diff --git a/src/components/AIChat/ChatExplorer.vue b/src/components/AIChat/ChatExplorer.vue
index f11720af..d16ff170 100644
--- a/src/components/AIChat/ChatExplorer.vue
+++ b/src/components/AIChat/ChatExplorer.vue
@@ -50,7 +50,6 @@ const {
   isAIThinking,
   currentAIChatId,
   currentToolStatus,
-  toolsUsedInCurrentRound,
   sessionTokenUsage,
   agentStatus,
   selectedAssistantId,
@@ -517,6 +516,7 @@ watch(
                     :is-streaming="pair.assistant.isStreaming"
                     :content-blocks="pair.assistant.contentBlocks"
                     :show-capture-button="!pair.assistant.isStreaming"
+                    :active-tool="pair.assistant.isStreaming ? currentToolStatus : null"
                     @fork="handleForkAIChat"
                   />
                 </div>
@@ -530,7 +530,6 @@ watch(
                   !(messages[messages.length - 1]?.contentBlocks?.length ?? 0)
                 "
                 :current-tool-status="currentToolStatus"
-                :tools-used="toolsUsedInCurrentRound"
                 :agent-status="agentStatus"
               />
             </div>
@@ -550,7 +549,7 @@ watch(
 
           <!-- 预设问题气泡（仅在对话为空时显示） -->
           <div v-if="messages.length === 0 && !isAIThinking" class="px-4 pb-2">
-            <div class="mx-auto max-w-[740px]">
+            <div class="mx-auto max-w-3xl">
               <PresetQuestions
                 :questions="currentPresetQuestions"
                 :leading-action-label="t('ai.chat.input.useSkill')"
@@ -563,10 +562,9 @@ watch(
 
           <!-- 输入框区域 -->
           <div class="px-4 pb-2">
-            <div class="mx-auto max-w-[740px]">
+            <div class="mx-auto max-w-3xl">
               <div
                 class="overflow-visible rounded-2xl bg-white shadow-[0_2px_14px_rgba(0,0,0,0.04)] ring-1 ring-gray-200/60 transition-all focus-within:ring-primary-500/40 focus-within:shadow-[0_4px_20px_rgba(0,0,0,0.08)] dark:bg-page-dark dark:ring-white/5 dark:focus-within:ring-primary-500/40"
-                :class="[isAIThinking ? 'bg-gray-50/50 dark:bg-page-dark/50' : '']"
               >
                 <AIChatInput
                   ref="chatInputRef"
@@ -582,7 +580,7 @@ watch(
                 />
 
                 <ChatStatusBar
-                  class="border-t border-gray-100 px-2 py-1.5 dark:border-gray-800"
+                  class="px-2 pb-1.5 pt-0.5"
                   :session-token-usage="sessionTokenUsage"
                   :agent-status="agentStatus"
                   :current-ai-chat-id="currentAIChatId"
diff --git a/src/components/AIChat/chat/AIThinkingIndicator.vue b/src/components/AIChat/chat/AIThinkingIndicator.vue
index 763ec155..98ec32b7 100644
--- a/src/components/AIChat/chat/AIThinkingIndicator.vue
+++ b/src/components/AIChat/chat/AIThinkingIndicator.vue
@@ -6,7 +6,6 @@ import type { ToolProgress } from '@openchatlab/shared-types'
 
 const { t, te } = useI18n()
 
-// 获取工具的本地化显示名称
 function localizedToolName(name: string, fallback?: string): string {
   const key = `ai.assistant.builtinToolDesc.${name}`
   return te(key) ? t(key) : fallback || name
@@ -18,123 +17,59 @@ function localizedToolProgress(progress?: ToolProgress): string {
   return te(key) ? t(key) : ''
 }
 
-// Props
 const props = defineProps<{
-  // 当前工具执行状态
   currentToolStatus: {
     name: string
     displayName: string
     status: 'running' | 'done' | 'error'
     progress?: ToolProgress
   } | null
-  // 当前轮次已使用的工具列表
-  toolsUsed: string[]
-  // Agent 运行状态
   agentStatus?: AgentRuntimeStatus | null
 }>()
 
 const isCompressing = computed(() => props.agentStatus?.phase === 'compressing')
+const showInitialShimmer = computed(() => !isCompressing.value && !props.currentToolStatus)
+
+const title = computed(() => {
+  if (isCompressing.value) return t('ai.chat.thinking.compressing')
+  if (props.currentToolStatus) {
+    return localizedToolName(props.currentToolStatus.name, props.currentToolStatus.displayName)
+  }
+  return t('ai.chat.thinking.analyzing')
+})
+
+const detail = computed(() => {
+  if (isCompressing.value || !props.currentToolStatus) return ''
+  if (props.currentToolStatus.status === 'running') {
+    return localizedToolProgress(props.currentToolStatus.progress)
+  }
+  if (props.currentToolStatus.status === 'done') return t('ai.chat.thinking.processingResult')
+  return ''
+})
+
+const icon = computed(() => {
+  if (isCompressing.value || props.currentToolStatus?.status === 'running') return 'i-heroicons-arrow-path'
+  if (props.currentToolStatus?.status === 'error') return 'i-heroicons-exclamation-circle'
+  if (props.currentToolStatus) return 'i-heroicons-wrench-screwdriver'
+  return 'i-heroicons-sparkles'
+})
+
+const isIconSpinning = computed(() => isCompressing.value || props.currentToolStatus?.status === 'running')
 </script>
 
