stats');
-const ragBarEl     = document.getElementById('rag-bar');
-const impactBtnEl  = document.getElementById('impact-btn');
-
-const RAG_LS_KEY = 'genesis_rag_enabled';
-function readRagFlag() {
-  try { return localStorage.getItem(RAG_LS_KEY) === '1'; } catch (e) { return false; }
-}
-function writeRagFlag(v) {
-  try { localStorage.setItem(RAG_LS_KEY, v ? '1' : '0'); } catch (e) { /* 蹇界暐 */ }
-}
-ragEnabledEl.addEventListener('change', () => { writeRagFlag(ragEnabledEl.checked); updateImpactButton(); });
-
-async function refreshRagStats() {
-  // 鏃?sid 鈫?闅愯棌 RAG 鏉?  if (!sid) {
-    ragBarEl.hidden = true;
-    return;
-  }
-  ragBarEl.hidden = false;
-  let stats = { chunks: 0, rag_enabled: false };
-  try {
-    stats = await api('GET', '/api/sessions/' + encodeURIComponent(sid) + '/rag-stats');
-  } catch (e) {
-    stats = { chunks: 0, rag_enabled: false };
-  }
-  const n = Number(stats.chunks) || 0;
-  ragStatsEl.textContent = n > 0
-    ? 'RAG 宸茬储寮?' + n + ' 鐗囨'
-    : 'RAG 0 鐗囨锛堣涓婁紶鏃㈡湁绯荤粺 zip锛?;
-  ragStatsEl.classList.toggle('ready', n > 0);
-  ragStatsEl.classList.toggle('zero', n === 0);
-  // 寮€鍏冲彲鐢ㄦ€э細蹇呴』鍏堟湁 RAG 绱㈠紩鎵嶈兘鐢?  ragEnabledEl.disabled = n === 0;
-  if (n === 0) {
-    ragEnabledEl.checked = false;
-    writeRagFlag(false);
-    ragEnabledEl.parentElement.title = '璇峰厛鍦ㄤ笂浼犲尯閫夋嫨"鏃㈡湁绯荤粺 zip"骞朵笂浼?;
-  } else {
-    ragEnabledEl.checked = readRagFlag();
-    ragEnabledEl.parentElement.title = ragEnabledEl.checked
-      ? 'RAG 妫€绱㈢粨鏋滀細娉ㄥ叆鍒?LLM prompt'
-      : '鍕鹃€夊悗鍚敤 RAG 妫€绱?;
-  }
-  updateImpactButton();
-}
-
-function updateImpactButton() {
-  // 宸叉湁 RAG 绱㈠紩锛坮ag-stats 鍐冲畾锛?涓旀湁 sid 鎵嶈兘褰卞搷
-  if (!sid) { impactBtnEl.disabled = true; return; }
-  const hasRag = (Number(ragStatsEl.dataset.chunks || 0) > 0) || !ragEnabledEl.disabled;
-  impactBtnEl.disabled = !hasRag;
-  impactBtnEl.textContent = ragEnabledEl.checked
-    ? '寮€濮嬪奖鍝嶈皟鏌ワ紙鍚敤 RAG锛?
-    : '寮€濮嬪奖鍝嶈皟鏌?;
-}
-
-impactBtnEl.addEventListener('click', async () => {
-  if (!sid) { addMsg('error', '璇峰厛鍙戦€佷竴鏉℃秷鎭互鍒涘缓浼氳瘽'); inputEl.focus(); return; }
-  const useRag = !!ragEnabledEl.checked;
-  impactBtnEl.disabled = true;
-  const typing = showTyping();
-  try {
-    const url = '/api/sessions/' + encodeURIComponent(sid) + '/start-impact?use_rag=' + (useRag ? 'true' : 'false');
-    const r = await fetch(url, { method: 'POST' });
-    const d = await r.json();
-    if (!r.ok) throw new Error(d.detail?.message || r.status);
-    typing.remove();
-    addMsg('progress', '<span class="progress-item ok">褰卞搷璋冩煡宸叉彁浜わ紙use_rag=' + (useRag ? 'true' : 'false') + '锛?/span>');
-    // 璁?WebSocket 鎶婂悗缁繘搴︽帹涓婃潵锛涚◢鍚庣敤鎴峰彲鏌?impact-result
-    addMsg('assistant', '褰卞搷璋冩煡宸插惎鍔ㄣ€傚畬鎴愬悗鍙湪姝や細璇濈偣鍑?棰勮"鎴栬闂?/result/impact-report 涓嬭浇鎶ュ憡銆?);
-  } catch (e) {
-    typing.remove();
-    addMsg('error', '褰卞搷璋冩煡澶辫触锛? + esc(String(e)));
-  } finally {
-    updateImpactButton();
-  }
-});
-document.addEventListener('click', (e) => {
-  // 鐐瑰嚮鍒囨崲鍣ㄥ閮ㄥ叧闂笅鎷?  if (!document.getElementById('proj-switcher').contains(e.target)) toggleProjectSwitcher(false);
-});
-document.addEventListener('keydown', (e) => {
-  if (e.key === 'Escape') {
-    if (psMenu.classList.contains('open')) toggleProjectSwitcher(false);
-    else if (drawerOpen) closeProjectDrawer();
-    if (lastTriggerEl) { lastTriggerEl.focus(); lastTriggerEl = null; }
-  }
-});
-
-// 瀹㈡埛绔被鍨?鈫?鎵╁睍鍚嶇櫧鍚嶅崟鏍￠獙锛圥0鈥態 / P1鈥慐锛夈€?const UPLOAD_EXT_RULES = {
-  existing_system: ['.zip'],
-  requirements: ['.xlsx'],
-  template: ['.docx'],
-  write_instruction: ['.docx'],
-  rules: ['.docx', '.xlsx'],
-};
-function pickExt(name) {
-  const i = String(name).lastIndexOf('.');
-  return i >= 0 ? String(name).slice(i).toLowerCase() : '';
-}
-// 椤圭洰绾ч缃?鈫?鎻愰啋锛氬啀娆′笂浼犲皢瑕嗙洊璇ヤ細璇濈殑璇ョ被鍨嬫枃浠躲€?// 杩欓噷鐢?activeProject/draftProject 瀵瑰簲鐨勯」鐩?config锛坧rojects[]锛夊垽瀹氭槸鍚﹂缃€?function projectHasPrefixedType(ft) {
-  const name = activeProject || draftProject;
-  if (!name) return false;
-  const p = (projects || []).find(x => x.name === name);
-  if (!p) return false;
-  if (ft === 'template') return !!(p.template && p.template.trim());
-  if (ft === 'write_instruction') return !!(p.write_instruction && p.write_instruction.trim());
-  if (ft === 'existing_system') return !!(p.existing_system_code_dir && p.existing_system_code_dir.trim());
