Refine codex app controls and message navigation

AGENTS.md

@@ -20,3 +20,69 @@ If you're using Codex, project-scoped helpers may also live in:
 Keep this managed block so 'trellis update' can refresh the instructions.
 
 <!-- TRELLIS:END -->
+
+## Codex App / hapi 对齐经验
+
+以下约定来自本项目对 `/home/hdzx/2026/hapi` 中 Codex app-server 接入方式的对比结果。后续如果继续维护 `codexapp`，默认按这些约定实现，避免再走偏到“看起来能跑、但拿不到原生协作能力”的分叉路径。
+
+### 1. 初始化链路优先对齐上游协议
+
+- `initialize` 成功后，先发送 `initialized` notification。
+- 然后再做 best-effort 的能力探测：
+  - `experimentalFeature/enablement/set`，当前至少尝试 `{ enablement: { goals: true } }`
+  - `collaborationMode/list`
+- 上述探测失败时：
+  - 只记录日志
+  - 不直接中断 `codexapp` 启动
+
+### 2. collaborationMode 的参数形状必须贴近 hapi
+
+- 一旦本轮使用 `collaborationMode`，`turn/start` 顶层参数应保持精简。
+- `model`、`reasoning_effort`、`developer_instructions` 应放入：
+  - `collaborationMode.settings.model`
+  - `collaborationMode.settings.reasoning_effort`
+  - `collaborationMode.settings.developer_instructions`
+- 使用 `collaborationMode` 时，不要再重复传顶层 `model` / `effort`，否则容易让 app-server 落到非原生协作路径。
+
+### 3. 自定义跨会话能力走 MCP，不优先走 dynamicTools
+
+- `ccweb_list_conversations`、`ccweb_send_message` 这类自定义能力，优先通过 `thread/start.config.mcp_servers.*` 挂载。
+- 不要把它们当成 `dynamicTools` 主路径注入给 `codexapp`。
+- 原因：
+  - `dynamicTools` 容易污染 app-server 原生工具集
+  - 会增加拿不到 `spawn_agent` / `wait_agent` / 原生协作工具的风险
+
+### 4. MCP 配置要做成“线程级”而不是“进程级”
+
+- `codexapp` 是长驻 app-server，不是一次一进程的 CLI 调用。
+- 因此 `CC_WEB_SOURCE_SESSION_ID`、`CC_WEB_CROSS_HOP_COUNT` 这类来源上下文，不应只放在 app-server 进程全局环境里。
+- 正确做法是随 `thread/start.config.mcp_servers.ccweb.env` 一起下发，让每个线程拿到自己的来源会话上下文。
+
+### 5. guided input 依赖 plan 协作模式
+
+- `request_user_input` 类能力默认按“协作 / plan 模式可用”来设计。
+- Default / YOLO 模式下，不要假设引导输入一定可用。
+- 如果要做降级：
+  - 优先退回普通文本交互
+  - 不要让整轮对话因为 guided input 不可用而直接失效
+
+### 6. 能力降级要明确而保守
+
+- 如果运行时拒绝 `collaborationMode`（例如 `unknown field collaborationMode` 或 `unsupported collaboration mode`）：
+  - 应记录一次能力降级
+  - 后续本轮可退回普通 turn 发送
+- 但如果只是 `goals` 或 `collaborationMode/list` 探测失败：
+  - 不应直接判定整个 app-server 不可用
+
+### 7. 回归检查要覆盖协议形状，不只看 UI
+
+后续涉及 `codexapp` 的改动，至少要检查这些点：
+
+- `initialize` 后是否真的调用了：
+  - `experimentalFeature/enablement/set`
+  - `collaborationMode/list`
+- `collaborationMode` 存在时：
+  - 顶层是否没有重复 `model`
+  - 顶层是否没有重复 `effort`
+- `ccweb` 能力是否走 `mcpToolCall`，而不是再次退回 `dynamicToolCall`
+- mock / regression 中是否覆盖了上述断言

lib/codex-app-runtime.js

@@ -235,9 +235,10 @@ function createCodexAppRuntime(deps = {}) {
     if (!nextText) return '';
     if (!entry.agentMessageItems) entry.agentMessageItems = new Map();
     const currentItemText = entry.agentMessageItems.get(itemId) || '';
+    const separator = agentMessageSeparator(entry, itemId, nextText);
     entry.agentMessageItems.set(itemId, currentItemText + nextText);
-    entry.fullText = (entry.fullText || '') + nextText;
+    entry.fullText = (entry.fullText || '') + separator + nextText;
-    return nextText;
+    return separator + nextText;
   }
 
   function appendAgentCompletedText(entry, item) {
@@ -252,9 +253,18 @@ function createCodexAppRuntime(deps = {}) {
       return remainder;
     }
     if (currentItemText === text) return '';
+    const separator = agentMessageSeparator(entry, item.id, text);
     entry.agentMessageItems.set(item.id, text);
-    entry.fullText = (entry.fullText || '') + text;
+    entry.fullText = (entry.fullText || '') + separator + text;
-    return text;
+    return separator + text;
+  }
+
+  function agentMessageSeparator(entry, itemId, nextText) {
+    if (entry.agentMessageItems?.get(itemId)) return '';
+    const currentText = entry.fullText || '';
+    if (!/\S/.test(currentText)) return '';
+    const hasVisualBoundary = /\n\s*(?:---|\*\*\*|___)\s*$/.test(currentText) || /^\s*(?:---|\*\*\*|___)\s*\n/.test(String(nextText || ''));
+    return hasVisualBoundary ? '' : '\n\n---\n\n';
   }
 
   function updateToolResult(entry, sessionId, itemId, result, done = false, patch = {}) {

public/app.js

@@ -122,6 +122,7 @@
   let noteMode = false;
   let noteDraftSeq = 0;
   const pendingNotesByTarget = new Map();
+  const userMessageIndex = new Map();
 