 <template>
-  <!-- 压缩上下文状态（工具块样式，无气泡包裹） -->
   <div
-    v-if="isCompressing"
-    class="flex w-fit items-center gap-1.5 rounded-lg bg-gray-100 px-2.5 py-1 text-xs transition-colors dark:bg-gray-800/50"
+    class="ai-live-row flex h-6 min-w-0 items-center gap-1.5 text-sm leading-6 text-gray-500 dark:text-gray-400"
+    :data-running="showInitialShimmer || undefined"
   >
-    <UIcon name="i-heroicons-arrow-path" class="h-3.5 w-3.5 shrink-0 animate-spin text-gray-600 dark:text-gray-400" />
-    <span class="font-medium text-gray-600 dark:text-gray-400">{{ t('ai.chat.thinking.compressing') }}</span>
-  </div>
-
-  <!-- 常规思考/工具状态（头像+气泡） -->
-  <div v-else class="flex items-start gap-3">
-    <!-- AI 头像 -->
-    <div
-      class="flex h-8 w-8 shrink-0 items-center justify-center rounded-full bg-linear-to-br from-pink-500 to-pink-600"
-    >
-      <UIcon name="i-heroicons-sparkles" class="h-4 w-4 text-white" />
-    </div>
-
-    <!-- 状态气泡 -->
-    <div class="rounded-2xl rounded-tl-sm bg-gray-100 px-4 py-3 dark:bg-gray-800">
-      <!-- 工具执行状态 -->
-      <div v-if="currentToolStatus" class="space-y-2">
-        <div class="flex items-center gap-2">
-          <span
-            class="inline-flex items-center gap-1.5 rounded-full px-2.5 py-0.5 text-xs font-medium"
-            :class="[
-              currentToolStatus.status === 'running'
-                ? 'bg-pink-100 text-pink-700 dark:bg-pink-900/30 dark:text-pink-300'
-                : currentToolStatus.status === 'done'
-                  ? 'bg-green-100 text-green-700 dark:bg-green-900/30 dark:text-green-300'
-                  : 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-300',
-            ]"
-          >
-            <UIcon
-              :name="
-                currentToolStatus.status === 'running'
-                  ? 'i-heroicons-cog-6-tooth'
-                  : currentToolStatus.status === 'done'
-                    ? 'i-heroicons-check-circle'
-                    : 'i-heroicons-x-circle'
-              "
-              class="h-3 w-3"
-              :class="{ 'animate-spin': currentToolStatus.status === 'running' }"
-            />
-            {{ localizedToolName(currentToolStatus.name, currentToolStatus.displayName) }}
-          </span>
-
-          <!-- 运行中的动画 -->
-          <span v-if="currentToolStatus.status === 'running'" class="flex gap-1">
-            <span class="h-1.5 w-1.5 animate-bounce rounded-full bg-pink-500 [animation-delay:0ms]" />
-            <span class="h-1.5 w-1.5 animate-bounce rounded-full bg-pink-500 [animation-delay:150ms]" />
-            <span class="h-1.5 w-1.5 animate-bounce rounded-full bg-pink-500 [animation-delay:300ms]" />
-          </span>
-
-          <span
-            v-if="currentToolStatus.status === 'running' && localizedToolProgress(currentToolStatus.progress)"
-            class="text-xs text-gray-500 dark:text-gray-400"
-          >
-            {{ localizedToolProgress(currentToolStatus.progress) }}
-          </span>
-
-          <!-- 完成后处理中状态 -->
-          <span
-            v-else-if="currentToolStatus.status === 'done'"
-            class="flex items-center gap-1.5 text-xs text-gray-500 dark:text-gray-400"
-          >
-            <span>{{ t('ai.chat.thinking.processingResult') }}</span>
-            <span class="flex gap-1">
-              <span class="h-1 w-1 animate-bounce rounded-full bg-gray-400 [animation-delay:0ms]" />
-              <span class="h-1 w-1 animate-bounce rounded-full bg-gray-400 [animation-delay:150ms]" />
-              <span class="h-1 w-1 animate-bounce rounded-full bg-gray-400 [animation-delay:300ms]" />
-            </span>
-          </span>
-        </div>
-
-        <!-- 已使用的工具列表 -->
-        <div v-if="toolsUsed.length > 1" class="flex flex-wrap gap-1">
-          <span class="text-xs text-gray-400">{{ t('ai.chat.thinking.called') }}</span>
-          <span
-            v-for="tool in toolsUsed.slice(0, -1)"
-            :key="tool"
-            class="inline-flex items-center gap-1 rounded-full bg-gray-200 px-2 py-0.5 text-xs text-gray-600 dark:bg-gray-700 dark:text-gray-400"
-          >
-            <UIcon name="i-heroicons-check" class="h-3 w-3 text-green-500" />
-            {{ localizedToolName(tool) }}
-          </span>
-        </div>
-      </div>
-
-      <!-- 默认状态（无工具调用） -->
-      <div v-else class="flex items-center gap-2">
-        <span class="text-sm text-gray-600 dark:text-gray-400">{{ t('ai.chat.thinking.analyzing') }}</span>
-        <span class="flex gap-1">
-          <span class="h-2 w-2 animate-bounce rounded-full bg-pink-500 [animation-delay:0ms]" />
-          <span class="h-2 w-2 animate-bounce rounded-full bg-pink-500 [animation-delay:150ms]" />
-          <span class="h-2 w-2 animate-bounce rounded-full bg-pink-500 [animation-delay:300ms]" />
-        </span>
-      </div>
-    </div>
+    <UIcon
+      :name="icon"
+      class="h-3.5 w-3.5 shrink-0 text-gray-400 dark:text-gray-500"
+      :class="[isIconSpinning ? 'animate-spin text-primary-500 dark:text-primary-400' : '']"
+    />
+    <span class="min-w-0 truncate">
+      <span class="text-gray-600 dark:text-gray-300">{{ title }}</span>
+      <span v-if="detail" class="text-gray-400 dark:text-gray-500">· {{ detail }}</span>
+    </span>
   </div>
 </template>
diff --git a/src/components/AIChat/chat/ChatMessage.vue b/src/components/AIChat/chat/ChatMessage.vue
index 766fabcf..3287fe4f 100644
--- a/src/components/AIChat/chat/ChatMessage.vue
+++ b/src/components/AIChat/chat/ChatMessage.vue
@@ -11,10 +11,16 @@ import EvidenceBlock from './EvidenceBlock.vue'
 import { useToast } from '@/composables/useToast'
 import { stripChartImagePlaceholders } from '@/services/ai/chartMarkdownPlaceholders'
 import { shouldHideRecoverableChartError } from '@/stores/aiChatChartBlocks'
+import type { ToolProgress } from '@openchatlab/shared-types'
+import LiveFollowText from './LiveFollowText.vue'
+import { getFirstLine, getLatestLine } from './liveFollowText'
 import {
   buildProcessSegments,
-  getProcessSegmentStatusLabel,
+  findRepresentativeProcessThought,
+  formatProcessDuration,
+  getProcessSegmentDurationMs,
   getVisibleSegmentBlocks,
+  resolveProcessHeaderActivity,
   type ProcessSegment,
 } from './chatMessageProcessSegments'
 
@@ -33,6 +39,13 @@ const props = defineProps<{
   /** 是否显示截屏按钮（仅 AI 回复） */
   showCaptureButton?: boolean
   editable?: boolean
+  /** Live tool status for the streaming process header. */
+  activeTool?: {
+    name: string
+    displayName: string
+    status: 'running' | 'done' | 'error'
+    progress?: ToolProgress
+  } | null
 }>()
 
 const emit = defineEmits<{
@@ -220,7 +233,8 @@ function isLastVisibleBlock(block: ContentBlock): boolean {
 }
 
 function isProcessingProcessSegment(segmentIndex: number): boolean {
-  return !!props.isStreaming && renderSegments.value[segmentIndex]?.type === 'process'
+  const segment = renderSegments.value[segmentIndex]
+  return segment?.type === 'process' && !!props.isStreaming
 }
 
 function getProcessSegmentStepCount(segment: ProcessSegment<ContentBlock>): number {
@@ -234,28 +248,6 @@ function getProcessSegmentStepLabel(segment: ProcessSegment<ContentBlock>): stri
   return t(key, { count })
 }
 
-function getSingleLineText(text: string): string {
-  return text.replace(/\s+/g, ' ').trim()
-}
-
-function getProcessSegmentPreview(segment: ProcessSegment<ContentBlock>): string {
-  if (segment.type !== 'process') return ''
-
-  for (let index = segment.blocks.length - 1; index >= 0; index -= 1) {
-    const block = segment.blocks[index]
-    if (block.type === 'text' || block.type === 'think' || block.type === 'plan_draft') {
-      const text = getSingleLineText(block.text)
-      if (text) return text
-    }
-    if (block.type === 'tool') return getToolDisplayName(block.tool)
-    if (block.type === 'skill') return block.skillName
-    if (block.type === 'plan') return block.plan.title
-    if (block.type === 'error') return block.error.message ?? block.error.name ?? ''
-  }
-
-  return ''
-}
-
 function hasProcessSegmentError(segment: ProcessSegment<ContentBlock> | undefined): boolean {
   if (segment?.type !== 'process') return false
   return segment.blocks.some(
@@ -269,18 +261,125 @@ function getBlockDurationMs(block: ContentBlock): number {
   return 0
 }
 
