diff --git a/src/components/ai/TopBar.vue b/src/components/ai/TopBar.vue
index ad9cadd..16b2389 100644
--- a/src/components/ai/TopBar.vue
+++ b/src/components/ai/TopBar.vue
@@ -20,19 +20,34 @@
         ⏳ {{ $t('aiChat.pendingApprovalCount', { n: pendingApprovalCount }) }}
       </div>
     </div>
-    <!-- 模型选择器(对话透明化 L1:折叠为紧凑下拉) -->
-    <div class="ai-model-picker" :title="$t('aiChat.specifyModeHint') || ''">
-      <select
-        v-if="enabledModels.length"
-        class="ai-model-select ai-model-select--compact"
-        :value="selectedModelId"
-        @change="onModelSelect($event)"
+    <!-- 提供商状态 + 模型选择器 -->
+    <div class="ai-header-center">
+      <div
+        class="ai-provider-bar"
+        :class="{ 'ai-provider-bar--switchable': store.state.providers.length > 1 }"
+        v-if="store.state.providers.length > 0"
+        :title="store.state.providers.length > 1 ? $t('aiChat.clickToSwitchProvider') : ''"
+        @click="cycleProvider"
       >
-        <option v-for="m in enabledModels" :key="m.model_id" :value="m.model_id">
-          {{ modelOptionLabel(m) }}
-        </option>
-      </select>
-      <span v-else class="ai-model-empty">{{ $t('aiChat.noModels') }}</span>
+        <span class="provider-dot"></span>
+        <span class="provider-name">{{ activeProviderName }}</span>
+      </div>
+      <div class="ai-provider-bar ai-provider-empty" v-else>
+        <span class="provider-hint">{{ $t('aiChat.providerNotConfigured') }}</span>
+      </div>
+      <div class="ai-model-picker" :title="$t('aiChat.specifyModeHint') || ''">
+        <select
+          v-if="enabledModels.length"
+          class="ai-model-select ai-model-select--compact"
+          :value="selectedModelId"
+          @change="onModelSelect($event)"
+        >
+          <option v-for="m in enabledModels" :key="m.model_id" :value="m.model_id">
+            {{ modelOptionLabel(m) }}
+          </option>
+        </select>
+        <span v-else class="ai-model-empty">{{ $t('aiChat.noModels') }}</span>
+      </div>
     </div>
     <div class="ai-header-actions">
       <button class="ai-btn-icon" @click="emit('new-conversation')" :title="$t('aiChat.newConversation')">
@@ -92,36 +107,51 @@
     </div>
   </div>
 