   // --- DOM ---
   const $ = (sel) => document.querySelector(sel);
@@ -149,6 +150,8 @@
   const chatAgentMenu = $('#chat-agent-menu');
   const chatRuntimeState = $('#chat-runtime-state');
   const chatCwd = $('#chat-cwd');
+  const userOutlineBtn = $('#user-outline-btn');
+  const userOutlinePanel = $('#user-outline-panel');
   const costDisplay = $('#cost-display');
   const attachmentTray = $('#attachment-tray');
   const pendingNotesTray = $('#pending-notes-tray');
@@ -682,6 +685,79 @@
     return value ? value.slice(0, 8) : '';
   }
 
+  function shortMessagePreview(text, maxLength = 60) {
+    const value = String(text || '').replace(/\s+/g, ' ').trim();
+    if (!value) return '空消息';
+    return value.length > maxLength ? `${value.slice(0, maxLength - 1)}…` : value;
+  }
+
+  function createLocalId(prefix = 'local') {
+    if (window.crypto?.randomUUID) return `${prefix}-${window.crypto.randomUUID()}`;
+    return `${prefix}-${Date.now()}-${Math.random().toString(36).slice(2, 10)}`;
+  }
+
+  function clearUserMessageIndex() {
+    userMessageIndex.clear();
+  }
+
+  function registerUserMessage(messageId, element, content) {
+    if (!messageId || !element) return;
+    userMessageIndex.set(messageId, {
+      id: messageId,
+      element,
+      content: String(content || ''),
+    });
+  }
+
+  function buildUserOutlineItems() {
+    return Array.from(userMessageIndex.values()).map((entry) => ({
+      id: entry.id,
+      targetMessageId: entry.element?.id || '',
+      label: shortMessagePreview(entry.content, 64),
+    })).filter((entry) => entry.targetMessageId);
+  }
+
+  function updateUserOutlinePanel() {
+    if (!userOutlinePanel || !userOutlineBtn) return;
+    const items = buildUserOutlineItems();
+    if (items.length === 0) {
+      userOutlinePanel.innerHTML = '<div class="user-outline-empty">暂无用户消息</div>';
+      userOutlineBtn.disabled = true;
+    } else {
+      userOutlinePanel.innerHTML = items.map((item, index) => `
+        <button type="button" class="user-outline-item" data-target="${escapeHtml(item.targetMessageId)}">
+          <span class="user-outline-index">${index + 1}</span>
+          <span class="user-outline-text">${escapeHtml(item.label)}</span>
+        </button>
+      `).join('');
+      userOutlineBtn.disabled = false;
+    }
+  }
+
+  function closeUserOutlinePanel() {
+    if (!userOutlinePanel || !userOutlineBtn) return;
+    userOutlinePanel.hidden = true;
+    userOutlineBtn.setAttribute('aria-expanded', 'false');
+  }
+
+  function toggleUserOutlinePanel() {
+    if (!userOutlinePanel || !userOutlineBtn) return;
+    if (userOutlinePanel.hidden) {
+      updateUserOutlinePanel();
+      userOutlinePanel.hidden = false;
+      userOutlineBtn.setAttribute('aria-expanded', 'true');
+    } else {
+      closeUserOutlinePanel();
+    }
+  }
+
+  function scrollToMessage(anchorId) {
+    if (!anchorId) return;
+    const target = document.getElementById(anchorId);
+    if (!target) return;
+    target.scrollIntoView({ block: 'start', behavior: 'smooth' });
+  }
+
   function updateSessionIdBadge() {
     if (!chatSessionIdBtn) return;
     if (!currentSessionId) {
@@ -2183,6 +2259,7 @@
 
   function resetChatView(agent) {
     setCurrentAgent(agent);
+    closeUserOutlinePanel();
     closeFileBrowser();
     currentSessionId = null;
     loadedHistorySessionId = null;
@@ -2236,6 +2313,7 @@
     migratePendingNotesToSession(snapshot.sessionId, snapshotAgent);
     setCurrentSessionRunningState(snapshot.isRunning);
     setStatsDisplay(snapshot);
+    closeUserOutlinePanel();
     currentCwd = snapshot.cwd || null;
     updateCwdBadge();
     if (snapshot.mode && MODE_LABELS[snapshot.mode]) {
@@ -2261,6 +2339,7 @@
     const targetAgent = normalizeAgent(agent);
     const { preserveCurrent = true, loadLast = true } = options;
     setCurrentAgent(targetAgent);
+    closeUserOutlinePanel();
     renderSessionList();
 
     const currentMeta = currentSessionId ? getSessionMeta(currentSessionId) : null;
@@ -2353,6 +2432,7 @@
     if (currentSessionId && currentSessionId !== sessionId) {
       send({ type: 'detach_view' });
     }
+    closeUserOutlinePanel();
     clearSessionLoading();
     touchSessionCache(sessionId);
     applySessionSnapshot(snapshot, { immediate: true, suppressUnreadToast: true });
@@ -2361,6 +2441,7 @@
 
   function openSession(sessionId, options = {}) {
     if (!sessionId) return;
+    closeUserOutlinePanel();
     if (options.forceSync) {
       beginSessionSwitch(sessionId, { blocking: options.blocking !== false, force: true, label: options.label });
       return;
@@ -3111,7 +3192,12 @@
     const div = document.createElement('div');
     const isCrossConversation = role === 'user' && !!meta.crossConversation;
     const isCrossConversationReply = isCrossConversation && !!(meta.crossConversation.reply || meta.crossConversation.replyToRequestId);
+    const resolvedMessageId = meta?.messageId || meta?.id || createLocalId('user');
     div.className = `msg ${role}${role === 'assistant' ? ' agent-' + currentAgent : ''}${isCrossConversation ? ' cross-conversation' : ''}${isCrossConversationReply ? ' cross-conversation-reply' : ''}`;
+    if (role === 'user') {
+      div.id = `hapi-message-${resolvedMessageId}`;
+      div.dataset.messageId = resolvedMessageId;
+    }
 
