优化: ai-chat 对话流布局与轨迹信息密度改造

- 分组行去统计化,调用统计归并轨迹卡头部
- 相对时间改时间分隔线,跨日显绝对时间
- 思考过程单行 pill 化,答案卡加 accent 边
- 工具卡短路径展示与耗时提示统一
- 高风险工具名单启动时同步后端注册表
- 自动重试改琥珀细条,红卡与手动重试仅终态
- 轨迹卡头并时间线行,显轮次号与绝对时间
- 运行中摘要补当前工具名与失败计数
- 执行中工具卡加实时计时,耗时统一人话口径
- 重试残留清理改标记匹配,替代中文子串硬编码

src/components/ToolCard.vue

@@ -14,10 +14,10 @@
       <div class="ai-tool-header-text">
         <span class="ai-tool-name">{{ toolDisplayName(tc) }}</span>
         <span v-if="tc.status === 'running'" class="ai-tool-sub">{{ $t('aiTool.running') }}</span>
-        <span v-else-if="isFailed" class="ai-tool-sub ai-tool-sub--failed">{{ $t('aiTool.executionFailed') }}</span>
-        <span v-else-if="toolResultSummary(tc)" class="ai-tool-sub">{{ toolResultSummary(tc) }}</span>
+        <span v-else-if="isFailed" class="ai-tool-sub ai-tool-sub--failed" :title="summaryTitle">{{ $t('aiTool.executionFailed') }}</span>
+        <span v-else-if="toolResultSummary(tc)" class="ai-tool-sub" :title="summaryTitle">{{ toolResultSummary(tc) }}</span>
       </div>
-      <span class="ai-tool-status-dot" :class="'ai-tool-status-dot--' + (isFailed ? 'failed' : tc.status)"></span>
+      <span class="ai-tool-status-dot" :class="'ai-tool-status-dot--' + (isFailed ? 'failed' : tc.status)" :title="statusTitle"></span>
       <!-- 统一卡形态第4要素:耗时(前端 startedAt/completedAt 差;历史消息无时间戳隐藏不显 0)。
            hover 显绝对起止时刻,相对时间不再占卡片行(B 聚合卡统一)。 -->
       <span
@@ -144,7 +144,7 @@
 </template>
 
 <script setup lang="ts">
-import { computed, toRef } from 'vue'
+import { computed, ref, toRef, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import {
   shouldKeepOpen,
@@ -152,12 +152,14 @@ import {
   toolCategory,
   toolIcon,
   toolResultSummary,
+  argString,
 } from '@/composables/ai/useToolCard'
 import { parseDiffLines } from '@/composables/ai/useToolCardRender'
 import { useToolCardHeader } from '@/composables/ai/useToolCardHeader'
 import { useToolApproval } from '@/composables/ai/useToolApproval'
+import { useTimerOwnership } from '@/composables/useTimerOwnership'
 import { callDurationText } from '@/composables/ai/useTurnTrace'
-import { formatDate } from '@/utils/time'
+import { formatDate, formatDuration } from '@/utils/time'
 import type { AiToolCallInfo } from '@/api/types'
 import ConfirmDialog from './ConfirmDialog.vue'
 import ToolResultBody from './ToolResultBody.vue'
@@ -241,14 +243,57 @@ const isFailed = computed(() => {
 /** write_file 审批 diff 行解析(复用 parseDiffLines 纯函数,数据源 props.tc.diff) */
 const diffLines = computed(() => parseDiffLines(props.tc.diff))
 
-/** 单卡耗时(前端时间差;历史消息无 startedAt/completedAt 返空串隐藏) */
-const durationText = computed(() => callDurationText(props.tc.startedAt, props.tc.completedAt))
-/** hover 提示:绝对起止时刻(相对时长 hover 可溯具体时间) */
+// 执行中实时走表:进入 running 每秒刷新 nowTick,离开时清理(定时器经 useTimerOwnership
+// 注册,onUnmounted 自动全清,防组件卸载后计时器仍触发)
+const { setOwnInterval, clearOwnInterval } = useTimerOwnership()
+const nowTick = ref(Date.now())
+let runTimerId: ReturnType<typeof setInterval> | null = null
+watch(() => props.tc.status, (s) => {
+  if (s === 'running') {
+    nowTick.value = Date.now()
+    if (runTimerId === null) {
+      runTimerId = setOwnInterval(() => { nowTick.value = Date.now() }, 1000)
+    }
+  } else if (runTimerId !== null) {
+    clearOwnInterval(runTimerId)
+    runTimerId = null
+  }
+}, { immediate: true })
+
+/** 单卡耗时(前端时间差;历史消息无 startedAt/completedAt 返空串隐藏);
+ *  running 态以 nowTick 实时走表(需 startedAt,与完成态共用同一时间差口径) */
+const durationText = computed(() => {
+  const tc = props.tc
+  if (tc.status === 'running' && tc.startedAt != null) {
+    return formatDuration(nowTick.value - tc.startedAt, true)
+  }
+  return callDurationText(tc.startedAt, tc.completedAt)
+})
+/** hover 提示:后端实测毫秒 + 绝对起止时刻(run_command 取 duration_ms、http_request 取
+ *  elapsed_ms,与前端时间差口径互证;无后端耗时的工具只显起止时刻) */
 const durationTitle = computed(() => {
   const tc = props.tc
   if (tc.startedAt == null || tc.completedAt == null) return ''
-  return `${formatDate(tc.startedAt)} ~ ${formatDate(tc.completedAt)}`
+  const r = parsed.value
+  const backendMs = tc.name === 'run_command'
+    ? (typeof r?.duration_ms === 'number' ? r.duration_ms : null)
+    : (tc.name === 'http_request' && typeof r?.elapsed_ms === 'number' ? r.elapsed_ms : null)
+  const span = `${formatDate(tc.startedAt)} ~ ${formatDate(tc.completedAt)}`
+  return backendMs != null ? `${backendMs}ms · ${span}` : span
 })
+
+/** 状态点 tooltip:成功/失败/进行中/待审批/已拒绝(绿红蓝点 hover 可读,不再靠颜色猜) */
+const statusTitle = computed(() => {
+  const s = props.tc.status
+  if (s === 'running') return t('aiTool.statusRunning')
+  if (s === 'pending_approval') return t('aiTool.statusPending')
+  if (s === 'rejected') return t('aiTool.statusRejected')
+  if (s === 'completed') return isFailed.value ? t('aiTool.statusFailed') : t('aiTool.statusOk')
+  return ''
+})
+
+/** 头部摘要 hover 回看完整路径(摘要统一缩略尾段,全路径走 title;路径类工具才有值) */
+const summaryTitle = computed(() => argString(props.tc.args, 'path'))
 </script>
 
 <style scoped>

src/components/ToolCardList.vue

@@ -1,6 +1,6 @@
 <template>
   <div class="ai-tool-calls" ref="rootEl">
-    <!-- 顶部操作栏：批量审批(全局收起已下沉到首个可折叠分组标题行,U-260618) -->
+    <!-- 顶部操作栏：批量审批(轨迹卡 toggle 已覆盖整体展开/收起,分组行仅单组导航) -->
     <div v-if="pendingCount > 0" class="ai-tool-topbar">
       <!-- 批量操作栏（存在待审批项时显示） -->
       <div class="ai-batch-approve">
@@ -14,22 +14,12 @@
     </div>
 