-function getProcessSegmentLabel(segment: ProcessSegment<ContentBlock>, segmentIndex: number): string {
-  return getProcessSegmentStatusLabel(segment, {
-    getBlockDurationMs,
-    isProcessing: isProcessingProcessSegment(segmentIndex),
-    labels: {
-      processed: t('ai.chat.message.process.processed'),
-      processing: t('ai.chat.message.process.processing'),
-    },
-    locale: locale.value,
+function getLastFoldableProcessBlock(
+  segment: ProcessSegment<ContentBlock>
+): Extract<ContentBlock, { type: 'tool' | 'think' | 'skill' | 'plan' | 'plan_draft' | 'error' }> | undefined {
+  if (segment.type !== 'process') return undefined
+  for (let index = segment.blocks.length - 1; index >= 0; index -= 1) {
+    const block = segment.blocks[index]
+    if (isFoldableProcessBlock(block)) {
+      return block as Extract<ContentBlock, { type: 'tool' | 'think' | 'skill' | 'plan' | 'plan_draft' | 'error' }>
+    }
+  }
+  return undefined
+}
+
+function getRepresentativeThinkBlock(segment: ProcessSegment<ContentBlock>) {
+  return segment.type === 'process' ? findRepresentativeProcessThought(segment.blocks) : undefined
+}
+
+function getProcessHeaderActivity(segment: ProcessSegment<ContentBlock>, segmentIndex: number) {
+  const lastFoldable = getLastFoldableProcessBlock(segment)
+  return resolveProcessHeaderActivity({
+    isActive: isProcessingProcessSegment(segmentIndex),
+    activeToolName: props.activeTool?.status === 'running' ? props.activeTool.name : undefined,
+    activeToolProgressPhase: props.activeTool?.status === 'running' ? props.activeTool.progress?.phase : undefined,
+    lastFoldable: lastFoldable
+      ? {
+          kind: lastFoldable.type,
+          name:
+            lastFoldable.type === 'tool'
+              ? lastFoldable.tool.name
+              : lastFoldable.type === 'skill'
+                ? lastFoldable.skillName
+                : undefined,
+        }
+      : undefined,
   })
 }
 
+function getProcessHeaderTitle(segment: ProcessSegment<ContentBlock>, segmentIndex: number): string {
+  if (!isProcessingProcessSegment(segmentIndex)) {
+    const thinkBlock = getRepresentativeThinkBlock(segment)
+    if (thinkBlock) return getThinkLabel(thinkBlock.tag)
+    return t('ai.chat.message.process.label')
+  }
+
+  const activity = getProcessHeaderActivity(segment, segmentIndex)
+  if (activity.type === 'tool') {
+    if (props.activeTool?.status === 'running' && props.activeTool.name === activity.name) {
+      return getToolDisplayName(props.activeTool)
+    }
+    const toolBlock =
+      segment.type === 'process'
+        ? segment.blocks.find((block) => block.type === 'tool' && block.tool.name === activity.name)
+        : undefined
+    return toolBlock?.type === 'tool' ? getToolDisplayName(toolBlock.tool) : activity.name
+  }
+  if (activity.type === 'think') return t('ai.chat.message.think.loading')
+  if (activity.type === 'skill') return t('ai.skill.active.label', { name: activity.name })
+  if (activity.type === 'plan') return t('ai.chat.message.process.planning')
+  return t('ai.chat.message.process.working')
+}
+
+function getProcessHeaderMeta(segment: ProcessSegment<ContentBlock>, segmentIndex: number): string {
+  if (isProcessingProcessSegment(segmentIndex)) {
+    const activity = getProcessHeaderActivity(segment, segmentIndex)
+    if (activity.type === 'tool' && activity.progressPhase) {
+      const key = `ai.chat.thinking.toolProgress.${activity.progressPhase}`
+      return te(key) ? t(key) : ''
+    }
+    return ''
+  }
+
+  if (hasProcessSegmentError(segment)) return t('ai.chat.message.process.failed')
+
+  const parts = [getProcessSegmentStepLabel(segment)]
+  const durationMs = getProcessSegmentDurationMs(segment, getBlockDurationMs)
+  if (durationMs > 0) parts.push(formatProcessDuration(durationMs, locale.value))
+  return parts.join(' · ')
+}
+
+function getProcessHeaderPreview(segment: ProcessSegment<ContentBlock>, segmentIndex: number): string {
+  if (segment.type !== 'process') return ''
+
+  if (!isProcessingProcessSegment(segmentIndex)) {
+    const thinkBlock = getRepresentativeThinkBlock(segment)
+    return thinkBlock ? getFirstLine(thinkBlock.text) : ''
+  }
+
+  if (props.activeTool?.status === 'running') return ''
+
+  for (let index = segment.blocks.length - 1; index >= 0; index -= 1) {
+    const block = segment.blocks[index]
+    if (block.type === 'think' || block.type === 'plan_draft' || block.type === 'text') {
+      const line = getLatestLine(block.text)
+      if (line) return line
+    }
+  }
+
+  return ''
+}
+
+function getProcessHeaderIcon(segment: ProcessSegment<ContentBlock>, segmentIndex: number): string {
+  if (hasProcessSegmentError(segment)) return 'i-heroicons-exclamation-circle'
+
+  if (!isProcessingProcessSegment(segmentIndex)) {
+    return getRepresentativeThinkBlock(segment) ? 'i-heroicons-light-bulb' : 'i-heroicons-queue-list'
+  }
+
+  const activity = getProcessHeaderActivity(segment, segmentIndex)
+  if (activity.type === 'tool') return 'i-heroicons-wrench-screwdriver'
+  if (activity.type === 'think') return 'i-heroicons-light-bulb'
+  if (activity.type === 'skill') return 'i-heroicons-bolt'
+  if (activity.type === 'plan') return 'i-heroicons-clipboard-document-list'
+  return 'i-heroicons-sparkles'
+}
+
+function isLiveThinkBlock(block: ContentBlock): boolean {
+  return block.type === 'think' && !!props.isStreaming && !block.durationMs
+}
+
 // 是否使用 contentBlocks 渲染（AI 消息且有内容块）
 const useBlocksRendering = computed(() => {
   return props.role === 'assistant' && visibleBlocks.value.length > 0
@@ -694,39 +793,59 @@ async function handleCopyMarkdown() {
       <template v-else-if="useBlocksRendering">
         <div class="space-y-2">
           <template v-for="(segment, segmentIdx) in renderSegments" :key="segmentIdx">
-            <div :class="[segment.type === 'process' ? 'py-1' : '']">
+            <div>
               <button
                 v-if="segment.type === 'process'"
                 type="button"
-                class="flex w-full min-w-0 max-w-full items-center gap-1.5 rounded-md px-1 py-1 text-left text-xs text-gray-400 transition-colors hover:text-gray-600 focus:outline-none focus-visible:bg-gray-50 dark:text-gray-500 dark:hover:text-gray-300 dark:focus-visible:bg-gray-800/30"
+                class="ai-live-row group/process flex h-6 w-full min-w-0 max-w-full items-center text-left text-sm leading-6 text-gray-500 transition-colors hover:text-gray-700 focus:outline-none focus-visible:bg-gray-50 dark:text-gray-400 dark:hover:text-gray-200 dark:focus-visible:bg-gray-800/30"
+                :data-running="isProcessingProcessSegment(segmentIdx) || undefined"
                 :aria-expanded="isProcessSegmentOpen(segmentIdx)"
                 @click="toggleProcessSegment(segmentIdx)"
               >
-                <UIcon
-                  :name="isProcessSegmentOpen(segmentIdx) ? 'i-heroicons-chevron-down' : 'i-heroicons-chevron-right'"
-                  class="h-3 w-3 shrink-0"
-                />
-                <UIcon
-                  v-if="isProcessingProcessSegment(segmentIdx)"
-                  name="i-heroicons-arrow-path"
-                  class="h-3 w-3 shrink-0 animate-spin text-primary-500"
-                />
-                <UIcon
-                  v-else-if="hasProcessSegmentError(segment)"
-                  name="i-heroicons-exclamation-circle"
-                  class="h-3 w-3 shrink-0 text-amber-500"
-                />
-                <span class="shrink-0 font-medium text-gray-500 dark:text-gray-400">
-                  {{ t('ai.chat.message.process.label') }}
+                <span class="relative mr-1.5 flex h-4 w-4 shrink-0 items-center justify-center">
+                  <UIcon
+                    v-if="isProcessSegmentOpen(segmentIdx)"
+                    name="i-heroicons-chevron-down"
+                    class="h-3.5 w-3.5 text-gray-500 dark:text-gray-400"
+                  />
+                  <template v-else>
+                    <UIcon
+                      :name="getProcessHeaderIcon(segment, segmentIdx)"
+                      class="absolute h-3.5 w-3.5 text-gray-400 transition-opacity duration-100 group-hover/process:opacity-0 dark:text-gray-500"
+                      :class="[hasProcessSegmentError(segment) ? 'text-amber-500 dark:text-amber-400' : '']"
+                    />
+                    <UIcon
+                      name="i-heroicons-chevron-down"
+                      class="absolute h-3.5 w-3.5 text-gray-500 opacity-0 transition-opacity duration-100 group-hover/process:opacity-100 dark:text-gray-400"
+                    />
+                  </template>
                 </span>
-                <span class="shrink-0 text-gray-400 dark:text-gray-500">
-                  · {{ getProcessSegmentLabel(segment, segmentIdx) }} · {{ getProcessSegmentStepLabel(segment) }}
+                <span class="shrink-0 text-gray-600 dark:text-gray-300">
+                  {{ getProcessHeaderTitle(segment, segmentIdx) }}
                 </span>
+                <template v-if="!isProcessSegmentOpen(segmentIdx) && getProcessHeaderPreview(segment, segmentIdx)">
+                  <span
+                    class="mx-2 h-0.5 w-0.5 shrink-0 rounded-full bg-gray-300 dark:bg-gray-600"
+                    aria-hidden="true"
+                  />
+                  <LiveFollowText
+                    :text="getProcessHeaderPreview(segment, segmentIdx)"
+                    :follow-end="isProcessingProcessSegment(segmentIdx)"
+                  />
+                </template>
                 <span
-                  v-if="getProcessSegmentPreview(segment)"
-                  class="min-w-0 flex-1 truncate text-gray-400/80 dark:text-gray-500/80"
+                  v-if="getProcessHeaderMeta(segment, segmentIdx)"
+                  class="shrink-0 text-xs text-gray-400 dark:text-gray-500"
+                  :class="[
+                    !isProcessSegmentOpen(segmentIdx) && getProcessHeaderPreview(segment, segmentIdx)
+                      ? 'ml-3'
+                      : 'ml-1.5',
+                  ]"
                 >
-                  · {{ getProcessSegmentPreview(segment) }}
+                  <span v-if="isProcessSegmentOpen(segmentIdx) || !getProcessHeaderPreview(segment, segmentIdx)">
+                    ·
+                  </span>
+                  {{ getProcessHeaderMeta(segment, segmentIdx) }}
                 </span>
               </button>
 