     if (role === 'system') {
       const bubble = document.createElement('div');
@@ -3172,6 +3258,23 @@
         textNode.style.whiteSpace = 'pre-wrap';
         textNode.textContent = content;
         bubble.appendChild(textNode);
+
+        const copyBtn = document.createElement('button');
+        copyBtn.type = 'button';
+        copyBtn.className = 'msg-copy-btn';
+        copyBtn.title = '复制用户消息';
+        copyBtn.setAttribute('aria-label', '复制用户消息');
+        copyBtn.innerHTML = `
+          <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+            <rect x="9" y="9" width="10" height="10" rx="2"></rect>
+            <path d="M5 15H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h8a2 2 0 0 1 2 2v1"></path>
+          </svg>
+        `;
+        copyBtn.addEventListener('click', (event) => {
+          event.stopPropagation();
+          copyTextToClipboard(content, '用户消息已复制');
+        });
+        bubble.appendChild(copyBtn);
       }
       if (attachments.length > 0) {
         bubble.insertAdjacentHTML('beforeend', renderAttachmentPreviews(attachments));
@@ -3186,6 +3289,9 @@
     hydrateAttachmentPreviews(bubble, attachments);
     div.appendChild(avatar);
     div.appendChild(bubble);
+    if (role === 'user') {
+      registerUserMessage(resolvedMessageId, div, content);
+    }
     return div;
   }
 