     <template v-for="(group, gi) in groupedToolCalls" :key="group.name">
-      <!-- 分组标题：同名工具 >=2 个时显示(B 聚合卡统一:默认行「N 次调用 · 成功 x 失败 y」,
-           点开逐条;成功/失败与状态点同一套 isToolFailure 判定,文案走 ai.trace 同源 key) -->
+      <!-- 分组标题：同名工具 >=2 个时显示(仅分组导航语义:点开逐条。
+           调用统计收敛到执行轨迹卡头部一处,分组行不再重复计数) -->
       <div v-if="group.calls.length >= 2" class="ai-tool-group-header" @click="toggleGroupCollapse(gi)">
         <span class="ai-tool-group-icon" v-html="groupIcon(group.name)"></span>
         <span class="ai-tool-group-name">{{ groupDisplayName(group) }}</span>
-        <span class="ai-tool-group-agg">{{ groupAggText(group) }}</span>
         <span class="ai-tool-group-chevron" :class="{ 'is-open': !isGroupCollapsed(gi) }">▸</span>
-        <!-- 全部展开/收起(U-260618:从 topbar 下沉到首个可折叠分组标题行尾巴,与 run command 同行) -->
-        <div
-          v-if="gi === firstCollapsibleGi"
-          class="ai-tool-global-toggle"
-          @click.stop="toggleAllGroups"
-        >
-          <span class="ai-tool-global-toggle-icon">{{ allGroupsExpanded ? '▾' : '▸' }}</span>
-          <span>{{ allGroupsExpanded ? $t('aiTool.collapseAll') : $t('aiTool.expandAll') }}</span>
-        </div>
       </div>
       <ToolCard
         v-for="tc in group.calls"
@@ -52,7 +42,6 @@ import { ref, computed, watch, nextTick, onMounted, onBeforeUnmount } from 'vue'
 import { useI18n } from 'vue-i18n'
 import ToolCard from './ToolCard.vue'
 import { listen, type UnlistenFn } from '@tauri-apps/api/event'
-import { aggregateCalls, turnSummaryText } from '@/composables/ai/useTurnTrace'
 import type { AiToolCallInfo } from '@/api/types'
 
 // useI18n needed for $t() in template (collapseAll / expandAll) + groupDisplayName(i18n key)
@@ -124,32 +113,11 @@ const groupedToolCalls = computed<ToolCallGroup[]>(() => {
   return groups
 })
 
-/** 可折叠分组数（calls >= 2 的组），控制全局按钮显隐 */
-const collapsibleGroupCount = computed(() =>
-  groupedToolCalls.value.filter(g => g.calls.length >= 2).length
-)
-
-/** 首个可折叠分组索引全部展开/收起按钮下沉到此分组标题行尾巴) */
-const firstCollapsibleGi = computed(() => {
-  for (let i = 0; i < groupedToolCalls.value.length; i++) {
-    if (groupedToolCalls.value[i].calls.length >= 2) return i
-  }
-  return -1
-})
-
 /** 待审批工具数（status === 'pending_approval'），控制批量操作栏显隐 */
 const pendingCount = computed(() =>
   props.toolCalls.filter(tc => tc.status === 'pending_approval').length
 )
 
-/** 是否所有可折叠分组都已展开 */
-const allGroupsExpanded = computed(() => {
-  if (collapsibleGroupCount.value === 0) return true
-  return groupedToolCalls.value.every((g, gi) =>
-    g.calls.length < 2 || !collapsedGroups.value.has(gi)
-  )
-})
-
 /**
  * 默认收起补齐：达到多卡阈值(>=2)且用户未手动操作过的组自动收起。
  * 响应式而非一次性初始化——流式场景第一张卡到达即触发旧一次性逻辑,
@@ -181,24 +149,6 @@ function toggleGroupCollapse(gi: number): void {
   collapsedGroups.value = next
 }
 
-/** 全部展开 / 全部收起切换 */
-function toggleAllGroups(): void {
-  const next = new Set<number>()
-  // 全部记 touched:批量操作针对当前可见组,流式新增组仍走默认收起,
-  // 但已有组不得被补齐逻辑收回(否则"全部展开"点完即被回退)
-  for (const g of groupedToolCalls.value) {
-    if (g.calls.length >= 2) userTouchedGroups.value.add(g.name)
-  }
-  if (allGroupsExpanded.value) {
-    // 当前全展开 → 全部收起
-    for (let i = 0; i < groupedToolCalls.value.length; i++) {
-      if (groupedToolCalls.value[i].calls.length >= 2) next.add(i)
-    }
-  }
-  // 当前非全展开 → 全部展开（next 保持空 Set）
-  collapsedGroups.value = next
-}
-
 /**
  * 分组显示名：工具名 → i18n 友好标签(英文化,原硬编码中文)。
  * 用 aiTool.toolGroup.* 子键查表;未命中的工具回退 _ → 空格风格。
@@ -228,11 +178,6 @@ function groupDisplayName(group: ToolCallGroup): string {
   return group.name.replace(/_/g, ' ')
 }
 
-/** 分组聚合行文案:「N 次调用 · 成功 x 失败 y」(零值项省略;与单卡状态点同源 isToolFailure 判定) */
-function groupAggText(group: ToolCallGroup): string {
-  return turnSummaryText(aggregateCalls(group.calls))
-}
-
 /**
  * 单卡是否展开：
  * - 分组已折叠 → false（整组隐藏）
@@ -414,28 +359,6 @@ function groupIcon(name: string): string {
 }
 .ai-btn--danger:hover { filter: brightness(1.1); }
 
-/* -- 全部展开/收起从 topbar 下沉到分组标题行,移除独立按钮 padding/背景,
-      高度=文字行高,不撑高分组标题行;融入标题视觉,仅 hover 变色) -- */
-.ai-tool-global-toggle {
-  display: flex;
-  align-items: center;
-  gap: 4px;
-  cursor: pointer;
-  user-select: none;
-  font-size: 11px;
-  color: var(--df-text-dim);
-  transition: color 0.15s var(--df-ease);
-  /* 推到分组标题行尾巴右对齐 */
-  margin-left: auto;
-}
-.ai-tool-global-toggle:hover {
-  color: var(--df-text-secondary);
-}
-.ai-tool-global-toggle-icon {
-  font-size: 10px;
-  transition: transform 0.15s var(--df-ease);
-}
-
 /* -- 分组标题 -- */
 .ai-tool-group-header {
   display: flex;
@@ -464,17 +387,8 @@ function groupIcon(name: string): string {
   font-weight: 500;
   color: var(--df-text-secondary);
 }
-/* 聚合行「N 次调用 · 成功 x 失败 y」:弱化等宽,与单卡耗时同视觉层级 */
-.ai-tool-group-agg {
-  font-family: var(--df-font-mono);
-  font-size: 10px;
-  color: var(--df-text-dim);
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
 .ai-tool-group-chevron {
-  /* 移除 margin-left:auto,让全部展开/收起按钮(global-toggle)占据行尾右对齐 */
+  margin-left: auto;
   font-size: 10px;
   color: var(--df-text-dim);
   transition: transform 0.15s var(--df-ease);