-  if (ft === 'rules') return Array.isArray(p.rules) && p.rules.length > 0;
-  return false;
-}
-
-document.getElementById('upload-btn').addEventListener('click', async () => {
-  if (!sid) { addMsg('error', '璇峰厛鍙戦€佷竴鏉℃秷鎭互鍒涘缓浼氳瘽'); inputEl.focus(); return; }
-  const sel = document.getElementById('file-type');
-  const ft = GenesisState.resolveUploadType(activeProject, draftProject, sel.value);
-  const file = document.getElementById('file-input').files[0];
-  if (!file) { addMsg('error', '璇烽€夋嫨鏂囦欢'); return; }
-  // P0鈥態 / P1鈥慐锛氬鎴风绫诲瀷涓庢墿灞曞悕鏍￠獙
-  const allowed = UPLOAD_EXT_RULES[ft];
-  if (allowed) {
-    const ext = pickExt(file.name);
-    if (!ext || !allowed.includes(ext)) {
-      addMsg('error', '绫诲瀷涓嶅尮閰嶏細' + esc(ft) + ' 搴斾负 ' + allowed.join('/') + ' 鏂囦欢锛堝綋鍓嶏細' + esc(file.name) + '锛?);
-      return;
-    }
-  }
-  // P0鈥態锛氶」鐩凡棰勭疆鍚岀被鍨嬫椂鏄惧紡纭瑕嗙洊锛堜笉鍐嶄互"钘忚捣鍏ュ彛"鍋氶殣寮忕害鏉燂級
-  if (projectHasPrefixedType(ft)) {
-    const ok = confirm('椤圭洰宸查缃?' + ft + '銆傜户缁笂浼犲皢瑕嗙洊璇ヤ細璇濅腑鐨勬绫诲瀷鏂囦欢锛屾槸鍚︾户缁紵');
-    if (!ok) return;
-  }
-  const fd = new FormData();
-  fd.append('file_type', ft);
-  fd.append('file', file);
-  const statusEl = document.getElementById('upload-status');
-  statusEl.textContent = '涓婁紶涓€?;
-  try {
-    const r = await fetch('/api/sessions/' + encodeURIComponent(sid) + '/files', { method: 'POST', body: fd });
-    const d = await r.json();
-    if (!r.ok) throw new Error(d.detail?.message || r.status);
-    statusEl.textContent = '';
-    // B5 / P1鈥慒锛氫笂浼犳垚鍔熷悗鍚屾 activeProject銆佸埛鏂颁笂浼犳潯涓庝晶杈规爮鐘舵€?    const rec = await api('GET', '/api/sessions/' + encodeURIComponent(sid));
-    activeProject = rec.project || null;
-    badge.textContent = '浼氳瘽: ' + (rec.name || '鏂颁細璇?);
-    await refreshSessions();
-    updateUploadBar();   // P1鈥慒锛氫笂浼犳垚鍔熷悗鍚屾涓婁紶鏉★紙闃茬姸鎬佹粸鍚庯級
-    await refreshRagStats();   // P0鈥慉锛氫笂浼?existing_system 鍚?RAG 绱㈠紩宸插缓
-    document.getElementById('file-input').value = '';   // 浠呮垚鍔熸椂娓呯┖
-    addMsg('user', '[涓婁紶] ' + ft + '锛? + d.file_name);
-    addMsg('progress', '<span class="progress-item ok">涓婁紶瀹屾垚锛? + esc(d.file_name) + '锛? + d.size + 'B锛?/span>');
-  } catch (e) {
-    statusEl.textContent = '';
-    // F1锛氬け璐ヤ繚鐣?file-input 鍊硷紝灞曠ず鍚庣鏄庣粏
-    addMsg('error', '涓婁紶澶辫触锛? + esc(String(e)));
-  }
-});
-
-// ---------- 鍚姩锛氭仮澶嶄晶杈规爮鎶樺彔鎬併€佷笂娆′細璇?----------
-(async () => {
-  try {
-    const collapsed = localStorage.getItem('genesis_sidebar_collapsed') === '1';
-    if (collapsed) document.getElementById('sidebar').classList.add('collapsed');
-  } catch (e) { /* 蹇界暐 */ }
-  await loadProjects();
-  const saved = (() => { try { return localStorage.getItem('genesis_session'); } catch (e) { return null; } })();
-  if (saved) {
-    // P2鈥慔锛氬惎鍔ㄦ仮澶嶅墠鏄剧ず loading 鍗犱綅锛岄伩鍏嶇┖ chat 涓€闂?    addMsg('assistant', '姝ｅ湪鎭㈠涓婃浼氳瘽鈥?);
-    try {
-      await loadSession(saved);
-      // P2鈥?锛氭仮澶嶅悗鑻ヤ細璇濈殑椤圭洰宸茶鍒狅紝娓呮帀 localStorage 浠ュ厤涓嬫鍐嶈瘯
-      const rec = await api('GET', '/api/sessions/' + encodeURIComponent(saved));
-      const recProj = rec && rec.project;
-      if (recProj && !projects.find(p => p.name === recProj)) {
-        try { localStorage.removeItem('genesis_session'); } catch (e) { /* 蹇界暐 */ }
-        // 椤舵爮鑻ユ樉绀虹殑鏄凡鍒犻」鐩紝鍒锋柊鍥為€€
-        if (draftProject === recProj) {
-          draftProject = (projects.length > 0) ? projects[0].name : null;
-          applyProjectContext();
-        }
-      }
-      return;
-    } catch (e) { /* 蹇界暐锛屾柊寤?*/ }
-  }
-  newSession().catch(e => addMsg('error', esc(String(e))));
-})();
\ No newline at end of file
+function esc(s) { return String(s).replace(/[&<>"']/g, c => ({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[c])); }
+function showTyping() { return addMsg('assistant', '<span class="typing">思考中…</span>'); }
+
+async function api(method, url, body) {
+  const opt = { method, headers: {} };
+  if (body !== undefined) { opt.headers['Content-Type'] = 'application/json'; opt.body = JSON.stringify(body); }
+  const r = await fetch(url, opt);
+  const data = await r.json().catch(() => ({}));
+  if (!r.ok) throw new Error(data.detail?.message || r.status);
+  return data;
+}
+
+// ---------- 会话列表 ----------
+async function refreshSessions() {
+  const box = document.getElementById('session-list');
+  if (draftProject === null) { box.innerHTML = ''; return; }  // 未选项目 → 无历史