-  <!-- 下半栏:provider + goals 并排 -->
-  <div class="ai-bottom-bar">
-    <!-- 提供商状态 -->
-    <div
-      class="ai-provider-bar"
-      :class="{ 'ai-provider-bar--switchable': store.state.providers.length > 1 }"
-      v-if="store.state.providers.length > 0"
-      :title="store.state.providers.length > 1 ? $t('aiChat.clickToSwitchProvider') : ''"
-      @click="cycleProvider"
-    >
-      <span class="provider-dot"></span>
-      <span class="provider-name">{{ activeProviderName }}</span>
-    </div>
-    <div class="ai-provider-bar ai-provider-empty" v-else>
-      <span class="provider-hint">{{ $t('aiChat.providerNotConfigured') }}</span>
-    </div>
-
-    <!-- 目标入口(扁平化,不抢眼) -->
+  <!-- 底部工具区:标题 + 目标 + 历史消息 + 上下文摘要 -->
+  <div class="ai-bottom-tools" ref="goalsRef">
+    <span v-if="currentConvTitle" class="ai-bottom-title">{{ currentConvTitle }}</span>
+    <div class="ai-bottom-tools-right">
+    <!-- 目标计数 -->
     <div v-if="goals.length" class="ai-goals-inline">
-      <span class="ai-goals-inline-badge" @click="goalsExpanded = !goalsExpanded">
-        <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="10"/><circle cx="12" cy="12" r="6"/><circle cx="12" cy="12" r="2"/></svg>
+      <span class="ai-goals-inline-badge ai-tool-badge" @click="goalsExpanded = !goalsExpanded" title="查看目标">
+        <svg width="9" height="9" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="10"/><circle cx="12" cy="12" r="6"/><circle cx="12" cy="12" r="2"/></svg>
         {{ goals.length }}
       </span>
       <div v-if="goalsExpanded" class="ai-goals-inline-list">
         <div v-for="(g, i) in goals" :key="i" class="ai-goal-inline-item">
-          <span>{{ g }}</span>
-          <button class="ai-goal-remove" @click="removeGoal(i)">×</button>
+          <span class="ai-goal-text">{{ g }}</span>
+          <button class="ai-goal-remove" @click.stop="removeGoal(i)">×</button>
         </div>
       </div>
     </div>
+    <!-- 历史消息 -->
+    <div v-if="historyMsgs.length" class="ai-history-inline">
+      <span class="ai-history-inline-badge ai-tool-badge" @click="historyExpanded = !historyExpanded" title="查看历史消息">
+        <svg width="9" height="9" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"/></svg>
+        {{ historyMsgs.length }}
+      </span>
+      <div v-if="historyExpanded" class="ai-history-inline-list">
+        <div v-for="h in historyMsgs" :key="h.id" class="ai-history-inline-item" @click="scrollToMessage(h.id)">
+          <span class="ai-history-index">{{ h.num }}</span>
+          <span class="ai-history-text">{{ h.text }}</span>
+          <span class="ai-history-time">{{ h.time }}</span>
+        </div>
+      </div>
+    </div>
+    <!-- 上下文摘要 -->
+    <div v-if="summaryMsgs.length" class="ai-summary-inline">
+      <span class="ai-summary-inline-badge ai-tool-badge" @click="summaryExpanded = !summaryExpanded" title="查看上下文摘要">
+        <svg width="9" height="9" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M4 6h16M4 12h16M4 18h12"/></svg>
+        {{ summaryMsgs.length }}
+      </span>
+      <div v-if="summaryExpanded" class="ai-summary-inline-list">
+        <div v-for="(s, i) in summaryMsgs" :key="i" class="ai-summary-inline-item" @click="scrollToMessage(s.id)">
+          <span class="ai-summary-label">{{ $t('aiChat.compressedSummaryLabel') || '上下文摘要' }} #{{ summaryMsgs.length - i }}</span>
+          <p class="ai-summary-preview">{{ s.text }}</p>
+        </div>
+      </div>
+    </div>
+    </div>
   </div>
 
   <!-- UX-2025-14: Provider 切换临时 bar(切换后展示当前 model 名,2s 后淡出) -->
@@ -137,11 +167,11 @@
 // 第三批抽离: 顶部工具栏 TopBar(从 AiChat.vue 行 12-145 template + 行 741-902 script 迁移)
 // 零行为变更。provider/model 选择逻辑直接读 store(单例共享),动作按钮 emit 回父,
 // 父持有 clear/compress/confirm 逻辑 + 单一 toast 源(provider-switched 回父弹 toast)。
-import { ref, computed, watch, onBeforeUnmount } from 'vue'
+import { ref, computed, watch, onMounted, onBeforeUnmount } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useAiStore } from '../../stores/ai'
 import { aiApi } from '../../api/ai'
-import type { ModelConfig } from '../../api/types'
+import type { AiMessage, ModelConfig } from '../../api/types'
 
 defineProps<{
   /** 分离窗口模式(嵌入 vs 分离决定顶部按钮组) */
@@ -222,21 +252,114 @@ watch(() => store.state.activeConversationId, () => {
   store.modelOverride.value = enabledModels.value[0]?.model_id || null
 })
 
+// ── 当前对话标题 ──
+const currentConvTitle = computed(() => {
+  const id = store.state.activeConversationId
+  if (!id) return ''
+  const conv = store.state.conversations.find(c => c.id === id)
+  return conv?.title || ''
+})
+
 // ── 🎯 对话目标面板(对话透明化 L1:Goal visibility) ──
-// 从最新 switch 返回的 conversation summary 中取 pinned_goals,
-// 增删操作经后端 IPC 持久化到 DB 并同步 per_conv 内存。
 const goals = ref<string[]>([])
-/** 目标列表展开/折叠 */
 const goalsExpanded = ref(false)
 