src/components/ToolResultBody.vue

@@ -6,7 +6,7 @@
   <div v-if="tc.name === 'read_file' && tc.result && tc.status === 'completed' && parsed" class="ai-tool-file-content">
     <div class="ai-tool-file-bar">
       <span class="ai-tool-file-icon" v-html="fileIcon"></span>
-      <span class="ai-tool-file-path">{{ parsed?.path }}</span>
+      <span class="ai-tool-file-path" :title="parsed?.path">{{ shortPath(parsed?.path || '') }}</span>
       <!-- BUG-260625-02: search 模式返回 matches(命中行)非 content,
            旧模板取 lines/returned_lines 显「0 行」+ 空 content 区,用户误以为读取失败。
            search 模式显搜索词 + 命中数(复用 grepHitsN 文案);默认模式显行数/大小 + 展开。 -->
@@ -36,7 +36,7 @@
   <div v-else-if="tc.name === 'list_directory' && tc.result && tc.status === 'completed' && parsed" class="ai-tool-dir-list">
     <div class="ai-tool-file-bar">
       <span class="ai-tool-file-icon ai-tool-file-icon--dir" v-html="dirIcon"></span>
-      <span class="ai-tool-file-path">{{ parsed?.path }}</span>
+      <span class="ai-tool-file-path" :title="parsed?.path">{{ shortPath(parsed?.path || '') }}</span>
       <span class="ai-tool-file-meta">{{ parsed?.entries?.length || 0 }} {{ $t('aiTool.items') }}</span>
       <span v-if="parsed?.truncated" class="ai-tool-file-meta ai-tool-file-meta--warn">{{ $t('aiTool.dirTruncated', { n: DIR_TRUNCATE_LIMIT }) }}</span>
     </div>
@@ -59,7 +59,7 @@
   <div v-else-if="tc.name === 'search_files' && tc.result && tc.status === 'completed' && parsed" class="ai-tool-dir-list">
     <div class="ai-tool-file-bar">
       <span class="ai-tool-file-icon ai-tool-file-icon--dir" v-html="dirIcon"></span>
-      <span class="ai-tool-file-path">{{ parsed?.path }}</span>
+      <span class="ai-tool-file-path" :title="parsed?.path">{{ shortPath(parsed?.path || '') }}</span>
       <span v-if="parsed?.pattern" class="ai-tool-file-meta">「{{ parsed?.pattern }}」</span>
       <span class="ai-tool-file-meta">{{ $t('aiTool.foundN', { n: typeof parsed?.total === 'number' ? parsed.total : (parsed?.results?.length || 0) }) }}</span>
     </div>
@@ -77,7 +77,7 @@
   <div v-else-if="tc.name === 'grep' && tc.result && tc.status === 'completed' && parsed" class="ai-tool-grep-result">
     <div class="ai-tool-file-bar">
       <span class="ai-tool-file-icon" v-html="searchIcon"></span>
-      <span class="ai-tool-file-path">{{ parsed?.path }}</span>
+      <span class="ai-tool-file-path" :title="parsed?.path">{{ shortPath(parsed?.path || '') }}</span>
       <span v-if="parsed?.pattern" class="ai-tool-file-meta">「{{ parsed?.pattern }}」</span>
       <span class="ai-tool-file-meta">{{ grepHitLabel }}</span>
       <span v-if="parsed?.truncated" class="ai-tool-file-meta ai-tool-file-meta--warn">{{ $t('aiTool.grepTruncated') }}</span>
@@ -114,7 +114,7 @@
   <!-- write_file 结果 -->
   <div v-else-if="tc.name === 'write_file' && tc.result && tc.status === 'completed' && parsed" class="ai-tool-write-result">
     <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="var(--df-success)" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M22 11.08V12a10 10 0 11-5.93-9.14"/><polyline points="22 4 12 14.01 9 11.01"/></svg>
-    <span class="ai-tool-write-path">{{ parsed?.path }}</span>
+    <span class="ai-tool-write-path" :title="parsed?.path">{{ shortPath(parsed?.path || '') }}</span>
     <span class="ai-tool-write-meta">{{ formatBytes(parsed?.bytes_written) }} {{ $t('aiTool.written') }}</span>
     <span v-if="typeof parsed?.old_size === 'number' && parsed.old_size > 0" class="ai-tool-write-meta">{{ $t('aiTool.writeOverwrite', { old: formatBytes(parsed.old_size), neww: formatBytes(parsed?.bytes_written) }) }}</span>
     <span v-if="typeof parsed?.encoding === 'string' && parsed.encoding !== 'utf-8'" class="ai-tool-write-meta">{{ $t('aiTool.encodingLabel', { enc: parsed.encoding }) }}</span>
@@ -125,7 +125,7 @@
   <div v-else-if="tc.name === 'patch_file' && tc.result && tc.status === 'completed' && parsed" class="ai-tool-patch-result">
     <div class="ai-tool-file-bar">
       <span class="ai-tool-file-icon" v-html="fileIcon"></span>
-      <span class="ai-tool-file-path">{{ parsed?.path }}</span>
+      <span class="ai-tool-file-path" :title="parsed?.path">{{ shortPath(parsed?.path || '') }}</span>
       <span class="ai-tool-file-meta">{{ formatSizeDiff(parsed?.size_diff) }} {{ $t('aiTool.bytesUnit') }}</span>
       <span v-if="parsed?.matches_found && parsed.matches_found > 1" class="ai-tool-file-meta">{{ $t('aiTool.patchedMatches', { n: parsed.matches_found }) }}</span>
     </div>
@@ -231,6 +231,7 @@ import {
   combineOutputs,
   formatToolResult,
   formatGrep,
+  shortPath,
   dirIcon,
   fileIcon,
   searchIcon,

src/components/ai/MessageList.vue

@@ -21,11 +21,11 @@ import { useMarkdown } from '../../composables/useMarkdown'
 import { useMessageScroll } from '../../composables/ai/useMessageScroll'
 import { useStreamRenderer } from '../../composables/ai/useStreamRenderer'
 import { loadMoreHistory, getLoadMoreState } from '../../composables/ai/useAiConversations'
-import { collectTurnStats, turnSummaryText, type TurnCallStats } from '../../composables/ai/useTurnTrace'
+import { collectTurnStats, turnSummaryText, sumTurnTokens, formatTokensK, type TurnCallStats } from '../../composables/ai/useTurnTrace'
 import ToolCardList from '../ToolCardList.vue'
 import MessageItem from './MessageItem.vue'
 import EmptyState from './EmptyState.vue'
-import { formatRelative, formatDate } from '../../utils/time'
+import { formatDate, formatAbsolute } from '../../utils/time'
 import type { AiMessage } from '../../api/types'
 
 defineProps<{
@@ -107,10 +107,7 @@ function shouldRenderMsg(msg: AiMessage): boolean {
   return true
 }
 