+  const list = await api('GET', '/api/sessions?user_id=default&project=' + encodeURIComponent(draftProject));
+  box.innerHTML = '';
+  list.sort((a, b) => (b.updated_at || '').localeCompare(a.updated_at || ''));
+  for (const s of list) {
+    const el = document.createElement('div');
+    el.className = 'sess' + (s.session_id === sid ? ' active' : '');
+    const proj = s.project ? ' · ' + esc(s.project) : '';
+    // P3‑1：取首字符（含中文/日文/英文）作 avatar，并用名字 hash 选色，避免重名混淆
+    const rawName = (s.name || '新').trim();
+    const avatar = rawName ? Array.from(rawName)[0] : '新';
+    const palette = ['#1a73e8', '#34a853', '#fbbc05', '#ea4335', '#8e24aa', '#0097a7', '#5f6368'];
+    let h = 0;
+    for (let i = 0; i < rawName.length; i++) h = (h * 31 + rawName.charCodeAt(i)) | 0;
+    const color = palette[Math.abs(h) % palette.length];
+    el.innerHTML =
+      '<div class="avatar" style="background:' + color + ';">' + esc(avatar) + '</div>' +
+      '<div class="info">' +
+        '<div class="name">' + esc(s.name || '新会话') + '</div>' +
+        '<div class="meta">' + esc(s.status) + proj + '</div>' +
+      '</div>' +
+      '<button class="del" title="删除会话" aria-label="删除会话 ' + esc(rawName) + '">×</button>';
+    el.querySelector('.info').onclick = () => loadSession(s.session_id);
+    const delBtn = el.querySelector('.del');
+    delBtn.onclick = (ev) => { ev.stopPropagation(); deleteSession(s.session_id); };
+    box.appendChild(el);
+  }
+}
+
+async function deleteSession(targetSid) {
+  if (!confirm('确认删除该会话？此操作不可撤销。')) return;
+  try {
+    await api('DELETE', '/api/sessions/' + encodeURIComponent(targetSid));
+  } catch (e) {
+    addMsg('error', '删除失败：' + esc(String(e)));
+    return;
+  }
+  if (targetSid === sid) {
+    // 删除的是当前会话 → 自动新建并清空
+    await newSession();
+  } else {
+    await refreshSessions();
+  }
+}
+
+// ---------- 项目配置 ----------
+async function loadProjects() {
+  try {
+    projects = await api('GET', '/api/projects');
+  } catch (e) {
+    projects = [];
+  }
+  // 启动自动绑首项 / 已删项目回退首项（统一由 GenesisState.autoBindProject 处理）
+  draftProject = GenesisState.autoBindProject(draftProject, projects);
+  applyProjectContext();
+  renderProjectSwitcher();
+  renderDrawerList();
+  if (drawerOpen) loadDrawerForm(drawerSelected);
+}
+
+function applyProjectContext() {
+  psName.textContent = draftProject || '未选择';
+}
+
+function renderProjectSwitcher() {
+  let html = '<div class="ps-item' + (draftProject === null ? ' active' : '') + '" data-name="">'
+    + '<span>不选择项目</span><span class="ps-check">✓</span></div>';
+  for (const p of projects) {
+    html += '<div class="ps-item' + (p.name === draftProject ? ' active' : '') + '" data-name="' + esc(p.name) + '">'
+      + '<span>' + esc(p.display_name || p.name) + '</span><span class="ps-check">✓</span></div>';
+  }
+  html += '<div class="ps-sep"></div>'
+    + '<div class="ps-item ps-manage" data-manage="1">+ 项目管理（打开抽屉）</div>';
+  psMenu.innerHTML = html;
+  psMenu.querySelectorAll('.ps-item[data-name]').forEach(it => {
+    it.onclick = () => {
+      if (!guardDrawerDirty()) return;
+      draftProject = it.dataset.name === '' ? null : it.dataset.name;
+      applyProjectContext();
+      renderProjectSwitcher();
+      updateUploadBar();
+      toggleProjectSwitcher(false);
+    };
+  });
+  psMenu.querySelectorAll('.ps-item[data-manage]').forEach(it => {
+    it.onclick = () => {
+      if (!guardDrawerDirty()) return;
+      lastTriggerEl = it;
+      toggleProjectSwitcher(false);
+      openProjectDrawer(drawerSelected);
+    };
+  });
+}
+
+function toggleProjectSwitcher(force) {
+  const willOpen = force === undefined ? !psMenu.classList.contains('open') : !!force;
+  psMenu.classList.toggle('open', willOpen);
+}
+
+// ---------- 抽屉 ----------
+function openProjectDrawer(projectName) {
+  drawerOpen = true;
+  toggleProjectSwitcher(false);
+  drawer.classList.add('open');
+  const sel = (projectName === undefined || projectName === null) ? drawerSelected : projectName;
+  try { loadDrawerForm(sel); } catch (e) { console.error(e); }
+  renderDrawerList();   // 始终渲染左侧列表（含 +新建项目）
+}
+
+function closeProjectDrawer() {
+  if (!guardDrawerDirty()) return;
+  drawerOpen = false;
+  drawer.classList.remove('open');
+}
+