@@ -734,7 +853,7 @@ async function handleCopyMarkdown() {
                 v-show="segment.type !== 'process' || isProcessSegmentOpen(segmentIdx)"
                 :class="[
                   segment.type === 'process'
-                    ? 'ml-1.5 mt-1 space-y-1.5 border-l border-gray-200 pl-3 dark:border-gray-800'
+                    ? 'ml-1.5 mt-1 space-y-0.5 border-l border-gray-200/80 pl-3 dark:border-white/10'
                     : '',
                 ]"
               >
@@ -743,9 +862,7 @@ async function handleCopyMarkdown() {
                   <div
                     v-if="block.type === 'text'"
                     class="py-1 text-gray-900 dark:text-gray-100"
-                    :class="[
-                      segment.type === 'process' ? 'rounded-lg px-2 text-xs text-gray-500 dark:text-gray-400' : '',
-                    ]"
+                    :class="[segment.type === 'process' ? 'text-xs text-gray-500 dark:text-gray-400' : '']"
                   >
                     <div
                       class="prose prose-sm dark:prose-invert max-w-none leading-relaxed"
@@ -762,33 +879,40 @@ async function handleCopyMarkdown() {
                   <!-- 思考块（默认折叠） -->
                   <details
                     v-else-if="block.type === 'think'"
-                    class="group rounded-lg px-2 py-1.5 text-sm text-gray-500 transition-colors hover:bg-gray-50 dark:text-gray-400 dark:hover:bg-gray-800/30"
+                    class="group group/think w-full text-sm text-gray-500 dark:text-gray-400"
                   >
                     <summary
-                      class="flex min-w-0 cursor-pointer select-none items-center gap-2 text-xs font-medium transition-colors hover:text-gray-700 dark:hover:text-gray-300"
+                      class="ai-live-row flex h-6 min-w-0 cursor-pointer list-none select-none items-center text-sm leading-6 transition-colors hover:text-gray-700 dark:hover:text-gray-300 [&::-webkit-details-marker]:hidden"
+                      :data-running="isLiveThinkBlock(block) || undefined"
                     >
-                      <span class="shrink-0">{{ getThinkLabel(block.tag) }}</span>
-                      <span
-                        class="min-w-0 flex-1 truncate font-normal text-gray-400 group-open:hidden dark:text-gray-500"
-                      >
-                        {{ getSingleLineText(block.text) }}
+                      <span class="relative mr-1.5 flex h-4 w-4 shrink-0 items-center justify-center">
+                        <UIcon
+                          name="i-heroicons-light-bulb"
+                          class="absolute h-3.5 w-3.5 text-gray-400 transition-opacity duration-100 group-hover/think:opacity-0 group-open:hidden dark:text-gray-500"
+                        />
+                        <UIcon
+                          name="i-heroicons-chevron-down"
+                          class="absolute h-3.5 w-3.5 text-gray-500 opacity-0 transition-opacity duration-100 group-hover/think:opacity-100 group-open:opacity-100 dark:text-gray-400"
+                        />
                       </span>
-                      <span v-if="block.durationMs" class="shrink-0 text-xs text-gray-400 dark:text-gray-500">
+                      <span class="shrink-0 text-gray-600 dark:text-gray-300">
+                        {{ getThinkLabel(block.tag) }}
+                      </span>
+                      <span
+                        v-if="getFirstLine(block.text) || isLiveThinkBlock(block)"
+                        class="mx-2 h-0.5 w-0.5 shrink-0 rounded-full bg-gray-300 group-open:hidden dark:bg-gray-600"
+                        aria-hidden="true"
+                      />
+                      <LiveFollowText
+                        class="group-open:hidden"
+                        :text="isLiveThinkBlock(block) ? getLatestLine(block.text) : getFirstLine(block.text)"
+                        :follow-end="isLiveThinkBlock(block)"
+                      />
+                      <span v-if="block.durationMs" class="ml-3 shrink-0 text-xs text-gray-400 dark:text-gray-500">
                         {{ formatThinkDuration(block.durationMs) }}
                       </span>
-                      <span
-                        v-if="isStreaming && isLastVisibleBlock(block)"
-                        class="inline-flex shrink-0 items-center gap-1 text-[11px] text-gray-400 dark:text-gray-500"
-                      >
-                        <span>{{ t('ai.chat.message.think.loading') }}</span>
-                        <span class="flex gap-0.5">
-                          <span class="h-1 w-1 animate-bounce rounded-full bg-gray-400 [animation-delay:0ms]" />
-                          <span class="h-1 w-1 animate-bounce rounded-full bg-gray-400 [animation-delay:150ms]" />
-                          <span class="h-1 w-1 animate-bounce rounded-full bg-gray-400 [animation-delay:300ms]" />
-                        </span>
-                      </span>
                     </summary>
-                    <div class="mt-2 prose prose-sm dark:prose-invert max-w-none leading-relaxed text-xs">
+                    <div class="prose prose-sm dark:prose-invert mt-1 max-w-none pl-[22px] text-[13px] leading-6">
                       <template v-if="block.tag === 'plan_validation' && getPlanValidation(block.text)">
                         <div
                           v-if="getPlanValidation(block.text)?.title"
@@ -839,22 +963,22 @@ async function handleCopyMarkdown() {
                   <!-- 技能块 -->
                   <div
                     v-else-if="block.type === 'skill'"
-                    class="inline-flex items-center gap-1.5 rounded-lg bg-gray-50 px-3 py-1.5 text-xs font-medium text-gray-600 dark:bg-gray-800/50 dark:text-gray-400"
+                    class="flex items-center gap-2 py-1 text-xs font-medium text-gray-600 dark:text-gray-300"
                   >
-                    <UIcon name="i-heroicons-bolt" class="h-3.5 w-3.5" />
+                    <UIcon name="i-heroicons-bolt" class="h-3.5 w-3.5 shrink-0 text-gray-400" />
                     <span>{{ t('ai.skill.active.label', { name: block.skillName }) }}</span>
                   </div>
 