-/** token 数格式化:<1000 原值,≥1000 用 k(如 1234→1.2k) */
-function formatTokens(n: number): string {
-  return n >= 1000 ? `${(n / 1000).toFixed(1)}k` : String(n)
-}
+/** token 数格式化收敛到 useTurnTrace.formatTokensK(与轨迹卡头部汇总同一格式化出口) */
 
 // ── token 分项显示(2026-08-02):in/cache/out/reason 分计费 + 详情面板 ──
 //
@@ -589,6 +586,8 @@ function canOpenSettings(msg: AiMessage): boolean {
  * retryable 推断依据后端 error_type(本批前端推断;后端 AiStreamRetry/AiError 加 retryable 字段下批 df-ai 增强)。
  */
 function canRetry(msg: AiMessage): boolean {
+  // 重试过渡气泡(isRetry)非终态错误,不提供重试入口(终态 AiError 才有重试按钮)
+  if (msg.isRetry) return false
   const et = (msg as AiMessageWithErrorType).errorType
   // auth/provider_config = Fatal(鉴权/配置错),重试无意义
   if (et === 'auth' || et === 'provider_config') return false
@@ -741,6 +740,44 @@ function toggleTrace(key: string): void {
   expandedTraceIds.value = next
 }
 
+// UX 密度改造:轨迹内每轮思考单行 pill(灯泡+单行截断+右端 token 小字),点击展开完整思考段落。
+// 展开态按 msg.id 记忆,与轨迹卡展开态(expandedTraceIds)互不影响。
+const expandedThinkIds = ref<Set<string>>(new Set())
+function toggleThink(id: string): void {
+  const next = new Set(expandedThinkIds.value)
+  if (next.has(id)) next.delete(id)
+  else next.add(id)
+  expandedThinkIds.value = next
+}
+
+/** 轮次思考纯文本(压平 markdown 换行;空内容回退「过程记录」,纯工具轮也有锚点) */
+function thinkPlainText(m: AiMessage): string {
+  return (m.content || '').replace(/\s+/g, ' ').trim()
+}
+/** pill 单行文本:纯文本截断 + 空轮回退文案(title 承载全文,此处只管单行) */
+function thinkSnippet(m: AiMessage): string {
+  const txt = thinkPlainText(m)
+  return txt || t('ai.trace.processOnly')
+}
+/** pill hover title:完整思考文本(超长截断防 tooltip 卡顿) */
+function thinkFullText(m: AiMessage): string {
+  const txt = thinkPlainText(m)
+  if (!txt) return t('ai.trace.processOnly')
+  return txt.length > 500 ? txt.slice(0, 500) + '…' : txt
+}
+/** 思考 pill 右端 token 小字:「30.3k in(估算) · 0 cache · 157 out」(无 token 数据返回空串隐藏) */
+function roundTokenText(m: AiMessage): string {
+  if (!m.tokenUsage && m.prompt_tokens == null) return ''
+  const est = tokenEstimated(m) ? `(${t('aiChat.estimated')})` : ''
+  const parts = [
+    `${formatTokensK(tokenInOf(m))} in${est}`,
+    `${formatTokensK(tokenCacheOf(m))} cache`,
+    `${formatTokensK(tokenOutOf(m))} out`,
+  ]
+  if (tokenReasonOf(m) > 0) parts.push(`${formatTokensK(tokenReasonOf(m))} reason`)
+  return parts.join(' · ')
+}
+
 /** 轨迹卡聚合行:「N 次调用 · 成功 x 失败 y · 总耗时 T」(拼装统一走 useTurnTrace.turnSummaryText) */
 function traceAggText(stats: TurnCallStats, startTs: number, endTs: number): string {
   return turnSummaryText(stats, endTs - startTs)
@@ -751,9 +788,13 @@ function traceHoverTitle(startTs: number, endTs: number): string {
   return `${formatDate(startTs)} ~ ${formatDate(endTs)}`
 }
 
-/** 执行中实时步骤摘要:「✓ N 次调用完成 · 正在 {工具} · ⏳ N 项待审批」(由最近工具事件聚合) */
-function stepText(s: TurnCallStats): string {
-  const parts: string[] = []
+/**
+ * 执行中实时步骤摘要:「第 N 轮 · ✓ N 次调用完成 · 失败 N · 正在 {工具} · ⏳ N 项待审批」。
+ * 轮次号与轨迹卡同源(flushBucket 的 traceCount,执行中=将成为的轨迹序号);
+ * 失败/拒绝/待审批段仅非零时显示;全部无数据回退「过程记录」。
+ */
+function stepText(s: TurnCallStats, round: number): string {
+  const parts: string[] = [t('ai.trace.roundN', { n: round })]
   const done = s.ok + s.fail
   if (done > 0) parts.push(t('ai.trace.stepDone', { n: done }))
   if (s.fail > 0) parts.push(t('ai.trace.fail', { n: s.fail }))
@@ -764,11 +805,14 @@ function stepText(s: TurnCallStats): string {
 }
 
 type RenderItem =
-  | { kind: 'msg'; key: string; msg: AiMessage }
+  | { kind: 'msg'; key: string; msg: AiMessage; final?: boolean }
   | { kind: 'sep'; key: string; seg: MessageSegment & { key: string } }
-  // A 过程压缩:完成轮次的执行轨迹卡(traceMsgs 为折叠在内的过程消息)与执行中的实时步骤摘要
-  | { kind: 'trace'; key: string; stats: TurnCallStats; startTs: number; endTs: number; traceMsgs: AiMessage[]; expanded: boolean }
-  | { kind: 'step'; key: string; stats: TurnCallStats }
+  // A 过程压缩:完成轮次的执行轨迹卡(traceMsgs 为折叠在内的过程消息)与执行中的实时步骤摘要;
+  // round=轨迹序号(卡头「第 N 轮」,与执行中步骤行、轮次导航条同一计数来源)
+  | { kind: 'trace'; key: string; round: number; stats: TurnCallStats; startTs: number; endTs: number; tokens: number; traceMsgs: AiMessage[]; expanded: boolean }
+  | { kind: 'step'; key: string; round: number; stats: TurnCallStats }
+  // UX 密度改造:相邻消息间隔 ≥30 分钟或跨天的居中时间分隔线(替代 per-block 相对时间)
+  | { kind: 'timesep'; key: string; ts: number }
 