@@ -3429,6 +3535,209 @@
     return section;
   }
 
+  function parseMaybeJsonObject(value) {
+    if (value && typeof value === 'object') return value;
+    if (typeof value !== 'string') return null;
+    const trimmed = value.trim();
+    if (!trimmed || (!trimmed.startsWith('{') && !trimmed.startsWith('['))) return null;
+    try {
+      const parsed = JSON.parse(trimmed);
+      return parsed && typeof parsed === 'object' ? parsed : null;
+    } catch {
+      return null;
+    }
+  }
+
+  function summarizePrompt(prompt) {
+    const text = typeof prompt === 'string' ? prompt.trim().replace(/\s+/g, ' ') : '';
+    if (!text) return '';
+    return text.length > 140 ? `${text.slice(0, 140)}…` : text;
+  }
+
+  function normalizeCollabAgentData(tool) {
+    const inputData = effectiveObject(tool?.input);
+    const resultData = effectiveObject(tool?.result);
+    const merged = {
+      ...inputData,
+      ...resultData,
+      agentsStates: resultData.agentsStates || inputData.agentsStates || {},
+      receiverThreadIds: resultData.receiverThreadIds || inputData.receiverThreadIds || [],
+      prompt: inputData.prompt || resultData.prompt || '',
+      tool: inputData.tool || resultData.tool || tool?.name || '',
+      status: resultData.status || inputData.status || tool?.meta?.status || null,
+    };
+    return merged;
+  }
+
+  function effectiveObject(value) {
+    const parsed = parseMaybeJsonObject(value);
+    if (parsed && !Array.isArray(parsed)) return parsed;
+    if (value && typeof value === 'object' && !Array.isArray(value)) return value;
+    return {};
+  }
+
+  function collabAgentStateEntries(data) {
+    const states = data?.agentsStates;
+    if (!states || typeof states !== 'object') return [];
+    return Object.entries(states).map(([id, value], index) => {
+      const state = value && typeof value === 'object' ? value : { status: value };
+      const label = String(state.label || state.title || state.nickname || state.name || `子代理 ${index + 1}`);
+      const role = String(state.role || state.agent || state.agentType || '').trim();
+      const status = String(state.status || state.state || 'pending').trim() || 'pending';
+      const detail = String(state.summary || state.lastMessage || state.step || state.description || '').trim();
+      return { id, label, role, status, detail };
+    });
+  }
+
+  function collabStateTone(statusText) {
+    const normalized = String(statusText || '').toLowerCase();
+    if (!normalized) return 'pending';
+    if (/(done|completed|success|finished|idle)/.test(normalized)) return 'done';
+    if (/(fail|error|cancel|aborted|rejected)/.test(normalized)) return 'error';
+    if (/(running|working|active|inprogress|in_progress|executing)/.test(normalized)) return 'running';
+    return 'pending';
+  }
+
+  function collabStateLabel(statusText) {
+    const normalized = String(statusText || '').trim();
+    if (!normalized) return '等待中';
+    const lower = normalized.toLowerCase();
+    if (/(done|completed|success|finished)/.test(lower)) return '已完成';
+    if (/(fail|error|rejected)/.test(lower)) return '失败';
+    if (/(cancel|aborted)/.test(lower)) return '已取消';
+    if (/(running|working|active|inprogress|in_progress|executing)/.test(lower)) return '进行中';
+    if (/(idle|pending|queued|waiting)/.test(lower)) return '等待中';
+    return normalized;
+  }
+
+  function createCollabAgentToolElement(tool) {
+    const data = normalizeCollabAgentData(tool);
+    const wrapper = document.createElement('div');
+    wrapper.className = 'tool-call-content collab-agent-content';
+
+    const stack = document.createElement('div');
+    stack.className = 'collab-agent-stack';
+
+    const header = document.createElement('div');
+    header.className = 'collab-agent-header';
+
+    const titleWrap = document.createElement('div');
+    titleWrap.className = 'collab-agent-title-wrap';
+
+    const kicker = document.createElement('div');
+    kicker.className = 'collab-agent-kicker';
+    kicker.textContent = 'Codex App 子代理';
+    titleWrap.appendChild(kicker);
+
+    const title = document.createElement('div');
+    title.className = 'collab-agent-title';
+    title.textContent = data.tool || '协作任务';
+    titleWrap.appendChild(title);
+
+    const meta = document.createElement('div');
+    meta.className = 'collab-agent-meta';
+    const threadCount = Array.isArray(data.receiverThreadIds) ? data.receiverThreadIds.length : 0;
+    const agentCount = collabAgentStateEntries(data).length;
+    meta.textContent = `${agentCount || threadCount || 0} 个子代理`;
+    titleWrap.appendChild(meta);
+    header.appendChild(titleWrap);
+
+    const statusChip = document.createElement('span');
+    const overallTone = collabStateTone(data.status || (tool.done ? 'completed' : 'running'));
+    statusChip.className = `collab-agent-overall-status ${overallTone}`;
+    statusChip.textContent = collabStateLabel(data.status || (tool.done ? 'completed' : 'running'));
+    header.appendChild(statusChip);
+    stack.appendChild(header);
+
+    const promptText = summarizePrompt(data.prompt);
+    if (promptText) {
+      const promptBlock = document.createElement('div');
+      promptBlock.className = 'collab-agent-prompt';
+      promptBlock.textContent = promptText;
+      stack.appendChild(promptBlock);
+    }
+
+    const stateEntries = collabAgentStateEntries(data);
+    if (stateEntries.length > 0) {
+      const list = document.createElement('div');
+      list.className = 'collab-agent-list';
+      stateEntries.forEach((entry, index) => {
+        const item = document.createElement('div');
+        item.className = 'collab-agent-item';
+
+        const row = document.createElement('div');
+        row.className = 'collab-agent-item-row';
+
+        const label = document.createElement('div');
+        label.className = 'collab-agent-item-label';
+        label.textContent = entry.label || `子代理 ${index + 1}`;
+        row.appendChild(label);
+
+        const chip = document.createElement('span');
+        const tone = collabStateTone(entry.status);
+        chip.className = `collab-agent-item-status ${tone}`;
+        chip.textContent = collabStateLabel(entry.status);
+        row.appendChild(chip);
+        item.appendChild(row);
+
+        if (entry.role) {
+          const role = document.createElement('div');
+          role.className = 'collab-agent-item-role';
+          role.textContent = entry.role;
+          item.appendChild(role);
+        }
+
+        if (entry.detail) {
+          const detail = document.createElement('div');
+          detail.className = 'collab-agent-item-detail';
+          detail.textContent = entry.detail;
+          item.appendChild(detail);
+        }
+
+        if (entry.id) {
+          const footer = document.createElement('div');
+          footer.className = 'collab-agent-item-footer';
+          footer.textContent = `ID ${shortSessionId(entry.id)}`;
+          footer.title = entry.id;
+          footer.addEventListener('click', () => {
+            copyTextToClipboard(entry.id, '子代理线程 ID 已复制');
+          });
+          item.appendChild(footer);
+        }
+
+        list.appendChild(item);
+      });
+      stack.appendChild(list);
+    }
+
+    if (Array.isArray(data.receiverThreadIds) && data.receiverThreadIds.length > 0) {
+      const threads = document.createElement('div');
+      threads.className = 'collab-agent-threads';
+      data.receiverThreadIds.forEach((threadId) => {
+        const btn = document.createElement('button');
+        btn.type = 'button';
+        btn.className = 'collab-agent-thread-chip';
+        btn.textContent = `ID ${shortSessionId(threadId)}`;
+        btn.title = `复制子代理线程 ID\n${threadId}`;
+        btn.addEventListener('click', () => {
+          copyTextToClipboard(threadId, '子代理线程 ID 已复制');
+        });
+        threads.appendChild(btn);
+      });
+      stack.appendChild(threads);
+    }
+
+    if (!promptText && stateEntries.length === 0 && (!Array.isArray(data.receiverThreadIds) || data.receiverThreadIds.length === 0)) {
+      const empty = document.createElement('div');
+      empty.className = 'tool-call-empty';
+      empty.textContent = tool.done ? '子代理调用已结束，未返回结构化状态。' : '等待子代理状态…';
+      stack.appendChild(empty);
+    }
+
+    wrapper.appendChild(stack);
+    return wrapper;
+  }
+
   function isGroupableToolCall(node) {
     return !!(node?.classList?.contains('tool-call') && node.dataset.toolKind !== 'todo_list');
   }
@@ -3508,8 +3817,10 @@
     renderEpoch++;
     const epoch = renderEpoch;
     messagesDiv.innerHTML = '';
+    clearUserMessageIndex();
     if (messages.length === 0) {
       messagesDiv.innerHTML = buildWelcomeMarkup(currentAgent);
+      updateUserOutlinePanel();
       renderPendingNotes({ scroll: false });
       scrollToBottom();
       return;
@@ -3518,6 +3829,7 @@
       const frag = document.createDocumentFragment();
       messages.forEach((message) => frag.appendChild(buildMsgElement(message)));
       messagesDiv.appendChild(frag);
+      updateUserOutlinePanel();
       renderPendingNotes({ scroll: false });
       scrollToBottom();
       return;
@@ -3540,6 +3852,7 @@
     const frag0 = document.createDocumentFragment();
     for (let i = batches[0][0]; i < batches[0][1]; i++) frag0.appendChild(buildMsgElement(messages[i]));
     messagesDiv.appendChild(frag0);
+    updateUserOutlinePanel();
     renderPendingNotes({ scroll: false });
     scrollToBottom();
 