+function loadDrawerForm(projectName) {
+  drawerSelected = (projectName === undefined) ? drawerSelected : projectName;
+  const nameEl = document.getElementById('pf-name');
+  const dispEl = document.getElementById('pf-display');
+  const tplEl = document.getElementById('pf-template');
+  const wrEl = document.getElementById('pf-write');
+  const rulesEl = document.getElementById('pf-rules');
+  const codeEl = document.getElementById('pf-code');
+  const designEl = document.getElementById('pf-design');
+  const delBtn = document.getElementById('pf-delete');
+  if (drawerSelected) {
+    const p = projects.find(x => x.name === drawerSelected);
+    if (p) {
+      nameEl.value = p.name; nameEl.readOnly = true;
+      dispEl.value = p.display_name || '';
+      tplEl.value = p.template || '';
+      wrEl.value = p.write_instruction || '';
+      rulesEl.value = (p.rules || []).join(', ');
+      codeEl.value = p.existing_system_code_dir || '';
+      designEl.value = p.design_docs_dir || '';
+      delBtn.hidden = false;
+    }
+  } else {
+    nameEl.value = ''; nameEl.readOnly = false;
+    dispEl.value = '';
+    tplEl.value = ''; wrEl.value = ''; rulesEl.value = ''; codeEl.value = ''; designEl.value = '';
+    delBtn.hidden = true;
+  }
+  // B6：记录字段快照用于脏检测
+  drawerSnapshot = drawerSnapshotNow();
+  renderDrawerList();
+}
+
+// B6：抽屉未保存变更守卫
+function drawerSnapshotNow() {
+  return GenesisState.computeDrawerSnapshot([
+    document.getElementById('pf-name').value,
+    document.getElementById('pf-display').value,
+    document.getElementById('pf-template').value,
+    document.getElementById('pf-write').value,
+    document.getElementById('pf-rules').value,
+    document.getElementById('pf-code').value,
+    document.getElementById('pf-design').value,
+  ]);
+}
+function isDrawerDirty() {
+  if (!drawerOpen || drawerSnapshot === null) return false;
+  return GenesisState.isDrawerDirty(drawerSnapshotNow(), drawerSnapshot);
+}
+function guardDrawerDirty() {
+  if (isDrawerDirty()) return confirm('有未保存的修改，确定放弃？');
+  return true;
+}
+
+// P0‑C：抽屉字段级红框。命中关键字 → 给对应输入加 .invalid 3 秒后清除。
+// 关键字与 store.py 的 ProjectConfigError 中文 label 对齐。
+const PF_LABEL_TO_FIELD = {
+  '项目名': 'pf-name',
+  '模板': 'pf-template',
+  '做成说明书': 'pf-write',
+  '规则': 'pf-rules',
+  '既有系统代码库': 'pf-code',
+  '既有设计文档目录': 'pf-design',
+};
+function clearPfInvalid() {
+  ['pf-name','pf-display','pf-template','pf-write','pf-rules','pf-code','pf-design']
+    .forEach(id => document.getElementById(id).classList.remove('invalid'));
+}
+function flagPfInvalidByMessage(message) {
+  if (!message) return;
+  for (const [label, fid] of Object.entries(PF_LABEL_TO_FIELD)) {
+    if (message.indexOf(label) >= 0) {
+      const el = document.getElementById(fid);
+      el.classList.add('invalid');
+      el.focus();
+      setTimeout(() => el.classList.remove('invalid'), 3000);
+    }
+  }
+}
+// 任意输入清掉自身红框（避免"红着输入"误导）
+['pf-name','pf-display','pf-template','pf-write','pf-rules','pf-code','pf-design']
+  .forEach(id => document.getElementById(id).addEventListener('input', (e) => e.target.classList.remove('invalid')));
+
+function renderDrawerList() {
+  let html = '<div class="drawer-item di-create' + (drawerSelected === null ? ' active' : '') + '" data-name="">'
+    + '<span class="di-new">＋</span><span class="di-name">新建项目</span></div>';
+  for (const p of projects) {
+    html += '<div class="drawer-item' + (p.name === drawerSelected ? ' active' : '') + '" data-name="' + esc(p.name) + '">'
+      + '<span class="di-name">' + esc(p.display_name || p.name) + '</span></div>';
+  }
+  const box = document.getElementById('drawer-list');
+  box.innerHTML = html;
+  box.querySelectorAll('.drawer-item').forEach(it => {
+    it.onclick = () => {
+      if (!guardDrawerDirty()) return;
+      const n = it.dataset.name === '' ? null : it.dataset.name;
+      loadDrawerForm(n);
+    };
+  });
+}
+
+async function saveDrawerProject() {
+  clearPfInvalid();
+  const body = {
+    name: document.getElementById('pf-name').value.trim(),
+    display_name: document.getElementById('pf-display').value.trim(),
+    template: document.getElementById('pf-template').value.trim(),
+    write_instruction: document.getElementById('pf-write').value.trim(),