                   <!-- 计划块 -->
                   <details
                     v-else-if="block.type === 'plan'"
-                    class="rounded-lg px-2 py-1.5 text-sm text-gray-600 transition-colors hover:bg-white/70 dark:text-gray-400 dark:hover:bg-gray-800/40"
+                    class="group w-full text-sm text-gray-600 dark:text-gray-400"
                   >
                     <summary
-                      class="flex cursor-pointer select-none items-center gap-2 text-xs font-medium text-gray-500 transition-colors hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-300"
+                      class="flex cursor-pointer select-none items-center gap-2 rounded-md py-1 text-xs font-medium text-gray-500 transition-colors hover:bg-gray-50/80 hover:text-gray-700 dark:hover:bg-gray-800/30 dark:hover:text-gray-300"
                     >
-                      <UIcon name="i-heroicons-clipboard-document-list" class="h-3.5 w-3.5 shrink-0" />
-                      <span class="min-w-0 truncate">
+                      <UIcon name="i-heroicons-clipboard-document-list" class="h-3.5 w-3.5 shrink-0 text-gray-400" />
+                      <span class="min-w-0 truncate text-gray-600 dark:text-gray-300">
                         {{ t('ai.chat.message.plan.label') }} · {{ block.plan.title }}
                       </span>
                     </summary>
@@ -897,22 +1021,12 @@ async function handleCopyMarkdown() {
                   </details>
 
                   <!-- 计划草稿块 -->
-                  <div
-                    v-else-if="block.type === 'plan_draft'"
-                    class="rounded-lg px-2 py-1.5 text-sm text-gray-600 dark:text-gray-400"
-                  >
-                    <div class="flex items-center gap-2 text-xs font-medium text-gray-500 dark:text-gray-400">
-                      <UIcon name="i-heroicons-clipboard-document-list" class="h-3.5 w-3.5 shrink-0" />
+                  <div v-else-if="block.type === 'plan_draft'" class="py-1 text-sm text-gray-600 dark:text-gray-400">
+                    <div class="flex items-center gap-2 text-xs font-medium text-gray-600 dark:text-gray-300">
+                      <UIcon name="i-heroicons-clipboard-document-list" class="h-3.5 w-3.5 shrink-0 text-gray-400" />
                       <span>{{ t('ai.chat.message.plan.label') }}</span>
-                      <span
-                        v-if="isStreaming"
-                        class="inline-flex items-center gap-1 text-[11px] font-normal text-gray-400 dark:text-gray-500"
-                      >
-                        <span class="flex gap-0.5">
-                          <span class="h-1 w-1 animate-bounce rounded-full bg-gray-400 [animation-delay:0ms]" />
-                          <span class="h-1 w-1 animate-bounce rounded-full bg-gray-400 [animation-delay:150ms]" />
-                          <span class="h-1 w-1 animate-bounce rounded-full bg-gray-400 [animation-delay:300ms]" />
-                        </span>
+                      <span v-if="isStreaming" class="text-[11px] font-normal text-gray-400 dark:text-gray-500">
+                        {{ t('ai.chat.message.process.planning') }}
                       </span>
                     </div>
                     <div
@@ -928,49 +1042,48 @@ async function handleCopyMarkdown() {
                   <EvidenceBlock v-else-if="block.type === 'evidence'" :evidence="block.evidence" />
 