 /**
  * 渲染项(A 过程压缩):在归档分段之上叠加轮次折叠。
@@ -776,12 +820,44 @@ type RenderItem =
  * 轮次 = 末条 user 之后的连续 assistant 消息(错误气泡/压缩摘要/归档分段不进桶,原样渲染)。
  * - 执行中:仅末条消息(当前步骤)展开,先前步骤收进一行实时摘要(step 项,由工具事件聚合)。
  * - 完成:轮次内除最终答复外的过程消息折叠为一张执行轨迹卡(trace 项,默认一行聚合),
- *   点开回看;用户手动展开记入 expandedTraceIds 不被收回。正文区只留最终答复。
+ *   点开在卡内 rail 面板回看(每轮思考 pill + 工具卡);用户手动展开记入 expandedTraceIds
+ *   不被收回。正文区只留最终答复。
  * 无过程消息的轮次(单轮问答)零改动原样渲染。
+ *
+ * UX 密度改造:相邻消息间隔 ≥30 分钟或跨天时插居中时间分隔线(timesep 项),
+ * per-block 相对时间已移除。轨距追踪 lastMsgTs 只在消息桶边界推进,
+ * 轨迹卡与其内部轮次之间不插线(同轮间隔无叙事价值)。轨迹桶自身也不再发
+ * timesep 行:卡头「第 N 轮」+ 绝对起始时刻已承载时间行职责(两行合一)。
  */
+const TIME_SEP_GAP_MS = 30 * 60 * 1000
+let lastMsgTs = 0
+
+/** 与上一条已渲染消息是否需要时间分隔线(间隔 ≥30 分钟或跨天;首条不插) */
+function needsTimeSep(ts: number): boolean {
+  if (!lastMsgTs || !ts) return false
+  if (Math.abs(ts - lastMsgTs) >= TIME_SEP_GAP_MS) return true
+  const a = new Date(lastMsgTs)
+  const b = new Date(ts)
+  return a.getFullYear() !== b.getFullYear()
+    || a.getMonth() !== b.getMonth()
+    || a.getDate() !== b.getDate()
+}
+
+/** 需要时插 timesep 项并推进 lastMsgTs(同一出口防漏插/重插) */
+function pushTimeSepIfNeeded(items: RenderItem[], ts: number): void {
+  if (needsTimeSep(ts)) {
+    items.push({ kind: 'timesep', key: 'tsep-' + ts + '-' + items.length, ts })
+  }
+  lastMsgTs = ts
+}
+
 const renderItems = computed<RenderItem[]>(() => {
   const items: RenderItem[] = []
   let bucket: AiMessage[] = []
+  lastMsgTs = 0
+  // 轨迹序号计数:轨迹卡头「第 N 轮」与执行中步骤行同一来源(computed 重算从 0 起,
+  // 计数即轨迹卡出现顺序,与轮次导航条序号一致)
+  let traceCount = 0
 
   const flushBucket = () => {
     const msgs = bucket.filter(shouldRenderMsg)
@@ -790,13 +866,20 @@ const renderItems = computed<RenderItem[]>(() => {
 
     if (isViewingGenerating.value) {
       // 执行中:当前步骤锚定真实末条消息(agentic 新一轮 push 新空气泡,若按「末条有正文」
-      // 找锚点会错挂上一轮,致当前轮打字机/光标/工具卡整条不渲染);先前步骤收进一行实时摘要
+      // 找锚点会错挂上一轮,致当前轮打字机/光标/工具卡整条不渲染);先前步骤收进一行实时摘要。
+      // 摘要统计取整个轮次桶(含当前消息):执行中工具挂在末条消息上(useAiToolEvents 取
+      // state.messages 末条),只统计 prev 拿不到 runningName,完成计数也滞后一轮(黑盒主因)
       const cur = msgs[msgs.length - 1]
       const prev = msgs.slice(0, -1)
       if (prev.length > 0) {
-        items.push({ kind: 'step', key: 'step-' + prev[0].id, stats: collectTurnStats(prev) })
+        pushTimeSepIfNeeded(items, msgs[0].timestamp)
+        traceCount++
+        items.push({ kind: 'step', key: 'step-' + prev[0].id, round: traceCount, stats: collectTurnStats(msgs) })
+      } else {
+        pushTimeSepIfNeeded(items, cur.timestamp)
       }
-      items.push({ kind: 'msg', key: 'm-' + cur.id, msg: cur })
+      items.push({ kind: 'msg', key: 'm-' + cur.id, msg: cur, final: true })
+      lastMsgTs = cur.timestamp
       return
     }
     // 最终答复:末条有正文且非纯 JSON 工具结果的消息;全无正文时保底末条(工具轮可见)
@@ -807,7 +890,7 @@ const renderItems = computed<RenderItem[]>(() => {
     }
     const finalMsg = fi >= 0 ? msgs[fi] : msgs[msgs.length - 1]
     const traceMsgs = msgs.slice(0, msgs.indexOf(finalMsg))
-    // 完成:轨迹折叠为一张卡,展开时再 emit 段内过程消息(与归档分段同一扁平化模式)
+    // 完成:轨迹折叠为一张卡,轮次内容在卡内 rail 面板展开(不再摊平成独立消息项)
     if (traceMsgs.length > 0) {
       const key = 'trace-' + traceMsgs[0].id
       const expanded = expandedTraceIds.value.has(key)
@@ -818,29 +901,34 @@ const renderItems = computed<RenderItem[]>(() => {
           if (tc.completedAt && tc.completedAt > lastCompleted) lastCompleted = tc.completedAt
         }
       }
+      // 轨迹桶不再发 timesep 行:卡头「第 N 轮」+ 绝对起始时刻已承载时间行职责;
+      // 仅推进轨距,保持出口语义(后续消息的间隔判定从本桶起点起算)
+      lastMsgTs = traceMsgs[0].timestamp
+      traceCount++
       items.push({
         kind: 'trace', key,
+        round: traceCount,
         stats: collectTurnStats(traceMsgs),
         startTs: traceMsgs[0].timestamp,
         endTs: Math.max(lastCompleted, finalMsg.timestamp),
+        tokens: sumTurnTokens(traceMsgs),
         traceMsgs, expanded,
       })
-      if (expanded) {
-        for (const m of traceMsgs) {
-          items.push({ kind: 'msg', key: 'tm-' + m.id, msg: m })
-        }
-      }
+    } else {
+      pushTimeSepIfNeeded(items, finalMsg.timestamp)
     }
-    items.push({ kind: 'msg', key: 'm-' + finalMsg.id, msg: finalMsg })
+    items.push({ kind: 'msg', key: 'm-' + finalMsg.id, msg: finalMsg, final: true })
+    lastMsgTs = finalMsg.timestamp
   }
 
   for (const seg of messageSegments.value) {
     if (seg.kind !== 'normal') {
       flushBucket()
-      // 折叠段:总 emit sep;展开时再 emit 段内每条 msg
+      // 折叠段:总 emit sep;展开时再 emit 段内每条 msg(同样按间隔插时间线)
       items.push({ kind: 'sep', key: seg.key, seg })
       if (expandedSegmentIds.value.has(seg.key)) {
         for (const m of seg.msgs) {
+          pushTimeSepIfNeeded(items, m.timestamp)
           items.push({ kind: 'msg', key: 'e-' + seg.key + '-' + m.id, msg: m })
         }
       }
@@ -852,6 +940,7 @@ const renderItems = computed<RenderItem[]>(() => {
       bucket.push(m)
     } else {
       flushBucket()
+      pushTimeSepIfNeeded(items, m.timestamp)
       items.push({ kind: 'msg', key: 'm-' + m.id, msg: m })
     }
   }
@@ -859,6 +948,18 @@ const renderItems = computed<RenderItem[]>(() => {
   return items
 })
 