+    rules: document.getElementById('pf-rules').value.split(',').map(s => s.trim()).filter(Boolean),
+    existing_system_code_dir: document.getElementById('pf-code').value.trim(),
+    design_docs_dir: document.getElementById('pf-design').value.trim(),
+  };
+  if (!body.name) {
+    flagPfInvalidByMessage('项目名');
+    addMsg('error', '项目名不能为空');
+    return;
+  }
+  try {
+    const cfg = await api('POST', '/api/projects', body);
+    draftProject = cfg.name;
+    drawerSelected = cfg.name;
+    await loadProjects();
+    addMsg('assistant', '项目「' + esc(cfg.display_name || cfg.name) + '」已保存。');
+    closeProjectDrawer();
+  } catch (e) {
+    // 400 / PROJECT_CONFIG_INVALID：字段级红框定位
+    flagPfInvalidByMessage(String(e));
+    addMsg('error', '保存项目失败：' + esc(String(e)));
+  }
+}
+
+async function deleteDrawerProject() {
+  if (!drawerSelected) return;
+  if (!confirm('确认删除项目「' + drawerSelected + '」？此操作不可撤销。')) return;
+  const deleted = drawerSelected;
+  try {
+    await api('DELETE', '/api/projects/' + encodeURIComponent(deleted));
+  } catch (e) {
+    addMsg('error', '删除项目失败：' + esc(String(e)));
+    return;
+  }
+  addMsg('assistant', '项目「' + esc(deleted) + '」已删除。');
+  // P1‑F：先记住被删的，再清 drawerSelected；避免"先 null 后比较"恒假 bug
+  drawerSelected = null;
+  if (draftProject === deleted) {
+    // 当前选的就是被删的项目 → 清空偏好（autoBindProject 会从剩余项目重选）
+    draftProject = null;
+  }
+  await loadProjects();
+  loadDrawerForm(null);
+}
+
+// ---------- 侧边栏折叠 ----------
+function toggleSidebar(force) {
+  const el = document.getElementById('sidebar');
+  const willCollapse = force === undefined ? !el.classList.contains('collapsed') : !!force;
+  el.classList.toggle('collapsed', willCollapse);
+  // 切换折叠/展开图标 + title + data-state
+  const btn = document.getElementById('sidebar-toggle');
+  if (btn) {
+    if (willCollapse) {
+      btn.textContent = '»';
+      btn.title = '展开侧边栏';
+      btn.dataset.state = 'collapsed';
+    } else {
+      btn.textContent = '«';
+      btn.title = '折叠侧边栏';
+      btn.dataset.state = 'expanded';
+    }
+  }
+  try { localStorage.setItem('genesis_sidebar_collapsed', willCollapse ? '1' : '0'); } catch (e) { /* localStorage 不可用时忽略 */ }
+}
+
+// ---------- 上传区：始终显示完整类型下拉 ----------
+// P0‑B：选项目时也允许补传 template / write_instruction / rules / existing_system，
+// 不再藏起入口。"项目已预置 template 时再上传 template"在上传处用 confirm() 显式确认。
+function updateUploadBar() {
+  const sel = document.getElementById('file-type');
+  const hint = document.getElementById('proj-hint');
+  if (sel) sel.style.display = '';
+  if (!hint) return;
+  // 默认 file_type 仍为 requirements（最常用），但下拉始终可改。
+  if (sel && sel.value !== 'requirements') sel.value = 'requirements';
+  if (draftProject) {
+    hint.textContent = '默认上传要件定义 xlsx；如需补传模板/规则/既有系统 zip，请在下拉中选择对应类型。';
+  } else {
+    hint.textContent = '请选择 file_type 后上传（未选项目时，模板/规则仍可手动上传）。';
+  }
+}
+
+// ---------- 空态/欢迎渲染 ----------
+function renderEmptyOrWelcome() {
+  chatEl.innerHTML = '';
+  // P1‑F：欢迎文由 GenesisState.buildWelcome 统一来源
+  addMsg('assistant', GenesisState.buildWelcome(draftProject));
+}
+
+// ---------- 会话创建/加载 ----------
+async function newSession() {
+   if (progressWs) { try { progressWs.close(); } catch (e) {} } progressWs = null;
+  sid = null;
+  activeProject = null;
+  // 保留 draftProject（当前顶栏已选项目），使新会话继承项目绑定（§4.2）
+  try { localStorage.removeItem('genesis_session'); } catch (e) { /* 忽略 */ }
+  chatEl.innerHTML = '';
+  badge.textContent = '未创建会话';
+  updateUploadBar();
+  await refreshRagStats();
+  await refreshSessions();
+  renderEmptyOrWelcome();
+}
+
+async function loadSession(id) {
+  try {
+    const rec = await api('GET', '/api/sessions/' + encodeURIComponent(id));
+    sid = id;
+    activeProject = rec.project || null;
+    // P1‑D：不再隐式覆盖 draftProject。会话事实(activeProject)与用户偏好(draftProject)
+    // 分层；若不一致，由提示条让用户主动选择。
+    // draftProject = rec.project || null;   // 删除：原行为会悄悄改用户偏好
+    applyProjectContext();
+    badge.textContent = '会话: ' + (rec.name || '新会话');
+    if (progressWs) { try { progressWs.close(); } catch (e) {} }
+    progressWs = GenesisWS.connectProgressWs(id, {
+      onProgress: (e) => GenesisWS.applyProgressEvent(e, (role, text) => addMsg(role, text)),
+      onClose: () => {},
+    });
+    const msgs = await api('GET', '/api/chat/' + encodeURIComponent(id) + '/messages');