                   <!-- 工具块：有结果时可展开查看发送给 AI 的安全文本 -->
-                  <details v-else-if="block.type === 'tool' && hasToolResult(block.tool)" class="w-full max-w-full">
+                  <details
+                    v-else-if="block.type === 'tool' && hasToolResult(block.tool)"
+                    class="group w-full max-w-full"
+                  >
                     <summary
-                      class="inline-flex cursor-pointer list-none select-none [&::-webkit-details-marker]:hidden"
+                      class="flex cursor-pointer list-none select-none items-center gap-2 rounded-md py-1 text-xs text-gray-500 transition-colors hover:bg-gray-50/80 dark:text-gray-400 dark:hover:bg-gray-800/30 [&::-webkit-details-marker]:hidden"
+                      :class="[block.tool.status === 'error' ? 'text-amber-700 dark:text-amber-400' : '']"
                     >
-                      <div
-                        class="flex w-fit items-center gap-1.5 rounded-lg bg-gray-50 px-2.5 py-1 text-xs text-gray-500 transition-colors hover:bg-gray-100 dark:bg-gray-800/30 dark:text-gray-400/80 dark:hover:bg-gray-800/60"
+                      <UIcon
+                        :name="
+                          block.tool.status === 'error'
+                            ? 'i-heroicons-exclamation-circle'
+                            : 'i-heroicons-wrench-screwdriver'
+                        "
+                        class="h-3.5 w-3.5 shrink-0"
+                        :class="[block.tool.status === 'error' ? 'text-amber-500' : 'text-gray-400']"
+                      />
+                      <span
+                        class="shrink-0 font-medium"
                         :class="[
                           block.tool.status === 'error'
-                            ? 'bg-red-50 text-red-600 dark:bg-red-900/20 dark:text-red-400'
-                            : '',
+                            ? 'text-amber-700 dark:text-amber-300'
+                            : 'text-gray-600 dark:text-gray-300',
                         ]"
                       >
-                        <UIcon
-                          :name="
-                            block.tool.status === 'error'
-                              ? 'i-heroicons-exclamation-circle'
-                              : 'i-heroicons-wrench-screwdriver'
-                          "
-                          class="h-3.5 w-3.5 shrink-0"
-                        />
-                        <div class="flex min-w-0 items-baseline gap-1.5 font-medium">
-                          <span>{{ getToolDisplayName(block.tool) }}</span>
-                          <span
-                            v-if="formatToolParams(block.tool)"
-                            class="max-w-[200px] truncate text-[11px] font-normal opacity-75 sm:max-w-[300px]"
-                          >
-                            {{ formatToolParams(block.tool) }}
-                          </span>
-                          <span class="shrink-0 text-[11px] font-normal opacity-75">
-                            · {{ t('ai.chat.message.toolResult.view') }}
-                          </span>
-                        </div>
-                        <UIcon
-                          name="i-heroicons-chevron-right"
-                          class="h-3 w-3 shrink-0 transition-transform [[open]>&]:rotate-90"
-                        />
-                      </div>
+                        {{ getToolDisplayName(block.tool) }}
+                      </span>
+                      <span
+                        v-if="formatToolParams(block.tool)"
+                        class="min-w-0 truncate text-[11px] text-gray-400 dark:text-gray-500"
+                      >
+                        {{ formatToolParams(block.tool) }}
+                      </span>
+                      <span class="ml-auto shrink-0 text-[11px] text-gray-400 dark:text-gray-500">
+                        {{ t('ai.chat.message.toolResult.view') }}
+                      </span>
                     </summary>
                     <div
-                      class="mt-2 max-w-full rounded-lg border border-gray-200 bg-gray-50/80 dark:border-gray-700/70 dark:bg-page-dark/40"
+                      class="mt-1 max-w-full rounded-lg bg-gray-50/80 ring-1 ring-gray-200/60 dark:bg-white/[0.03] dark:ring-white/5"
                     >
                       <div
-                        class="flex items-center justify-between gap-2 border-b border-gray-200/70 px-3 py-2 dark:border-gray-700/70"
+                        class="flex items-center justify-between gap-2 border-b border-gray-200/60 px-3 py-2 dark:border-white/5"
                       >
                         <span class="text-xs font-medium text-gray-500 dark:text-gray-400">
                           {{ t('ai.chat.message.toolResult.title') }}
@@ -1000,62 +1113,65 @@ async function handleCopyMarkdown() {
                   <!-- 工具块：运行中或无结果时保持紧凑展示 -->
                   <div
                     v-else-if="block.type === 'tool'"
-                    class="flex w-fit items-center gap-1.5 rounded-lg px-2.5 py-1 text-xs transition-colors"
+                    class="ai-live-row flex min-w-0 items-center gap-2 py-1 text-xs"
+                    :data-running="block.tool.status === 'running' || undefined"
                     :class="[
-                      block.tool.status === 'running'
-                        ? 'bg-gray-100 text-gray-600 dark:bg-gray-800/50 dark:text-gray-400'
-                        : block.tool.status === 'done'
-                          ? 'bg-gray-50 text-gray-500 dark:bg-gray-800/30 dark:text-gray-400/80'
-                          : 'bg-red-50 text-red-600 dark:bg-red-900/20 dark:text-red-400',
+                      block.tool.status === 'error'
+                        ? 'text-amber-700 dark:text-amber-400'
+                        : 'text-gray-500 dark:text-gray-400',
                     ]"
                   >
                     <UIcon
                       :name="
                         block.tool.status === 'running'
                           ? 'i-heroicons-arrow-path'
-                          : block.tool.status === 'done'
-                            ? 'i-heroicons-wrench-screwdriver'
-                            : 'i-heroicons-exclamation-circle'
+                          : block.tool.status === 'error'
+                            ? 'i-heroicons-exclamation-circle'
+                            : 'i-heroicons-wrench-screwdriver'
                       "
                       class="h-3.5 w-3.5 shrink-0"
-                      :class="[block.tool.status === 'running' ? 'animate-spin' : '']"
+                      :class="[
+                        block.tool.status === 'running'
+                          ? 'animate-spin text-primary-500'
+                          : block.tool.status === 'error'
+                            ? 'text-amber-500'
+                            : 'text-gray-400',
+                      ]"
                     />
-                    <div class="flex min-w-0 items-baseline gap-1.5 font-medium">
-                      <span>{{ getToolDisplayName(block.tool) }}</span>
-                      <span
-                        v-if="formatToolParams(block.tool)"
-                        class="max-w-[200px] truncate text-[11px] font-normal opacity-75 sm:max-w-[300px]"
-                      >
-                        {{ formatToolParams(block.tool) }}
-                      </span>
-                      <span
-                        v-if="block.tool.status === 'done' && block.tool.durationMs"
-                        class="shrink-0 text-[11px] font-normal opacity-75"
-                      >
-                        · {{ formatThinkDuration(block.tool.durationMs) }}
-                      </span>
-                    </div>
+                    <span
+                      class="shrink-0 font-medium"
+                      :class="[
+                        block.tool.status === 'error'
+                          ? 'text-amber-700 dark:text-amber-300'
+                          : 'text-gray-600 dark:text-gray-300',
+                      ]"
+                    >
+                      {{ getToolDisplayName(block.tool) }}
+                    </span>
+                    <span
+                      v-if="formatToolParams(block.tool)"
+                      class="min-w-0 truncate text-[11px] text-gray-400 dark:text-gray-500"
+                    >
+                      {{ formatToolParams(block.tool) }}
+                    </span>
+                    <span
+                      v-if="block.tool.status === 'done' && block.tool.durationMs"
+                      class="ml-auto shrink-0 text-[11px] text-gray-400 dark:text-gray-500"
+                    >
+                      {{ formatThinkDuration(block.tool.durationMs) }}
+                    </span>
                   </div>
 
                   <!-- 错误块 -->
-                  <ErrorBlock v-else-if="block.type === 'error'" :error="block.error" />
+                  <ErrorBlock
+                    v-else-if="block.type === 'error'"
+                    :error="block.error"
+                    :compact="segment.type === 'process'"
+                  />
                 </template>
               </div>
             </div>
           </template>
-
-          <!-- 流式处理中指示器（当最后一个块是已完成的工具块时显示） -->
-          <div
-            v-if="isStreaming && visibleBlocks.length > 0 && visibleBlocks[visibleBlocks.length - 1].type === 'tool'"
-            class="flex items-center gap-2 px-1 py-2 text-sm text-gray-500 dark:text-gray-400"
-          >
-            <span class="flex gap-1">
-              <span class="h-1.5 w-1.5 animate-bounce rounded-full bg-gray-400 [animation-delay:0ms]" />
-              <span class="h-1.5 w-1.5 animate-bounce rounded-full bg-gray-400 [animation-delay:150ms]" />
-              <span class="h-1.5 w-1.5 animate-bounce rounded-full bg-gray-400 [animation-delay:300ms]" />
-            </span>
-            <span>{{ t('ai.chat.message.generating') }}</span>
-          </div>
         </div>
       </template>
 
@@ -1114,4 +1230,50 @@ async function handleCopyMarkdown() {
   </div>
 </template>
 
-<!-- Markdown 样式已提取到全局 src/assets/styles/markdown.css -->
+<style>
+.ai-live-row {
+  position: relative;
+  overflow: hidden;
+}
+
+.ai-live-row[data-running]::after {
+  content: '';
+  position: absolute;
+  inset-block: 0;
+  left: 0;
+  width: 300px;
+  background: linear-gradient(
+    90deg,
+    transparent 0%,
+    color-mix(in srgb, var(--color-page-bg) 60%, transparent) 55%,
+    transparent 100%
+  );
+  animation: ai-live-row-sweep 4s ease-out infinite;
+  pointer-events: none;
+}
+
+.dark .ai-live-row[data-running]::after {
+  background: linear-gradient(
+    90deg,
+    transparent 0%,
+    color-mix(in srgb, var(--color-page-dark) 60%, transparent) 55%,
+    transparent 100%
+  );
+}
+
+@keyframes ai-live-row-sweep {
+  0% {
+    left: -300px;
+  }
+  75%,
+  100% {
+    left: 100%;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .ai-live-row[data-running]::after {
+    animation: none;
+  }
+}
+</style>
diff --git a/src/components/AIChat/chat/ChatStatusBar.vue b/src/components/AIChat/chat/ChatStatusBar.vue
index b499c94a..23ea6151 100644
--- a/src/components/AIChat/chat/ChatStatusBar.vue
+++ b/src/components/AIChat/chat/ChatStatusBar.vue
@@ -51,27 +51,20 @@ const agentPhaseShortText = computed(() => {
   return t(`ai.chat.statusBar.agent.phaseShort.${props.agentStatus.phase}`)
 })
 