@@ -3556,6 +3869,7 @@
         const frag = document.createDocumentFragment();
         for (let i = start; i < end; i++) frag.appendChild(buildMsgElement(messages[i]));
         messagesDiv.insertBefore(frag, messagesDiv.firstChild);
+        updateUserOutlinePanel();
         // Compensate scrollTop so visible area stays unchanged
         messagesDiv.scrollTop = prevScrollTop + (messagesDiv.scrollHeight - prevHeight);
         updateScrollbar();
@@ -3573,12 +3887,14 @@
     messages.forEach((m) => frag.appendChild(buildMsgElement(m)));
     if (!preserveScroll) {
       messagesDiv.insertBefore(frag, messagesDiv.firstChild);
+      updateUserOutlinePanel();
       if (!skipScrollbar) updateScrollbar();
       return;
     }
     const prevHeight = messagesDiv.scrollHeight;
     const prevScrollTop = messagesDiv.scrollTop;
     messagesDiv.insertBefore(frag, messagesDiv.firstChild);
+    updateUserOutlinePanel();
     messagesDiv.scrollTop = prevScrollTop + (messagesDiv.scrollHeight - prevHeight);
     if (!skipScrollbar) updateScrollbar();
   }
@@ -3754,6 +4070,10 @@
       return wrapper;
     }
 
+    if (kind === 'collab_agent_tool_call') {
+      return createCollabAgentToolElement(tool);
+    }
+
     if (effectiveName === 'AskUserQuestion') {
       const questions = extractAskUserQuestions(effectiveInput);
       if (questions.length > 0) {
@@ -4691,7 +5011,11 @@
   function submitUserMessage(text, attachments = []) {
     const welcome = messagesDiv.querySelector('.welcome-msg');
     if (welcome) welcome.remove();
-    messagesDiv.appendChild(createMsgElement('user', text, attachments));
+    const messageId = createLocalId('user');
+    const element = createMsgElement('user', text, attachments, { messageId });
+    messagesDiv.appendChild(element);
+    registerUserMessage(messageId, element, text);
+    updateUserOutlinePanel();
     scrollToBottom();
 
     send({ type: 'message', text, attachments, sessionId: currentSessionId, mode: currentMode, agent: currentAgent });
@@ -4730,7 +5054,11 @@
         appendError('Codex App 运行中暂不支持 slash 指令插入。');
         return;
       }
-      messagesDiv.appendChild(createMsgElement('user', text, []));
+      const messageId = createLocalId('user');
+      const element = createMsgElement('user', text, [], { messageId });
+      messagesDiv.appendChild(element);
+      registerUserMessage(messageId, element, text);
+      updateUserOutlinePanel();
       scrollToBottom();
       send({ type: 'message', text, sessionId: currentSessionId, mode: currentMode, agent: currentAgent });
       msgInput.value = '';
@@ -4827,6 +5155,20 @@
     });
   }
 
+  if (userOutlineBtn && userOutlinePanel) {
+    userOutlineBtn.addEventListener('click', (e) => {
+      e.stopPropagation();
+      toggleUserOutlinePanel();
+    });
+    userOutlinePanel.addEventListener('click', (e) => {
+      const target = e.target instanceof HTMLElement ? e.target.closest('.user-outline-item') : null;
+      if (!target) return;
+      const anchorId = target.getAttribute('data-target') || '';
+      closeUserOutlinePanel();
+      scrollToMessage(anchorId);
+    });
+  }
+
   // Split new-chat button
   newChatBtn.addEventListener('click', () => showNewSessionModal());
   newChatArrow.addEventListener('click', (e) => {
@@ -4854,6 +5196,11 @@
         e.target !== chatAgentBtn) {
       closeAgentMenu();
     }
+    if (userOutlinePanel && !userOutlinePanel.hidden &&
+        !userOutlinePanel.contains(e.target) &&
+        e.target !== userOutlineBtn) {
+      closeUserOutlinePanel();
+    }
   });
   sendBtn.addEventListener('click', sendMessage);
   if (noteModeBtn) {

public/index.html

@@ -61,20 +61,15 @@
         <button id="menu-btn" class="menu-btn" title="菜单">☰</button>
         <span id="chat-title" class="chat-title">新会话</span>
         <button id="chat-session-id-btn" class="chat-session-id-btn" type="button" title="复制当前会话 ID" hidden>ID</button>
+        <div class="chat-agent-picker">
           <button id="chat-agent-btn" class="chat-agent-btn" type="button" aria-haspopup="menu" aria-expanded="false">Claude</button>
           <div id="chat-agent-menu" class="chat-agent-menu" hidden>
             <button type="button" class="chat-agent-option active" data-agent="claude">Claude</button>
             <button type="button" class="chat-agent-option" data-agent="codex">Codex</button>
             <button type="button" class="chat-agent-option" data-agent="codexapp">Codex App</button>
           </div>
-        <span id="chat-runtime-state" class="chat-runtime-state" hidden>运行中</span>
+        </div>
         <button id="chat-cwd" class="chat-cwd" type="button" hidden></button>
-        <select id="mode-select" class="mode-select" title="权限模式">
-          <option value="yolo">YOLO</option>
-          <option value="default">默认</option>
-          <option value="plan">Plan</option>
-        </select>
-        <span id="cost-display" class="cost-display" hidden></span>
       </header>
 
       <div class="messages-wrap">
@@ -94,6 +89,19 @@
       <div id="cmd-menu" class="cmd-menu" hidden></div>
 