+    chatEl.innerHTML = '';
+    for (const m of msgs) {
+      const roleMap = { user: 'user', progress: 'progress', error: 'error' };
+      const role = roleMap[m.role] || 'assistant';
+      addMsg(role, esc(m.content));
+    }
+    updateUploadBar();
+    await refreshRagStats();
+    await refreshSessions();
+    try { localStorage.setItem('genesis_session', sid); } catch (e) { /* 忽略 */ }
+    renderProjectMismatchHint();
+  } catch (e) {
+    addMsg('error', '加载会话失败：' + esc(String(e)));
+  }
+}
+
+// P1‑D：项目不匹配提示条。activeProject 与 draftProject 不一致时显示，
+// "切到该项目" → 写 draftProject = activeProject，刷新；
+// "保留"      → 写入 sessionStorage 标记，刷新；后续 loadSession 不再提示。
+function renderProjectMismatchHint() {
+  const old = document.getElementById('proj-mismatch-hint');
+  if (old) old.remove();
+  if (!sid) return;
+  if (!activeProject) return;
+  if (activeProject === draftProject) return;
+  // 已"保留"过本会话的不再提示
+  let skipped = {};
+  try { skipped = JSON.parse(sessionStorage.getItem('genesis_skipped_project_hint') || '{}'); } catch (e) { skipped = {}; }
+  if (skipped[sid] === activeProject) return;
+  const wrap = document.createElement('div');
+  wrap.id = 'proj-mismatch-hint';
+  wrap.className = 'msg assistant';
+  wrap.innerHTML =
+    '<div class="bubble">' +
+    '该会话属于项目 <strong>' + esc(activeProject) + '</strong>，' +
+    '当前顶栏项目为 <strong>' + esc(draftProject || '（未选择）') + '</strong>。' +
+    '<div class="actions">' +
+    '<a href="#" data-act="switch">切到该项目</a>' +
+    '<a href="#" data-act="keep">保留当前项目</a>' +
+    '</div></div>';
+  chatEl.prepend(wrap);
+  wrap.querySelector('[data-act="switch"]').onclick = (e) => {
+    e.preventDefault();
+    draftProject = activeProject;
+    applyProjectContext();
+    renderProjectSwitcher();
+    updateUploadBar();
+    refreshSessions();
+    wrap.remove();
+  };
+  wrap.querySelector('[data-act="keep"]').onclick = (e) => {
+    e.preventDefault();
+    try {
+      skipped[sid] = activeProject;
+      sessionStorage.setItem('genesis_skipped_project_hint', JSON.stringify(skipped));
+    } catch (er) { /* 忽略 */ }
+    wrap.remove();
+  };
+}
+
+// P2‑H：send() in-flight 锁，防止快速双击产生重复请求
+let sendInFlight = false;
+async function send() {
+  if (sendInFlight) return;   // in-flight 期间再次进入直接忽略
+  const text = inputEl.value.trim();
+  if (!text) return;
+  sendInFlight = true;
+  if (!sid) {
+    // 首条消息：先落库会话（D-v4）
+    try {
+      const d = await api('POST', '/api/sessions', { user_id: 'default', project: draftProject || null });
+      sid = d.session_id;
+      activeProject = draftProject || null;
+      badge.textContent = '会话: ' + (d.name || '新会话');
+      try { localStorage.setItem('genesis_session', sid); } catch (e) { /* 忽略 */ }
+      await refreshSessions();
+    } catch (e) {
+      addMsg('error', '创建会话失败：' + esc(String(e)));
+      return;
+    }
+  }
+  if (progressWs) { try { progressWs.close(); } catch (e) {} }
+  progressWs = GenesisWS.connectProgressWs(sid, {
+    onProgress: (e) => GenesisWS.applyProgressEvent(e, (role, text) => addMsg(role, text)),
+    onClose: () => {},
+  });
+  inputEl.value = '';
+  addMsg('user', esc(text));
+  const typing = showTyping();
+  sendBtn.disabled = true;
+  try {
+    const res = await api('POST', '/api/chat/' + encodeURIComponent(sid) + '/messages', { content: text });
+    typing.remove();
+    if (res.progress && res.progress.length) {
+      const items = res.progress.map(p => '<span class="progress-item ' + (p.status || 'ok') + '">' + esc(p.step) + ': ' + esc(p.detail || '') + '</span>').join('');
+      addMsg('progress', items);
+    }
+    let replyHtml = esc(res.reply || '');
+    const s = res.status;
+    if (s === 'done' || s === 'writing') {
+      replyHtml += '<div class="actions">'
+        + '<a href="/api/sessions/' + sid + '/result/download">下载 docx</a>'
+        + '<a href="/api/sessions/' + sid + '/result/preview">预览</a>'
+        + '<a href="/api/sessions/' + sid + '/result/impact-report">影响调查书</a>'
+        + '<a href="/api/sessions/' + sid + '/result/qa-report">QA 报告</a></div>';
+    }
+    addMsg('assistant', replyHtml);
+  } catch (e) {
+    typing.remove();
+    addMsg('error', '请求失败：' + esc(String(e)));
+  } finally {
+    sendInFlight = false;