-/** 监听 activeConversationId 变化,加载目标的精简实现:从 store.conversations 查找当前会话的目标。 */
+// ── 📋 历史消息(当前会话 user 消息列表) ──
+interface HistoryItem { id: string; text: string; time: string; num: number }
+/** 时间显示:今日 HH:mm / 昨天 HH:mm / MM-DD HH:mm */
+function fmtTime(ts: number): string {
+  const d = new Date(ts)
+  const now = new Date()
+  const pad = (n: number) => String(n).padStart(2, '0')
+  const hm = `${pad(d.getHours())}:${pad(d.getMinutes())}`
+  // 同一天 → 只显示时间
+  if (d.getFullYear() === now.getFullYear() && d.getMonth() === now.getMonth() && d.getDate() === now.getDate()) {
+    return hm
+  }
+  // 昨天
+  const yest = new Date(now)
+  yest.setDate(yest.getDate() - 1)
+  if (d.getFullYear() === yest.getFullYear() && d.getMonth() === yest.getMonth() && d.getDate() === yest.getDate()) {
+    return `昨天 ${hm}`
+  }
+  // 更早
+  return `${pad(d.getMonth()+1)}-${pad(d.getDate())} ${hm}`
+}
+const MAX_HISTORY = 20
+const MAX_CHARS = 80
+const historyMsgs = computed<HistoryItem[]>(() => {
+  const allUserMsgs = store.state.messages
+    .filter((m): m is AiMessage & { timestamp: number } => m.role === 'user' && !!m.content && !!m.timestamp)
+    .map((m, idx) => ({
+      id: m.id,
+      text: m.content.length > MAX_CHARS ? m.content.slice(0, MAX_CHARS) + '…' : m.content,
+      time: fmtTime(m.timestamp),
+      num: idx + 1,
+    }))
+  return allUserMsgs.slice(-MAX_HISTORY).reverse()
+})
+const historyExpanded = ref(false)
+
+/** 点击历史消息项 → 滚动定位到对应的消息气泡 */
+function scrollToMessage(msgId: string) {
+  historyExpanded.value = false
+  // 消息列表已有 data-msg-id 属性,直接 DOM 查询定位
+  const el = document.querySelector(`[data-msg-id="${msgId}"]`)
+  if (el) {
+    el.scrollIntoView({ behavior: 'smooth', block: 'center' })
+  }
+}
+
+/** 目标/历史下拉容器 DOM 引用（用于点击外部检测） */
+const goalsRef = ref<HTMLElement | null>(null)
+
+function onBottomToolsClickOutside(e: MouseEvent) {
+  if (!goalsRef.value) return
+  if (goalsExpanded.value && !goalsRef.value.contains(e.target as Node)) {
+    goalsExpanded.value = false
+  }
+  if (historyExpanded.value && !goalsRef.value.contains(e.target as Node)) {
+    historyExpanded.value = false
+  }
+  if (summaryExpanded.value && !goalsRef.value.contains(e.target as Node)) {
+    summaryExpanded.value = false
+  }
+}
+// ── 📄 上下文摘要(压缩/归档的系统消息) ──
+interface SummaryItem { id: string; text: string }
+const summaryMsgs = computed<SummaryItem[]>(() => {
+  return store.state.messages
+    .filter(m => m.role === 'system' && !!m.content)
+    .map(m => ({
+      id: m.id,
+      text: m.content.length > 120 ? m.content.slice(0, 120) + '…' : m.content,
+    }))
+})
+const summaryExpanded = ref(false)
+
+/** 按 Escape 关闭所有下拉 */
+function onBottomToolsKeydown(e: KeyboardEvent) {
+  if (e.key === 'Escape') {
+    goalsExpanded.value = false
+    historyExpanded.value = false
+    summaryExpanded.value = false
+  }
+}
+onMounted(() => {
+  document.addEventListener('click', onBottomToolsClickOutside)
+  document.addEventListener('keydown', onBottomToolsKeydown)
+})
+onBeforeUnmount(() => {
+  document.removeEventListener('click', onBottomToolsClickOutside)
+  document.removeEventListener('keydown', onBottomToolsKeydown)
+})
+
 /** 监听 activeConversationId 变化,加载目标 */
 watch(() => store.state.activeConversationId, (convId) => {
   loadGoals(convId)
 }, { immediate: true })
-/** 消息变化后也刷新目标(发消息→save_conversation→DB→store 需重读) */
+/** 消息变化后也刷新目标 */
 watch(() => store.state.messages.length, () => {
-  // loadConversations 异步,等 store 刷新后重读
   setTimeout(() => loadGoals(store.state.activeConversationId), 100)
 })
 
@@ -246,13 +369,14 @@ function loadGoals(convId: string | null) {
   goals.value = conv?.pinned_goals ?? []
 }
 