       <div class="input-area">
+        <div class="chat-controls" aria-label="会话控制">
+          <span id="chat-runtime-state" class="chat-runtime-state" hidden>运行中</span>
+          <select id="mode-select" class="mode-select" title="权限模式">
+            <option value="yolo">YOLO</option>
+            <option value="default">默认</option>
+            <option value="plan">Plan</option>
+          </select>
+          <div class="user-outline-anchor">
+            <button id="user-outline-btn" class="user-outline-btn" type="button" aria-expanded="false" aria-controls="user-outline-panel" title="定位用户消息">定位</button>
+            <div id="user-outline-panel" class="user-outline-panel" hidden></div>
+          </div>
+          <span id="cost-display" class="cost-display" hidden></span>
+        </div>
         <div id="attachment-tray" class="attachment-tray" hidden></div>
         <div id="pending-notes-tray" class="pending-notes-tray" hidden></div>
         <div class="input-wrapper">

public/style.css

@@ -887,10 +887,19 @@ body.session-loading-active {
   padding: 0 16px;
   border-bottom: 1px solid var(--border-color);
   background: var(--bg-secondary);
-  gap: 10px;
+  gap: 8px;
   flex-shrink: 0;
   position: relative;
 }
+.chat-controls {
+  position: relative;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex-wrap: wrap;
+  max-width: 800px;
+  margin: 0 auto 8px;
+}
 .menu-btn {
   display: none;
   background: none;
@@ -919,7 +928,7 @@ body.session-loading-active {
 .chat-title:hover { background: var(--bg-tertiary); }
 .chat-session-id-btn {
   appearance: none;
-  max-width: 112px;
+  max-width: 120px;
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
@@ -937,6 +946,19 @@ body.session-loading-active {
   background: rgba(91, 126, 161, 0.16);
   border-color: rgba(91, 126, 161, 0.34);
 }
+.chat-session-id-btn:disabled,
+.chat-agent-btn:disabled,
+.chat-cwd:disabled,
+.mode-select:disabled,
+.user-outline-btn:disabled {
+  opacity: 0.5;
+  cursor: default;
+}
+.chat-agent-picker {
+  position: relative;
+  display: inline-flex;
+  flex-shrink: 0;
+}
 .chat-agent-btn {
   appearance: none;
   font-size: 11px;
@@ -964,8 +986,8 @@ body.session-loading-active {
 }
 .chat-agent-menu {
   position: absolute;
-  top: calc(100% - 6px);
+  top: calc(100% + 6px);
-  right: 16px;
+  left: 0;
   min-width: 148px;
   padding: 8px;
   border: 1px solid var(--border-color);
@@ -1027,6 +1049,78 @@ body.session-loading-active {
   display: none !important;
 }
 .cost-display:empty { display: none; }
+.user-outline-btn {
+  appearance: none;
+  border: 1px solid rgba(91, 126, 161, 0.22);
+  border-radius: 999px;
+  background: rgba(91, 126, 161, 0.08);
+  color: var(--info);
+  padding: 4px 10px;
+  font: inherit;
+  font-size: 11px;
+  font-weight: 800;
+  cursor: pointer;
+  flex-shrink: 0;
+}
+.user-outline-anchor {
+  position: relative;
+  display: inline-flex;
+  flex-shrink: 0;
+}
+.user-outline-btn:hover {
+  background: rgba(91, 126, 161, 0.16);
+  border-color: rgba(91, 126, 161, 0.34);
+}
+.user-outline-panel {
+  position: absolute;
+  right: 0;
+  bottom: calc(100% + 8px);
+  width: min(360px, calc(100vw - 24px));
+  max-height: min(48vh, 360px);
+  padding: 8px;
+  border: 1px solid var(--border-color);
+  border-radius: 14px;
+  background: rgba(255, 252, 248, 0.98);
+  box-shadow: 0 12px 28px rgba(45, 31, 20, 0.08);
+  overflow-y: auto;
+  z-index: 70;
+}
+.user-outline-empty {
+  padding: 8px 10px;
+  color: var(--text-muted);
+  font-size: 12px;
+}
+.user-outline-item {
+  width: 100%;
+  display: grid;
+  grid-template-columns: 24px minmax(0, 1fr);
+  align-items: start;
+  gap: 8px;
+  padding: 8px 10px;
+  border: none;
+  border-radius: 10px;
+  background: transparent;
+  color: var(--text-primary);
+  text-align: left;
+  cursor: pointer;
+}
+.user-outline-item:hover {
+  background: var(--accent-light);
+}
+.user-outline-index {
+  color: var(--text-muted);
+  font-size: 11px;
+  font-weight: 800;
+  line-height: 1.6;
+}
+.user-outline-text {
+  min-width: 0;
+  font-size: 13px;
+  line-height: 1.45;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
 
 /* Mode selector */
 .mode-select {
@@ -1203,6 +1297,7 @@ body.session-loading-active {
 }
 