+// UX 密度改造:轮次导航条(仅多轮长会话 ≥3 张轨迹卡出现,sticky 置顶,只做跳转不做统计)
+const traceNav = computed(() =>
+  renderItems.value.filter((it): it is Extract<RenderItem, { kind: 'trace' }> => it.kind === 'trace')
+)
+
+/** 点击轮次 chip 滚动到对应轨迹卡(block:start 卡头对齐视口顶) */
+function jumpToTrace(key: string): void {
+  messagesContainer.value
+    ?.querySelector(`[data-trace-key="${key}"]`)
+    ?.scrollIntoView({ behavior: 'smooth', block: 'start' })
+}
+
 // 切换对话/新对话时由父取消编辑态;滚动边沿/跟随意图重置在此自管。
 watch(() => store.state.activeConversationId, () => {
   // 切会话重置滚动边沿检测 + 跟随意图(新会话默认跟随底部)
@@ -914,38 +1015,96 @@ defineExpose({
       @go-to-settings="emit('go-to-settings')"
     />
 
+    <!-- 轮次导航条(UX 密度改造:仅多轮长会话 ≥3 张轨迹卡出现,sticky 置顶,只做轮次跳转。
+         调用统计收敛到轨迹卡头部,此处不放数字) -->
+    <div v-if="traceNav.length >= 3" class="ai-trace-nav">
+      <button
+        v-for="tr in traceNav"
+        :key="tr.key"
+        class="ai-trace-nav-chip"
+        :title="$t('ai.trace.roundN', { n: tr.round })"
+        @click="jumpToTrace(tr.key)"
+      >{{ tr.round }}</button>
+    </div>
     <!-- 消息列表(F-15 阶段2:按 renderItems 扁平渲染 — 折叠段 emit 'sep' 项,
          正常消息 + 展开的折叠段内消息 emit 'msg' 项。连续 archived_segment/compressed
          合并一条分隔条,点击展开/收起看原文)
          A 过程压缩:trace 项=完成轮次执行轨迹卡,step 项=执行中实时步骤摘要,均先于 msg 分支拦截。
          UX-2025-19: 每项外层包 .ai-msg-slot(B-260618-01 虚拟滚动已移除,现恒渲染;
-         slot 仅作 flex 子占位 + 消息分组的语义容器,gap 由 .ai-messages 承担)。 -->
+         slot 仅作 flex 子占位 + 消息分组的语义容器,gap 由 .ai-messages 承担)。
+         UX 密度改造:timesep 项=相邻消息间隔 ≥30 分钟或跨天的居中时间分隔线。 -->
     <template v-for="item in renderItems" :key="item.key">
-      <!-- 执行轨迹卡(完成轮次:过程文本+工具卡折叠为一张,默认一行聚合,点开回看;
-           用户手动展开记入 expandedTraceIds 不被自动收回) -->
+      <!-- 执行轨迹卡(完成轮次:过程内容折叠为一张,默认一行聚合,点开在卡内 rail 面板回看
+           每轮思考 pill + 工具卡;头部聚合行含调用/耗时/全程 token 汇总) -->
       <div v-if="item.kind === 'trace'" class="ai-msg-slot">
-        <div class="ai-trace-card" :class="{ 'ai-trace-card--open': item.expanded }">
+        <div class="ai-trace-card" :class="{ 'ai-trace-card--open': item.expanded }" :data-trace-key="item.key">
           <div class="ai-trace-head" @click="toggleTrace(item.key)">
             <span class="ai-trace-chevron" :class="{ 'is-open': item.expanded }">▸</span>
-            <span class="ai-trace-title">{{ $t('ai.trace.title') }}</span>
+            <span class="ai-trace-title">{{ $t('ai.trace.roundN', { n: item.round }) }}</span>
             <span class="ai-trace-agg" :title="traceHoverTitle(item.startTs, item.endTs)">{{ traceAggText(item.stats, item.startTs, item.endTs) }}</span>
+            <span v-if="item.tokens > 0" class="ai-trace-tokens">≈{{ formatTokensK(item.tokens) }} tokens</span>
+            <!-- 绝对起始时刻(mono 小字):轨迹桶已不发独立时间分隔线,时刻职责由卡头承载 -->
+            <span class="ai-trace-tokens">{{ formatAbsolute(item.startTs) }}</span>
             <span class="ai-trace-toggle">{{ item.expanded ? $t('ai.trace.collapse') : $t('ai.trace.expand') }}</span>
           </div>
+          <!-- 展开态 rail 面板:每轮=思考单行 pill(点击展开全文)+工具卡,图标锚定左轨连线贯通 -->
+          <div v-if="item.expanded" class="ai-trace-body">
+            <div v-for="m in item.traceMsgs" :key="m.id" class="ai-trace-round">
+              <button
+                class="ai-think-pill"
+                :title="thinkFullText(m)"
+                @click="toggleThink(m.id)"
+              >
+                <span class="ai-think-ic">
+                  <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M9 18h6"/><path d="M10 22h4"/><path d="M12 2a7 7 0 00-4 12.7c.6.5 1 1.4 1 2.3h6c0-.9.4-1.8 1-2.3A7 7 0 0012 2z"/></svg>
+                </span>
+                <span class="ai-think-text">{{ thinkSnippet(m) }}</span>
+                <span v-if="roundTokenText(m)" class="ai-think-tokens">{{ roundTokenText(m) }}</span>
+              </button>
+              <div
+                v-if="expandedThinkIds.has(m.id) && m.content?.trim()"
+                class="ai-think-full ai-md"
+                v-html="renderMd(m.content)"
+              ></div>
+              <ToolCardList
+                v-if="m.toolCalls && m.toolCalls.length > 0"
+                ref="toolCardListRef"
+                :toolCalls="m.toolCalls"
+                @approve="({ id, approved, decision }) => store.approveToolCall(id, approved, decision)"
+                @batch-approve="(decision) => store.batchApprove(decision)"
+                @install-obscura="onInstallObscura"
+              />
+            </div>
+          </div>
         </div>
       </div>
       <!-- 执行中实时步骤摘要(已完成步骤收进一行,由最近工具事件聚合;仅当前步骤展开) -->
       <div v-else-if="item.kind === 'step'" class="ai-msg-slot">
         <div class="ai-step-line">
           <span class="ai-step-dot"></span>
-          <span class="ai-step-text">{{ stepText(item.stats) }}</span>
+          <span class="ai-step-text">{{ stepText(item.stats, item.round) }}</span>
+        </div>
+      </div>
+      <!-- 居中时间分隔线(UX 密度改造:相邻消息间隔 ≥30 分钟或跨天;当天只 HH:mm,跨天 MM-DD HH:mm) -->
+      <div v-else-if="item.kind === 'timesep'" class="ai-time-sep">
+        <span>{{ formatAbsolute(item.ts) }}</span>
+      </div>
+      <!-- 重试过渡细条(AiStreamRetry 过渡气泡,isRetry 标记):琥珀点+单行中性文案,
+           不走 avatar/错误红卡/操作条;重试耗尽的终态错误(AiError,无 isRetry)仍走红卡 -->
+      <div v-else-if="item.kind === 'msg' && item.msg.isRetry" class="ai-msg-slot">
+        <div class="ai-retry-line">
+          <span class="ai-retry-dot"></span>
+          <span class="ai-retry-text">{{ item.msg.content }}</span>
         </div>
       </div>
       <!-- B-260618-19: 纯空 assistant(无 content/error/toolCalls 且非末条流式)整 slot 不渲染,