-/** 移除第 i 个目标:删除后持久化全量列表到后端。 */
+/** 移除第 i 个目标（移除最后一个自动收起） */
 async function removeGoal(i: number) {
   const convId = store.state.activeConversationId
   if (!convId) return
   const next = [...goals.value]
   next.splice(i, 1)
   goals.value = next
+  if (next.length === 0) goalsExpanded.value = false
   await aiApi.updateConversationGoals(convId, next)
 }
 
@@ -317,6 +441,10 @@ onBeforeUnmount(() => {
   font-size: 13px;
   font-weight: 500;
   color: var(--df-text);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  max-width: 200px;
 }
 /* AE-2025-02:审批徽标(待审批>0 时显于头部,点击跳首个审批卡) */
 .ai-approval-badge {
@@ -340,9 +468,6 @@ onBeforeUnmount(() => {
 .ai-model-picker {
   display: flex;
   align-items: center;
-  margin-left: auto;
-  margin-right: 4px;
-  padding-left: 8px;
   min-width: 0;
 }
 .ai-model-select {
@@ -360,8 +485,6 @@ onBeforeUnmount(() => {
 }
 .ai-model-select--compact {
   max-width: 130px;
-  margin-left: auto;
-  margin-right: 4px;
 }
 .ai-model-select:disabled {
   opacity: 0.6;
@@ -411,76 +534,27 @@ onBeforeUnmount(() => {
 .ai-btn-spinner {
   animation: ai-btn-spin 0.9s linear infinite;
 }
-
-/* ═══ 🎯 对话目标面板(对话透明化 L1) ═══ */
-.ai-goals-panel {
-  padding: 6px 14px;
-  border-bottom: 0.5px solid var(--df-border);
-  background: color-mix(in srgb, var(--df-accent) 6%, transparent);
-}
-.ai-goals-header {
+/* 底部工具区(标题左 + 工具右) */
+.ai-bottom-tools {
   display: flex;
   align-items: center;
-  gap: 6px;
-  margin-bottom: 4px;
+  justify-content: space-between;
+  padding: 0 14px 4px;
 }
-.ai-goals-title {
+.ai-bottom-title {
   font-size: 11px;
-  font-weight: 500;
-  color: var(--df-accent);
+  color: var(--df-text-secondary);
+  min-width: 0;
+  flex: 1;
+  margin-right: 8px;
 }
-.ai-goals-list {
-  display: flex;
-  flex-direction: column;
-  gap: 2px;
-}
-.ai-goal-item {
+.ai-bottom-tools-right {
   display: flex;
   align-items: center;
   gap: 4px;
-  padding: 1px 0;
-}
-.ai-goal-icon {
-  font-size: 10px;
   flex-shrink: 0;
 }
-.ai-goal-text {
-  font-size: 11px;
-  color: var(--df-text-secondary);
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-  flex: 1;
-  min-width: 0;
-}
-.ai-goal-remove {
-  border: none;
-  background: transparent;
-  color: var(--df-text-dim);
-  cursor: pointer;
-  font-size: 13px;
-  padding: 0 2px;
-  line-height: 1;
-  flex-shrink: 0;
-  opacity: 0;
-  transition: opacity 0.15s;
-}
-.ai-goal-item:hover .ai-goal-remove {
-  opacity: 1;
-}
-.ai-goal-remove:hover {
-  color: var(--df-danger);
-}
-
-/* ═══ Provider Bar + Goals(并排) ═══ */
-.ai-bottom-bar {
-  display: flex;
-  align-items: center;
-  gap: 8px;
-  padding: 2px 14px;
-  border-bottom: 0.5px solid var(--df-border);
-  min-height: 26px;
-}
+/* ═══ Provider Bar (header 中间区) ═══ */
 .ai-provider-bar {
   display: inline-flex;
   align-items: center;
@@ -510,33 +584,152 @@ onBeforeUnmount(() => {
   background: var(--df-danger-bg);
 }
 