 .msg-bubble {
+  position: relative;
   padding: 12px 16px;
   border-radius: 16px;
   line-height: 1.65;
@@ -1334,6 +1429,32 @@ body.session-loading-active {
   background: var(--bg-bubble-user);
   color: #fff;
   border-bottom-right-radius: 4px;
+  padding-right: 42px;
+}
+.msg-copy-btn {
+  position: absolute;
+  top: 8px;
+  right: 8px;
+  width: 26px;
+  height: 26px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border: 1px solid rgba(255, 255, 255, 0.16);
+  border-radius: 8px;
+  background: rgba(255, 255, 255, 0.12);
+  color: rgba(255, 255, 255, 0.86);
+  cursor: pointer;
+  opacity: 0;
+  transition: opacity 0.15s ease, background 0.15s ease, border-color 0.15s ease;
+}
+.msg.user:hover .msg-copy-btn,
+.msg.user:focus-within .msg-copy-btn {
+  opacity: 1;
+}
+.msg-copy-btn:hover {
+  background: rgba(255, 255, 255, 0.2);
+  border-color: rgba(255, 255, 255, 0.28);
 }
 .msg.user.cross-conversation .msg-avatar {
   background: var(--info);
@@ -1625,6 +1746,11 @@ body.session-loading-active {
 .tool-call.codex-file-change {
   border-color: rgba(93, 138, 84, 0.24);
 }
+.tool-call.codex-collab-agent-tool-call {
+  border-color: rgba(91, 126, 161, 0.28);
+  background:
+    linear-gradient(180deg, rgba(255, 255, 255, 0.66), rgba(91, 126, 161, 0.04));
+}
 .tool-call summary {
   padding: 8px 12px;
   cursor: pointer;
@@ -1729,6 +1855,14 @@ body.session-loading-active {
   white-space: normal;
   word-break: normal;
 }
+.tool-call-content.collab-agent-content {
+  font-family: inherit;
+  white-space: normal;
+  word-break: normal;
+  background:
+    linear-gradient(180deg, rgba(252, 253, 255, 0.96), rgba(242, 247, 252, 0.98));
+  color: var(--text-primary);
+}
 .tool-call-content.todo-list-content .todo-list-container {
   margin: 0;
 }
@@ -2354,13 +2488,17 @@ body.session-loading-active {
   .option-picker { left: 10px; right: 10px; transform: none; min-width: auto; bottom: 72px; }
   .chat-header {
     padding: 0 10px;
-    gap: 6px;
+    gap: 5px;
   }
   .chat-title {
     font-size: 13px;
   }
+  .chat-controls {
+    gap: 6px;
+    margin-bottom: 6px;
+  }
   .chat-session-id-btn {
-    max-width: 82px;
+    max-width: 92px;
     padding-left: 7px;
     padding-right: 7px;
     font-size: 10px;
@@ -2369,7 +2507,7 @@ body.session-loading-active {
     grid-template-columns: 1fr;
   }
   .chat-agent-menu {
-    right: 10px;
+    left: 0;
     min-width: 138px;
   }
   .chat-runtime-state {
@@ -2377,13 +2515,24 @@ body.session-loading-active {
     font-size: 10px;
   }
   .chat-cwd {
-    max-width: 92px;
+    max-width: 98px;
     flex-shrink: 1;
   }
   .mode-select {
     padding: 4px 20px 4px 8px;
     font-size: 11px;
   }
+  .user-outline-btn {
+    padding: 4px 8px;
+    font-size: 10px;
+  }
+  .user-outline-text {
+    font-size: 12px;
+  }
+  .user-outline-panel {
+    right: 0;
+    width: min(320px, calc(100vw - 20px));
+  }
 }
 
 @media (max-width: 480px) {
@@ -2406,10 +2555,55 @@ body.session-loading-active {
   .new-chat-arrow { min-height: 44px; }
   .new-chat-arrow { width: 48px; }
   .chat-cwd {
+    max-width: 76px;
+    padding-left: 6px;
+    padding-right: 6px;
+  }
+  .chat-controls {
+    display: grid;
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    align-items: stretch;
+  }
+  .chat-cwd,
+  .mode-select,
+  .user-outline-btn,
+  .chat-runtime-state {
+    width: 100%;
+    max-width: none;
+    justify-content: center;
+  }
+  .chat-header {
+    gap: 4px;
+  }
+  .chat-title {
+    min-width: 0;
+  }
+  .chat-session-id-btn {
     max-width: 72px;
     padding-left: 6px;
     padding-right: 6px;
   }
+  .chat-agent-btn {
+    max-width: 96px;
+    padding-left: 8px;
+    padding-right: 20px;
+  }
+  .chat-agent-menu {
+    left: 0;
+    right: auto;
+  }
+  .user-outline-panel {
+    left: 0;
+    right: 0;
+    width: auto;
+    max-height: min(44vh, 300px);
+    bottom: calc(100% + 6px);
+  }
+  .msg-copy-btn {
+    opacity: 1;
+    width: 24px;
+    height: 24px;
+  }
 }
 
 /* === Utility === */
@@ -3360,6 +3554,150 @@ html[data-theme='coolvibe'] .settings-back:hover {
   transition: background 0.2s;
 }
 
+.collab-agent-stack {
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+}
+.collab-agent-header {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 10px;
+}
+.collab-agent-title-wrap {
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+.collab-agent-kicker {
+  font-size: 10px;
+  font-weight: 800;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+  color: var(--info);
+}
+.collab-agent-title {
+  font-size: 14px;
+  font-weight: 700;
+  line-height: 1.35;
+  color: var(--text-primary);
+}
+.collab-agent-meta {
+  font-size: 11px;
+  color: var(--text-muted);
+}
+.collab-agent-overall-status,
+.collab-agent-item-status {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 24px;
+  padding: 0 9px;
+  border-radius: 999px;
+  font-size: 10px;
+  font-weight: 800;
+  line-height: 1;
+  white-space: nowrap;
+}
+.collab-agent-overall-status.running,
+.collab-agent-item-status.running {
+  background: rgba(232, 190, 92, 0.16);
+  color: #9a6f14;
+}
+.collab-agent-overall-status.done,
+.collab-agent-item-status.done {
+  background: rgba(93, 138, 84, 0.14);
+  color: var(--success);
+}
+.collab-agent-overall-status.error,
+.collab-agent-item-status.error {
+  background: rgba(192, 85, 58, 0.14);
+  color: var(--danger);
+}
+.collab-agent-overall-status.pending,
+.collab-agent-item-status.pending {
+  background: rgba(91, 126, 161, 0.12);
+  color: var(--info);
+}
+.collab-agent-prompt {
+  padding: 10px 12px;
+  border: 1px solid rgba(91, 126, 161, 0.16);
+  border-radius: 10px;
+  background: rgba(255, 255, 255, 0.72);
+  color: var(--text-secondary);
+  font-size: 12px;
+  line-height: 1.6;
+}
+.collab-agent-list {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+.collab-agent-item {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  padding: 10px 12px;
+  border: 1px solid rgba(91, 126, 161, 0.14);
+  border-radius: 10px;
+  background: rgba(255, 255, 255, 0.74);
+}
+.collab-agent-item-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+}
+.collab-agent-item-label {
+  min-width: 0;
+  flex: 1;
+  font-size: 13px;
+  font-weight: 700;
+  color: var(--text-primary);
+  line-height: 1.35;
+}
+.collab-agent-item-role {
+  font-size: 11px;
+  color: var(--info);
+  font-weight: 700;
+}
+.collab-agent-item-detail {
+  font-size: 12px;
+  color: var(--text-secondary);
+  line-height: 1.55;
+}
+.collab-agent-item-footer {
+  align-self: flex-start;
+  font-size: 11px;
+  color: var(--text-muted);
+  cursor: pointer;
+}
+.collab-agent-item-footer:hover {
+  color: var(--info);
+}
+.collab-agent-threads {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+}
+.collab-agent-thread-chip {
+  appearance: none;
+  border: 1px solid rgba(91, 126, 161, 0.18);
+  border-radius: 999px;
+  background: rgba(255, 255, 255, 0.8);
+  color: var(--info);
+  padding: 4px 10px;
+  font: inherit;
+  font-size: 11px;
+  font-weight: 700;
+  cursor: pointer;
+}
+.collab-agent-thread-chip:hover {
+  background: rgba(91, 126, 161, 0.1);
+}
+
 /* Todo List */
 .todo-list-container {
   margin: 12px 0;
@@ -3400,6 +3738,13 @@ html[data-theme='coolvibe'] .settings-back:hover {
   color: var(--text-muted);
   opacity: 0.6;
 }
+@media (max-width: 640px) {
+  .collab-agent-header,
+  .collab-agent-item-row {
+    flex-direction: column;
+    align-items: flex-start;
+  }
+}
 .import-item-btn:hover { background: var(--accent-hover); }
 