+    sendBtn.disabled = false;
+    inputEl.focus();
+  }
+}
+
+document.getElementById('send').addEventListener('click', send);
+inputEl.addEventListener('keydown', e => { if (e.key === 'Enter') send(); });
+document.getElementById('new-chat').addEventListener('click', () => newSession().catch(e => addMsg('error', esc(String(e)))));
+document.getElementById('sidebar-toggle').addEventListener('click', () => toggleSidebar());
+document.getElementById('ps-current').addEventListener('click', (e) => { e.stopPropagation(); lastTriggerEl = e.currentTarget; toggleProjectSwitcher(); });
+document.getElementById('drawer-close').addEventListener('click', closeProjectDrawer);
+document.getElementById('pf-save').addEventListener('click', saveDrawerProject);
+document.getElementById('pf-delete').addEventListener('click', deleteDrawerProject);
+
+// ---------- P0‑A：RAG 开关 + 状态徽标 + 开始影响调查 ----------
+const ragEnabledEl = document.getElementById('rag-enabled');
+const ragStatsEl   = document.getElementById('rag-stats');
+const ragBarEl     = document.getElementById('rag-bar');
+const impactBtnEl  = document.getElementById('impact-btn');
+
+const RAG_LS_KEY = 'genesis_rag_enabled';
+function readRagFlag() {
+  try { return localStorage.getItem(RAG_LS_KEY) === '1'; } catch (e) { return false; }
+}
+function writeRagFlag(v) {
+  try { localStorage.setItem(RAG_LS_KEY, v ? '1' : '0'); } catch (e) { /* 忽略 */ }
+}
+ragEnabledEl.addEventListener('change', () => { writeRagFlag(ragEnabledEl.checked); updateImpactButton(); });
+
+async function refreshRagStats() {
+  // 无 sid → 隐藏 RAG 条
+  if (!sid) {
+    ragBarEl.hidden = true;
+    return;
+  }
+  ragBarEl.hidden = false;
+  let stats = { chunks: 0, rag_enabled: false };
+  try {
+    stats = await api('GET', '/api/sessions/' + encodeURIComponent(sid) + '/rag-stats');
+  } catch (e) {
+    stats = { chunks: 0, rag_enabled: false };
+  }
+  const n = Number(stats.chunks) || 0;
+  ragStatsEl.textContent = n > 0
+    ? 'RAG 已索引 ' + n + ' 片段'
+    : 'RAG 0 片段（请上传既有系统 zip）';
+  ragStatsEl.classList.toggle('ready', n > 0);
+  ragStatsEl.classList.toggle('zero', n === 0);
+  // 开关可用性：必须先有 RAG 索引才能用
+  ragEnabledEl.disabled = n === 0;
+  if (n === 0) {
+    ragEnabledEl.checked = false;
+    writeRagFlag(false);
+    ragEnabledEl.parentElement.title = '请先在上传区选择"既有系统 zip"并上传';
+  } else {
+    ragEnabledEl.checked = readRagFlag();
+    ragEnabledEl.parentElement.title = ragEnabledEl.checked
+      ? 'RAG 检索结果会注入到 LLM prompt'
+      : '勾选后启用 RAG 检索';
+  }
+  updateImpactButton();
+}
+
+function updateImpactButton() {
+  // 已有 RAG 索引（rag-stats 决定） 且有 sid 才能影响
+  if (!sid) { impactBtnEl.disabled = true; return; }
+  const hasRag = (Number(ragStatsEl.dataset.chunks || 0) > 0) || !ragEnabledEl.disabled;
+  impactBtnEl.disabled = !hasRag;
+  impactBtnEl.textContent = ragEnabledEl.checked
+    ? '开始影响调查（启用 RAG）'
+    : '开始影响调查';
+}
+
+impactBtnEl.addEventListener('click', async () => {
+  if (!sid) { addMsg('error', '请先发送一条消息以创建会话'); inputEl.focus(); return; }
+  const useRag = !!ragEnabledEl.checked;
+  impactBtnEl.disabled = true;
+  const typing = showTyping();
+  try {
+    const url = '/api/sessions/' + encodeURIComponent(sid) + '/start-impact?use_rag=' + (useRag ? 'true' : 'false');
+    const r = await fetch(url, { method: 'POST' });
+    const d = await r.json();
+    if (!r.ok) throw new Error(d.detail?.message || r.status);
+    typing.remove();
+    addMsg('progress', '<span class="progress-item ok">影响调查已提交（use_rag=' + (useRag ? 'true' : 'false') + '）</span>');
+    // 让 WebSocket 把后续进度推上来；稍后用户可查 impact-result
+    addMsg('assistant', '影响调查已启动。完成后可在此会话点击"预览"或访问 /result/impact-report 下载报告。');
+  } catch (e) {
+    typing.remove();
+    addMsg('error', '影响调查失败：' + esc(String(e)));
+  } finally {
+    updateImpactButton();
+  }
+});
+document.addEventListener('click', (e) => {
+  // 点击切换器外部关闭下拉
+  if (!document.getElementById('proj-switcher').contains(e.target)) toggleProjectSwitcher(false);
+});
+document.addEventListener('keydown', (e) => {
+  if (e.key === 'Escape') {
+    if (psMenu.classList.contains('open')) toggleProjectSwitcher(false);
+    else if (drawerOpen) closeProjectDrawer();
+    if (lastTriggerEl) { lastTriggerEl.focus(); lastTriggerEl = null; }
+  }
+});
+