            消除空 div + flex gap 堆积的大片空白;sep 始终渲染;有 toolCalls 的空 assistant
-           仍渲染(工具卡可见——修复 agentic 工具轮 LLM 无文本时工具卡消失)。 -->
+           仍渲染(工具卡可见——修复 agentic 工具轮 LLM 无文本时工具卡消失)。
+           UX 密度改造:per-block 相对时间已移除,精确时刻上移到消息容器 title(hover 可查)。 -->
       <div
         v-else-if="item.kind === 'sep' ? true : shouldRenderMsg(item.msg)"
         class="ai-msg-slot"
+        :title="item.kind === 'msg' ? formatDate(item.msg.timestamp) : undefined"
       >
       <!-- 折叠分隔条(归档段)— 轻量,始终渲染 -->
       <div
@@ -1015,7 +1174,7 @@ defineExpose({
           <div
             v-else-if="(item.msg.content && item.msg.content.trim()) || (isLastAi(item.msg) && store.state.streaming && streamingBlocks.length > 0)"
             class="ai-msg-bubble ai-msg-bubble--ai ai-md"
-            :class="{ 'ai-msg-bubble--error': item.msg.isError, 'ai-msg-bubble--collapsed': shouldCollapseLong(item.msg) }"
+            :class="{ 'ai-msg-bubble--error': item.msg.isError, 'ai-msg-bubble--collapsed': shouldCollapseLong(item.msg), 'ai-msg-bubble--answer': item.final === true && !item.msg.isError }"
             :key="'md-' + item.msg.id + '-' + (isLastAi(item.msg) ? _mdRenderKey : 0)"
           >
             <!-- 流式:分块渲染(已完成块key稳定→DOM不重建)。
@@ -1094,14 +1253,14 @@ defineExpose({
               :aria-expanded="tokenPopoverMsgId === item.msg.id"
               @click="toggleTokenPopover(item.msg, $event)"
             >
-              <span>{{ formatTokens(tokenInOf(item.msg)) }} in<template v-if="tokenEstimated(item.msg)"><span class="ai-token-est">({{ $t('aiChat.estimated') }})</span></template></span>
+              <span>{{ formatTokensK(tokenInOf(item.msg)) }} in<template v-if="tokenEstimated(item.msg)"><span class="ai-token-est">({{ $t('aiChat.estimated') }})</span></template></span>
               <span class="ai-token-sep">·</span>
-              <span>{{ formatTokens(tokenCacheOf(item.msg)) }} cache</span>
+              <span>{{ formatTokensK(tokenCacheOf(item.msg)) }} cache</span>
               <span class="ai-token-sep">·</span>
-              <span>{{ formatTokens(tokenOutOf(item.msg)) }} out</span>
+              <span>{{ formatTokensK(tokenOutOf(item.msg)) }} out</span>
               <template v-if="tokenReasonOf(item.msg) > 0">
                 <span class="ai-token-sep">·</span>
-                <span>{{ formatTokens(tokenReasonOf(item.msg)) }} reason</span>
+                <span>{{ formatTokensK(tokenReasonOf(item.msg)) }} reason</span>
               </template>
             </button>
             <!-- 详情面板(absolute/right 0/popout 样式,复用 TopBar 风格):完整 usage + 流程 -->
@@ -1113,19 +1272,19 @@ defineExpose({
               <div class="ai-token-popover-title">{{ $t('aiChat.tokenDetailTitle') }}<template v-if="tokenEstimated(item.msg)"><span class="ai-token-est">({{ $t('aiChat.estimated') }})</span></template></div>
               <div class="ai-token-popover-row">
                 <span class="ai-token-popover-label">{{ $t('aiChat.tokenInLabel') }}</span>
-                <span class="ai-token-popover-val">{{ formatTokens(tokenInOf(item.msg)) }} ({{ tokenInOf(item.msg) }})</span>
+                <span class="ai-token-popover-val">{{ formatTokensK(tokenInOf(item.msg)) }} ({{ tokenInOf(item.msg) }})</span>
               </div>
               <div class="ai-token-popover-row">
                 <span class="ai-token-popover-label">{{ $t('aiChat.tokenCacheLabel') }}</span>
-                <span class="ai-token-popover-val">{{ formatTokens(tokenCacheOf(item.msg)) }} ({{ tokenCacheOf(item.msg) }})</span>
+                <span class="ai-token-popover-val">{{ formatTokensK(tokenCacheOf(item.msg)) }} ({{ tokenCacheOf(item.msg) }})</span>
               </div>
               <div class="ai-token-popover-row">
                 <span class="ai-token-popover-label">{{ $t('aiChat.tokenOutLabel') }}</span>
-                <span class="ai-token-popover-val">{{ formatTokens(tokenOutOf(item.msg)) }} ({{ tokenOutOf(item.msg) }})</span>
+                <span class="ai-token-popover-val">{{ formatTokensK(tokenOutOf(item.msg)) }} ({{ tokenOutOf(item.msg) }})</span>
               </div>
               <div v-if="tokenReasonOf(item.msg) > 0" class="ai-token-popover-row">
                 <span class="ai-token-popover-label">{{ $t('aiChat.tokenReasonLabel') }}</span>
-                <span class="ai-token-popover-val">{{ formatTokens(tokenReasonOf(item.msg)) }} ({{ tokenReasonOf(item.msg) }})</span>
+                <span class="ai-token-popover-val">{{ formatTokensK(tokenReasonOf(item.msg)) }} ({{ tokenReasonOf(item.msg) }})</span>
               </div>
               <div v-if="cacheHitRate(item.msg) != null" class="ai-token-popover-row">
                 <span class="ai-token-popover-label">{{ $t('aiChat.tokenCacheRateLabel') }}</span>
@@ -1153,13 +1312,6 @@ defineExpose({
             @batch-approve="(decision) => store.batchApprove(decision)"
             @install-obscura="onInstallObscura"
           />
-
-          <!-- UX-2025-13:消息时间戳(相对时间+hover绝对时间),流式生成中不显示避免抖动 -->
-          <span
-            v-if="!(isLastAi(item.msg) && store.state.streaming)"
-            class="ai-msg-time"
-            :title="formatDate(item.msg.timestamp)"
-          >{{ formatRelative(item.msg.timestamp) }}</span>
         </div>
       </div>
       </div>
@@ -1395,19 +1547,64 @@ defineExpose({
 .ai-msg-chip--idea    { background: rgba(255, 255, 255, 0.22); border: 1px solid rgba(255, 255, 255, 0.35); }
 .ai-msg-chip--skill   { background: rgba(0, 0, 0, 0.18); }
 