-const agentPhaseClass = computed(() => {
-  if (!props.agentStatus) return 'text-gray-500 bg-gray-100 dark:bg-gray-800 dark:text-gray-300'
+const isLiveAgentPhase = computed(() => {
+  const phase = props.agentStatus?.phase
+  return (
+    phase === 'compressing' ||
+    phase === 'preparing' ||
+    phase === 'thinking' ||
+    phase === 'tool_running' ||
+    phase === 'responding'
+  )
+})
 
-  switch (props.agentStatus.phase) {
-    case 'compressing':
-      return 'text-purple-600 bg-purple-50 dark:bg-purple-900/30 dark:text-purple-300'
-    case 'tool_running':
-      return 'text-indigo-600 bg-indigo-50 dark:bg-indigo-900/30 dark:text-indigo-300'
-    case 'thinking':
-      return 'text-blue-600 bg-blue-50 dark:bg-blue-900/30 dark:text-blue-300'
-    case 'responding':
-      return 'text-emerald-600 bg-emerald-50 dark:bg-emerald-900/30 dark:text-emerald-300'
-    case 'completed':
-      return 'text-green-600 bg-green-50 dark:bg-green-900/30 dark:text-green-300'
-    case 'aborted':
-      return 'text-amber-600 bg-amber-50 dark:bg-amber-900/30 dark:text-amber-300'
-    case 'error':
-      return 'text-red-600 bg-red-50 dark:bg-red-900/30 dark:text-red-300'
-    default:
-      return 'text-gray-500 bg-gray-100 dark:bg-gray-800 dark:text-gray-300'
-  }
+const showAgentPhase = computed(() => {
+  const phase = props.agentStatus?.phase
+  return isLiveAgentPhase.value || phase === 'error'
 })
 
 function formatNumber(value: number): string {
@@ -336,14 +329,15 @@ const thinkingLevelLabel = computed(() => {
     <!-- 右侧：配置状态指示 -->
     <div class="flex items-center gap-1">
       <div
-        v-if="agentStatus"
-        class="hidden shrink-0 items-center gap-1 rounded-lg bg-gray-50/90 px-1.5 py-1 text-xs shadow-[inset_0_0_0_1px_rgba(255,255,255,0.35)] dark:bg-gray-800/70 dark:shadow-[inset_0_0_0_1px_rgba(255,255,255,0.04)] lg:flex"
+        v-if="showAgentPhase"
+        class="hidden shrink-0 items-center gap-1.5 px-1.5 py-1 text-[11px] text-gray-400 lg:flex dark:text-gray-500"
         :title="agentCompactTitle"
       >
-        <!-- 主栏只展示阶段，context token 放进 tooltip，避免和累计 token 混淆。 -->
-        <span class="rounded px-1 py-0.5 text-[10px] font-medium" :class="agentPhaseClass">
-          {{ agentPhaseShortText }}
-        </span>
+        <span
+          class="h-1.5 w-1.5 rounded-full"
+          :class="[agentStatus?.phase === 'error' ? 'bg-amber-500' : 'bg-primary-500 animate-pulse']"
+        />
+        <span>{{ agentPhaseShortText }}</span>
       </div>
 
       <!-- Context 进度条 -->
diff --git a/src/components/AIChat/chat/ErrorBlock.vue b/src/components/AIChat/chat/ErrorBlock.vue
index d52c0cfb..6cff2591 100644
--- a/src/components/AIChat/chat/ErrorBlock.vue
+++ b/src/components/AIChat/chat/ErrorBlock.vue
@@ -6,8 +6,9 @@ import ErrorDetailModal from './ErrorDetailModal.vue'
 
 const { t } = useI18n()
 
-defineProps<{
+const props = defineProps<{
   error: SerializedErrorInfo
+  compact?: boolean
 }>()
 
 const showDetail = ref(false)
@@ -18,7 +19,20 @@ function getDisplayMessage(error: SerializedErrorInfo): string {
 </script>
 
 <template>
+  <button
+    v-if="props.compact"
+    type="button"
+    class="flex w-full min-w-0 items-start gap-2 rounded-md py-1 text-left text-xs text-amber-700 transition-colors hover:bg-amber-50/70 dark:text-amber-300 dark:hover:bg-amber-950/20"
+    @click="showDetail = true"
+  >
+    <UIcon name="i-heroicons-exclamation-circle" class="mt-0.5 h-3.5 w-3.5 shrink-0 text-amber-500" />
+    <span class="min-w-0 flex-1 truncate">{{ getDisplayMessage(error) }}</span>
+    <span class="shrink-0 text-[11px] text-amber-600/80 dark:text-amber-400/80">
+      {{ t('ai.chat.error.viewDetail') }}
+    </span>
+  </button>
   <div
+    v-else
     class="group relative my-2 w-full min-w-[320px] cursor-pointer rounded-lg border border-red-200 bg-red-50/60 px-3.5 py-3 text-[13px] transition-all duration-200 hover:border-red-300 hover:bg-red-50 dark:border-red-900/30 dark:bg-red-950/20 dark:hover:border-red-800/50 dark:hover:bg-red-950/30"
     @click="showDetail = true"
   >
diff --git a/src/components/AIChat/chat/LiveFollowText.vue b/src/components/AIChat/chat/LiveFollowText.vue
new file mode 100644
index 00000000..4a2a182d
--- /dev/null
+++ b/src/components/AIChat/chat/LiveFollowText.vue
@@ -0,0 +1,61 @@
+<script setup lang="ts">
+import { nextTick, onBeforeUnmount, ref, watch } from 'vue'
+
+const props = withDefaults(
+  defineProps<{
+    text: string
+    followEnd?: boolean
+  }>(),
+  {
+    followEnd: false,
+  }
+)
+
+const el = ref<HTMLSpanElement | null>(null)
+let pendingFrame: number | null = null
+
+function align() {
+  const element = el.value
+  if (!element) return
+  element.scrollLeft = props.followEnd ? Math.max(0, element.scrollWidth - element.clientWidth) : 0
+}
+
+function scheduleAlign() {
+  if (pendingFrame !== null) return
+  let remainingFrames = 3
+  const advance = () => {
+    remainingFrames -= 1
+    if (remainingFrames > 0) {
+      pendingFrame = requestAnimationFrame(advance)
+      return
+    }
+    pendingFrame = null
+    align()
+  }
+  pendingFrame = requestAnimationFrame(advance)
+}
+
+watch(
+  () => [props.text, props.followEnd] as const,
+  async () => {
+    await nextTick()
+    scheduleAlign()
+  },
+  { flush: 'post', immediate: true }
+)
+
+onBeforeUnmount(() => {
+  if (pendingFrame !== null) cancelAnimationFrame(pendingFrame)
+})
+</script>
+
+<template>
+  <span
+    ref="el"
+    class="min-w-0 flex-1 overflow-hidden whitespace-nowrap text-gray-400 dark:text-gray-500"
+    :class="[props.followEnd ? '' : 'text-ellipsis']"
+    :data-follow-end="props.followEnd || undefined"
+  >
+    {{ props.text }}
+  </span>
+</template>
diff --git a/src/components/AIChat/chat/chatMessageProcessSegments.test.ts b/src/components/AIChat/chat/chatMessageProcessSegments.test.ts
index 29e1cd6d..b1583869 100644
--- a/src/components/AIChat/chat/chatMessageProcessSegments.test.ts
+++ b/src/components/AIChat/chat/chatMessageProcessSegments.test.ts
@@ -2,8 +2,10 @@ import assert from 'node:assert/strict'
 import { describe, it } from 'node:test'
 import {
   buildProcessSegments,
+  findRepresentativeProcessThought,
   getProcessSegmentStatusLabel,
   getVisibleSegmentBlocks,
+  resolveProcessHeaderActivity,
 } from './chatMessageProcessSegments'
 
 type TestBlock =
@@ -67,6 +69,30 @@ describe('chat message process segments', () => {
     assert.deepEqual(getVisibleSegmentBlocks(segments), [blocks[1], blocks[6], blocks[7]])
   })
 