+// 客户端类型 → 扩展名白名单校验（P0‑B / P1‑E）。
+const UPLOAD_EXT_RULES = {
+  existing_system: ['.zip'],
+  requirements: ['.xlsx'],
+  template: ['.docx'],
+  write_instruction: ['.docx'],
+  rules: ['.docx', '.xlsx'],
+};
+function pickExt(name) {
+  const i = String(name).lastIndexOf('.');
+  return i >= 0 ? String(name).slice(i).toLowerCase() : '';
+}
+// 项目级预置 → 提醒：再次上传将覆盖该会话的该类型文件。
+// 这里用 activeProject/draftProject 对应的项目 config（projects[]）判定是否预置。
+function projectHasPrefixedType(ft) {
+  const name = activeProject || draftProject;
+  if (!name) return false;
+  const p = (projects || []).find(x => x.name === name);
+  if (!p) return false;
+  if (ft === 'template') return !!(p.template && p.template.trim());
+  if (ft === 'write_instruction') return !!(p.write_instruction && p.write_instruction.trim());
+  if (ft === 'existing_system') return !!(p.existing_system_code_dir && p.existing_system_code_dir.trim());
+  if (ft === 'rules') return Array.isArray(p.rules) && p.rules.length > 0;
+  return false;
+}
+
+document.getElementById('upload-btn').addEventListener('click', async () => {
+  if (!sid) { addMsg('error', '请先发送一条消息以创建会话'); inputEl.focus(); return; }
+  const sel = document.getElementById('file-type');
+  const ft = GenesisState.resolveUploadType(activeProject, draftProject, sel.value);
+  const file = document.getElementById('file-input').files[0];
+  if (!file) { addMsg('error', '请选择文件'); return; }
+  // P0‑B / P1‑E：客户端类型与扩展名校验
+  const allowed = UPLOAD_EXT_RULES[ft];
+  if (allowed) {
+    const ext = pickExt(file.name);
+    if (!ext || !allowed.includes(ext)) {
+      addMsg('error', '类型不匹配：' + esc(ft) + ' 应为 ' + allowed.join('/') + ' 文件（当前：' + esc(file.name) + '）');
+      return;
+    }
+  }
+  // P0‑B：项目已预置同类型时显式确认覆盖（不再以"藏起入口"做隐式约束）
+  if (projectHasPrefixedType(ft)) {
+    const ok = confirm('项目已预置 ' + ft + '。继续上传将覆盖该会话中的此类型文件，是否继续？');
+    if (!ok) return;
+  }
+  const fd = new FormData();
+  fd.append('file_type', ft);
+  fd.append('file', file);
+  const statusEl = document.getElementById('upload-status');
+  statusEl.textContent = '上传中…';
+  try {
+    const r = await fetch('/api/sessions/' + encodeURIComponent(sid) + '/files', { method: 'POST', body: fd });
+    const d = await r.json();
+    if (!r.ok) throw new Error(d.detail?.message || r.status);
+    statusEl.textContent = '';
+    // B5 / P1‑F：上传成功后同步 activeProject、刷新上传条与侧边栏状态
+    const rec = await api('GET', '/api/sessions/' + encodeURIComponent(sid));
+    activeProject = rec.project || null;
+    badge.textContent = '会话: ' + (rec.name || '新会话');
+    await refreshSessions();
+    updateUploadBar();   // P1‑F：上传成功后同步上传条（防状态滞后）
+    await refreshRagStats();   // P0‑A：上传 existing_system 后 RAG 索引已建
+    document.getElementById('file-input').value = '';   // 仅成功时清空
+    addMsg('user', '[上传] ' + ft + '：' + d.file_name);
+    addMsg('progress', '<span class="progress-item ok">上传完成：' + esc(d.file_name) + '（' + d.size + 'B）</span>');
+  } catch (e) {
+    statusEl.textContent = '';
+    // F1：失败保留 file-input 值，展示后端明细
+    addMsg('error', '上传失败：' + esc(String(e)));
+  }
+});
+
+// ---------- 启动：恢复侧边栏折叠态、上次会话 ----------
+(async () => {
+  try {
+    const collapsed = localStorage.getItem('genesis_sidebar_collapsed') === '1';
+    if (collapsed) document.getElementById('sidebar').classList.add('collapsed');
+  } catch (e) { /* 忽略 */ }
+  await loadProjects();
+  const saved = (() => { try { return localStorage.getItem('genesis_session'); } catch (e) { return null; } })();
+  if (saved) {
+    // P2‑H：启动恢复前显示 loading 占位，避免空 chat 一闪
+    addMsg('assistant', '正在恢复上次会话…');
+    try {
+      await loadSession(saved);
+      // P2‑7：恢复后若会话的项目已被删，清掉 localStorage 以免下次再试
+      const rec = await api('GET', '/api/sessions/' + encodeURIComponent(saved));
+      const recProj = rec && rec.project;
+      if (recProj && !projects.find(p => p.name === recProj)) {
+        try { localStorage.removeItem('genesis_session'); } catch (e) { /* 忽略 */ }
+        // 顶栏若显示的是已删项目，刷新回退
+        if (draftProject === recProj) {
+          draftProject = (projects.length > 0) ? projects[0].name : null;
+          applyProjectContext();
+        }
+      }
+      return;
+    } catch (e) { /* 忽略，新建 */ }
+  }
+  newSession().catch(e => addMsg('error', esc(String(e))));
+})();