 /* === File Browser === */

scripts/mock-codex-app-server.js

@@ -161,6 +161,69 @@ function completeTurn(thread, turnId, text, status = 'completed') {
     });
   }
 
+  if (/subagent|collab/i.test(text)) {
+    send({
+      method: 'item/started',
+      params: {
+        threadId: thread.id,
+        turnId,
+        startedAtMs: Date.now(),
+        item: {
+          id: 'tool-collab',
+          type: 'collabAgentToolCall',
+          tool: 'spawn_agent',
+          prompt: '整理前端改动并回报状态',
+          receiverThreadIds: ['child-thread-a', 'child-thread-b'],
+          agentsStates: {
+            'child-thread-a': {
+              name: '实现代理',
+              role: 'frontend',
+              status: 'in_progress',
+              summary: '正在补充结构化渲染与样式',
+            },
+            'child-thread-b': {
+              name: '验证代理',
+              role: 'qa',
+              status: 'completed',
+              summary: '已完成基础事件链检查',
+            },
+          },
+          status: 'inProgress',
+        },
+      },
+    });
+    send({
+      method: 'item/completed',
+      params: {
+        threadId: thread.id,
+        turnId,
+        completedAtMs: Date.now(),
+        item: {
+          id: 'tool-collab',
+          type: 'collabAgentToolCall',
+          tool: 'spawn_agent',
+          prompt: '整理前端改动并回报状态',
+          receiverThreadIds: ['child-thread-a', 'child-thread-b'],
+          agentsStates: {
+            'child-thread-a': {
+              name: '实现代理',
+              role: 'frontend',
+              status: 'completed',
+              summary: '结构化渲染已完成',
+            },
+            'child-thread-b': {
+              name: '验证代理',
+              role: 'qa',
+              status: 'completed',
+              summary: '事件链与持久化检查通过',
+            },
+          },
+          status: 'completed',
+        },
+      },
+    });
+  }
+
   send({
     method: 'thread/tokenUsage/updated',
     params: {

scripts/regression.js

@@ -811,6 +811,17 @@ async function main() {
     assert(/"hasCcwebMcpConfig": true/.test(codexAppDynamicTool.result || ''), 'Codex App thread/start should pass ccweb MCP config');
     await nextMessage(messages, ws, (msg) => msg.type === 'done' && msg.sessionId === codexAppSession.sessionId);
 
+    ws.send(JSON.stringify({ type: 'message', text: 'codexapp subagent prompt', sessionId: codexAppSession.sessionId, mode: 'yolo', agent: 'codexapp' }));
+    const codexAppCollabTool = await nextMessage(messages, ws, (msg) => msg.type === 'tool_end' && msg.sessionId === codexAppSession.sessionId && msg.toolUseId === 'tool-collab');
+    assert(codexAppCollabTool.kind === 'collab_agent_tool_call', 'Codex App should surface collab agent tool calls');
+    assert(/child-thread-a/.test(codexAppCollabTool.result || ''), 'Codex App collab tool should include child thread ids');
+    await nextMessage(messages, ws, (msg) => msg.type === 'done' && msg.sessionId === codexAppSession.sessionId);
+    storedCodexApp = JSON.parse(fs.readFileSync(path.join(sessionsDir, `${codexAppSession.sessionId}.json`), 'utf8'));
+    const hasCollabTool = storedCodexApp.messages
+      .flatMap((message) => Array.isArray(message.toolCalls) ? message.toolCalls : [])
+      .some((tool) => tool.kind === 'collab_agent_tool_call');
+    assert(hasCollabTool, 'Codex App collab tool should be persisted into session history');
+
     ws.send(JSON.stringify({ type: 'message', text: 'codexapp collaboration plan probe', sessionId: codexAppSession.sessionId, mode: 'plan', agent: 'codexapp' }));
     const codexAppPlanCollab = await nextMessage(messages, ws, (msg) => msg.type === 'text_delta' && msg.sessionId === codexAppSession.sessionId && /collaboration mode:/.test(msg.text || ''));
     assert(/"mode":"plan"/.test(codexAppPlanCollab.text || ''), 'Codex App Plan mode should pass plan collaboration mode');