-/* 目标入口(扁平低调) */
+/* 历史消息(底部) */
+.ai-history-inline {
+  position: relative;
+  display: inline-flex;
+  align-items: center;
+}
+/* 底部工具通用徽标 */
+.ai-tool-badge {
+  cursor: pointer;
+  font-size: 11px;
+  padding: 2px 8px;
+  border-radius: 4px;
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  color: var(--df-text);
+  background: var(--df-bg-card);
+  border: 0.5px solid var(--df-border);
+  transition: color 0.15s, background 0.15s;
+  white-space: nowrap;
+}
+.ai-tool-badge:hover {
+  background: var(--df-bg-card-hover);
+}
+
+/* 目标计数(底部) */
 .ai-goals-inline {
   position: relative;
   display: inline-flex;
   align-items: center;
 }
-.ai-goals-inline-badge {
+.ai-history-inline-list {
+  position: absolute;
+  left: auto; right: 0;
+  top: 100%;
+  z-index: 100;
+  min-width: 240px;
+  max-width: 400px;
+  max-height: 300px;
+  overflow-y: auto;
+  background: var(--df-bg);
+  border: 0.5px solid var(--df-border);
+  border-radius: var(--df-radius-sm);
+  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
+  padding: 4px 0;
+  margin-top: 2px;
+}
+.ai-history-inline-item {
+  display: flex;
+  align-items: flex-start;
+  gap: 6px;
+  padding: 4px 8px;
+  font-size: 11px;
   cursor: pointer;
+  color: var(--df-text-secondary);
+  transition: background 0.1s;
+}
+.ai-history-inline-item:hover {
+  background: var(--df-bg-card);
+  color: var(--df-text);
+}
+.ai-history-index {
+  flex-shrink: 0;
   font-size: 10px;
-  padding: 1px 5px;
-  border-radius: 3px;
+  color: var(--df-text-dim);
+  min-width: 24px;
+  text-align: right;
+  font-family: var(--df-font-mono);
+}
+.ai-history-text {
+  flex: 1;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  line-height: 1.4;
+}
+.ai-history-time {
+  flex-shrink: 0;
+  font-size: 10px;
+  color: var(--df-text-dim);
+  font-family: var(--df-font-mono);
+}
+
+/* ═══ 上下文摘要(底部) ═══ */
+.ai-summary-inline {
+  position: relative;
   display: inline-flex;
   align-items: center;
-  gap: 2px;
-  color: var(--df-text-dim);
-  background: transparent;
-  transition: color 0.15s, background 0.15s;
-  opacity: 0.6;
 }
-.ai-goals-inline-badge:hover {
-  opacity: 1;
+.ai-summary-inline-list {
+  position: absolute;
+  left: auto; right: 0;
+  top: 100%;
+  z-index: 100;
+  min-width: 280px;
+  max-width: 420px;
+  max-height: 360px;
+  overflow-y: auto;
+  background: var(--df-bg);
+  border: 0.5px solid var(--df-border);
+  border-radius: var(--df-radius-sm);
+  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
+  padding: 6px 0;
+  margin-top: 2px;
+}
+.ai-summary-inline-item {
+  padding: 6px 10px;
+  cursor: pointer;
+  border-bottom: 0.5px solid var(--df-border);
+  transition: background 0.1s;
+}
+.ai-summary-inline-item:last-child { border-bottom: none; }
+.ai-summary-inline-item:hover {
   background: var(--df-bg-card);
+}
+.ai-summary-label {
+  display: block;
+  font-size: 10px;
+  font-weight: 600;
+  color: var(--df-accent);
+  margin-bottom: 2px;
+}
+.ai-summary-preview {
+  margin: 0;
+  font-size: 11px;
   color: var(--df-text-secondary);
+  line-height: 1.5;
+  display: -webkit-box;
+  -webkit-line-clamp: 3;
+  -webkit-box-orient: vertical;
+  overflow: hidden;
+}
+
+/* header 中间区:provider + 模型选择器并排 */
+.ai-header-center {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  flex: 1;
+  justify-content: center;
+  min-width: 0;
 }
 .ai-goals-inline-list {
   position: absolute;
-  top: 100%; left: 0;
+  left: auto; right: 0;
   z-index: 100;
   min-width: 200px;
   max-width: 360px;
@@ -550,13 +743,21 @@ onBeforeUnmount(() => {
 .ai-goal-inline-item {
   display: flex;
   align-items: center;
-  justify-content: space-between;
-  gap: 8px;
-  padding: 3px 8px;
+  gap: 4px;
+  padding: 3px 6px;
   font-size: 11px;
+  cursor: pointer;
+  border-radius: 2px;
 }
 .ai-goal-inline-item:hover {
-  background: var(--df-bg-card, #f5f5f5);
+  background: var(--df-bg-card);
+}
+.ai-goal-text {
+  flex: 1;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
 }
 .ai-goal-remove:hover {
   color: var(--df-danger, #e5484d);