-/* ── 消息时间戳── */
-.ai-msg-time {
+/* ── UX 密度改造:居中时间分隔线(相邻消息间隔 ≥30 分钟或跨天;
+     per-block 相对时间漂移无价值已移除,精确时刻在消息容器 title) ── */
+.ai-time-sep {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin: 2px 0;
+  font-family: var(--df-font-mono);
+  font-size: 10px;
+  color: var(--df-text-dim);
+  user-select: none;
+  white-space: nowrap;
+}
+.ai-time-sep::before,
+.ai-time-sep::after {
+  content: '';
+  flex: 1;
+  height: 1px;
+  background: color-mix(in srgb, var(--df-text-dim) 22%, transparent);
+}
+
+/* ── 最终回答卡:左 2px 品牌色强调边条 + 背景微抬升(与轨迹内思考 pill 明确分层) ── */
+.ai-msg-bubble--answer {
+  border-left: 2px solid var(--df-accent);
+  background: color-mix(in srgb, var(--df-accent) 4%, var(--df-bg-card));
+}
+
+/* ── 轮次导航条(仅多轮长会话 ≥3 张轨迹卡出现,sticky 置顶,只做跳转) ── */
+.ai-trace-nav {
+  position: sticky;
+  top: 0;
+  z-index: 6;
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  margin: -6px -2px 0;
+  padding: 5px 6px;
+  background: color-mix(in srgb, var(--df-bg) 86%, transparent);
+  backdrop-filter: blur(6px);
+  border-bottom: 0.5px solid color-mix(in srgb, var(--df-border) 70%, transparent);
+}
+.ai-trace-nav-chip {
+  min-width: 20px;
+  height: 18px;
+  padding: 0 5px;
+  border: 0.5px solid var(--df-border);
+  border-radius: var(--df-radius-sm);
+  background: var(--df-bg-card);
+  color: var(--df-text-dim);
+  font-family: var(--df-font-mono);
   font-size: 10px;
   line-height: 1;
-  color: var(--df-text-dim);
-  margin-top: 2px;
-  align-self: flex-start; /* AI 消息:靠气泡左对齐 */
-  flex-shrink: 0;
-  cursor: default;
-  user-select: none;
+  cursor: pointer;
+  transition: color 0.15s var(--df-ease), border-color 0.15s var(--df-ease);
 }
-.ai-msg-time--user {
-  align-self: flex-end; /* 用户消息:靠气泡右对齐 */
+.ai-trace-nav-chip:hover {
+  color: var(--df-accent);
+  border-color: var(--df-accent);
 }
 
 /* ── 消息气泡拷贝按钮── */
@@ -1709,6 +1906,105 @@ defineExpose({
   color: var(--df-text-dim);
 }
 .ai-trace-toggle { flex-shrink: 0; font-size: 10px; color: var(--df-accent); opacity: 0.85; }
+/* 全程 token 汇总(轨迹卡头部一处,per-round 明细下沉思考 pill 行) */
+.ai-trace-tokens {
+  flex-shrink: 0;
+  font-family: var(--df-font-mono);
+  font-size: 10px;
+  color: var(--df-text-dim);
+}
+
+/* ── 轨迹展开态 rail 面板:左轨竖线贯通,思考 pill 与工具卡图标锚定其上(git-graph 式轮次结构)。
+     轨 x=22px 对齐工具卡图标中心(卡内 padding 10px + 24px 图标位一半),pill 灯泡图标同 x。 ── */
+.ai-trace-body {
+  position: relative;
+  padding: 2px 10px 8px 0;
+}
+.ai-trace-body::before {
+  content: '';
+  position: absolute;
+  left: 22px;
+  top: 0;
+  bottom: 0;
+  width: 1px;
+  background: color-mix(in srgb, var(--df-text-dim) 22%, transparent);
+}
+.ai-trace-round {
+  position: relative;
+  padding: 2px 0;
+}
+.ai-trace-round + .ai-trace-round { margin-top: 2px; }
+
+/* ── 思考单行 pill:灯泡锚轨 + 单行截断 + 右端 token 小字(空间不足先吃 token 尾段) ── */
+.ai-think-pill {
+  position: relative;
+  display: flex;
+  align-items: center;
+  gap: 7px;
+  width: 100%;
+  min-height: 24px;
+  padding: 3px 8px 3px 38px;
+  border: none;
+  border-radius: var(--df-radius-sm);
+  background: transparent;
+  color: var(--df-text-secondary);
+  font-size: 11px;
+  line-height: 1.5;
+  text-align: left;
+  cursor: pointer;
+  user-select: none;
+  transition: background 0.15s var(--df-ease);
+}
+.ai-think-pill:hover {
+  background: color-mix(in srgb, var(--df-text-dim) 8%, transparent);
+}
+.ai-think-ic {
+  position: absolute;
+  left: 10px;
+  top: 50%;
+  transform: translateY(-50%);
+  width: 24px;
+  height: 24px;
+  border-radius: var(--df-radius-sm);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: var(--df-accent-bg);
+  color: var(--df-accent);
+  flex-shrink: 0;
+}
+.ai-think-text {
+  flex: 1 1 auto;
+  min-width: 80px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.ai-think-tokens {
+  flex: 0 1 auto;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  font-family: var(--df-font-mono);
+  font-size: 9.5px;
+  color: var(--df-text-dim);
+  opacity: 0.75;
+  margin-left: auto;
+}
+/* 展开的完整思考段落:保持既有卡片样式(气泡卡同底),挂在 pill 下方缩进对齐正文 */
+.ai-think-full {
+  margin: 2px 0 6px 38px;
+  padding: 8px 12px;
+  background: var(--df-bg-card);
+  border: 0.5px solid var(--df-border);
+  border-radius: var(--df-radius);
+  font-size: 12px;
+  line-height: 1.6;
+  color: var(--df-text-secondary);
+  max-height: 320px;
+  overflow-y: auto;
+}
 
 /* 执行中实时步骤摘要(已完成步骤收进一行,accent 呼吸点对齐状态栏 .ai-agentic-progress) */
 .ai-step-line {
@@ -1742,4 +2038,34 @@ defineExpose({
   0%, 100% { opacity: 1; }
   50% { opacity: 0.3; }
 }
+
+/* 重试过渡细条(isRetry 过渡气泡):琥珀点呼吸+单行中性文案,骨架对齐 .ai-step-line。
+   warning 色调与错误红卡分层:重试是过渡态非终态失败,终态仍走 .ai-msg-bubble--error */
+.ai-retry-line {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  max-width: var(--df-msg-max-width);
+  padding: 4px 10px;
+  border-radius: var(--df-radius);
+  background: color-mix(in srgb, var(--df-warning, #f0c75e) 8%, transparent);
+  font-size: 11px;
+  color: var(--df-text-secondary);
+  user-select: none;
+}
+.ai-retry-dot {
+  width: 5px;
+  height: 5px;
+  border-radius: 50%;
+  background: var(--df-warning, #f0c75e);
+  flex-shrink: 0;
+  animation: ai-step-pulse 1.2s ease-in-out infinite;
+}
+.ai-retry-text {
+  font-family: var(--df-font-mono);
+  font-size: 10.5px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
 </style>