+  it('keeps live thinking in the process row while the answer streams visibly', () => {
+    const blocks: TestBlock[] = [
+      { type: 'think', text: '先看这周在聊什么' },
+      { type: 'tool', name: 'search_messages' },
+      { type: 'text', text: '证据拿到了，我再核对统计。' },
+    ]
+
+    const segments = buildProcessSegments(blocks, { isFoldableProcessBlock, isTextBlock })
+
+    assert.deepEqual(segments, [
+      { type: 'process', blocks: blocks.slice(0, 2) },
+      { type: 'visible', block: blocks[2] },
+    ])
+    assert.deepEqual(getVisibleSegmentBlocks(segments), [blocks[2]])
+  })
+
+  it('uses natural-language thinking for the collapsed preview instead of plan JSON', () => {
+    const reasoning = { type: 'think' as const, tag: 'reasoning', text: '先梳理长期变化' }
+    const planValidation = { type: 'think' as const, tag: 'plan_validation', text: '{\n  "title": "分析计划"' }
+
+    assert.equal(findRepresentativeProcessThought([reasoning, planValidation]), reasoning)
+    assert.equal(findRepresentativeProcessThought([planValidation]), undefined)
+  })
+
   it('keeps text visible when no later process block exists', () => {
     const blocks: TestBlock[] = [
       { type: 'tool', name: 'get_members' },
@@ -118,4 +144,23 @@ describe('chat message process segments', () => {
 
     assert.equal(label, '已处理 1分05秒')
   })
+
+  it('prefers the live tool over the last foldable block while processing', () => {
+    assert.deepEqual(
+      resolveProcessHeaderActivity({
+        isActive: true,
+        activeToolName: 'retrieve_chat_evidence',
+        activeToolProgressPhase: 'semantic_search',
+        lastFoldable: { kind: 'think' },
+      }),
+      { type: 'tool', name: 'retrieve_chat_evidence', progressPhase: 'semantic_search' }
+    )
+    assert.deepEqual(
+      resolveProcessHeaderActivity({
+        isActive: false,
+        lastFoldable: { kind: 'tool', name: 'search_messages' },
+      }),
+      { type: 'generic' }
+    )
+  })
 })
diff --git a/src/components/AIChat/chat/chatMessageProcessSegments.ts b/src/components/AIChat/chat/chatMessageProcessSegments.ts
index 705ba768..d651d4c5 100644
--- a/src/components/AIChat/chat/chatMessageProcessSegments.ts
+++ b/src/components/AIChat/chat/chatMessageProcessSegments.ts
@@ -15,6 +15,12 @@ export interface ProcessSegmentStatusLabelOptions<T> {
   locale: string
 }
 
+interface ProcessThoughtCandidate {
+  type: string
+  tag?: string
+  text?: string
+}
+
 function hasLaterFoldableProcessBlock<T>(
   blocks: T[],
   startIndex: number,
@@ -53,6 +59,18 @@ export function getVisibleSegmentBlocks<T>(segments: ProcessSegment<T>[]): T[] {
   return segments.flatMap((segment) => (segment.type === 'visible' ? [segment.block] : []))
 }
 
+export function findRepresentativeProcessThought<T extends ProcessThoughtCandidate>(
+  blocks: readonly T[]
+): Extract<T, { type: 'think' }> | undefined {
+  for (let index = blocks.length - 1; index >= 0; index -= 1) {
+    const block = blocks[index]
+    if (block.type === 'think' && block.tag?.toLowerCase() !== 'plan_validation' && Boolean(block.text?.trim())) {
+      return block as Extract<T, { type: 'think' }>
+    }
+  }
+  return undefined
+}
+
 export function formatProcessDuration(durationMs: number, locale: string): string {
   const totalSeconds = Math.max(0, Math.round(durationMs / 1000))
   if (locale.startsWith('zh') || locale.startsWith('ja')) {
@@ -98,3 +116,43 @@ export function getProcessSegmentStatusLabel<T>(
   const duration = durationMs > 0 ? ` ${formatProcessDuration(durationMs, options.locale)}` : ''
   return `${options.labels.processed}${duration}`
 }
+
+export type ProcessHeaderActivity =
+  | { type: 'tool'; name: string; progressPhase?: string }
+  | { type: 'think' }
+  | { type: 'skill'; name: string }
+  | { type: 'plan' }
+  | { type: 'generic' }
+
+export function resolveProcessHeaderActivity(input: {
+  isActive: boolean
+  activeToolName?: string
+  activeToolProgressPhase?: string
+  lastFoldable?: {
+    kind: 'tool' | 'think' | 'skill' | 'plan' | 'plan_draft' | 'error'
+    name?: string
+  }
+}): ProcessHeaderActivity {
+  if (input.isActive && input.activeToolName) {
+    return {
+      type: 'tool',
+      name: input.activeToolName,
+      progressPhase: input.activeToolProgressPhase,
+    }
+  }
+
+  if (input.isActive && input.lastFoldable) {
+    if (input.lastFoldable.kind === 'think') return { type: 'think' }
+    if (input.lastFoldable.kind === 'skill' && input.lastFoldable.name) {
+      return { type: 'skill', name: input.lastFoldable.name }
+    }
+    if (input.lastFoldable.kind === 'plan' || input.lastFoldable.kind === 'plan_draft') {
+      return { type: 'plan' }
+    }
+    if (input.lastFoldable.kind === 'tool' && input.lastFoldable.name) {
+      return { type: 'tool', name: input.lastFoldable.name }
+    }
+  }
+
+  return { type: 'generic' }
+}
diff --git a/src/components/AIChat/chat/liveFollowText.test.ts b/src/components/AIChat/chat/liveFollowText.test.ts
new file mode 100644
index 00000000..28b7fb8e
--- /dev/null
+++ b/src/components/AIChat/chat/liveFollowText.test.ts
@@ -0,0 +1,22 @@
+import assert from 'node:assert/strict'
+import { describe, it } from 'node:test'
+import { getFirstLine, getLatestLine } from './liveFollowText'
+
+describe('live follow text', () => {
+  it('uses the first line after thinking settles', () => {
+    assert.equal(getFirstLine('Inspect the session\nNewest reasoning tokens'), 'Inspect the session')
+    assert.equal(getFirstLine('one-liner'), 'one-liner')
+  })
+
+  it('follows the latest streaming line, including a line that is still growing', () => {
+    assert.equal(getLatestLine('Inspect the session\nNewest reasoning tokens'), 'Newest reasoning tokens')
+    assert.equal(
+      getLatestLine('Inspect the session\nNewest reasoning tokens keep arriving'),
+      'Newest reasoning tokens keep arriving'
+    )
+    assert.equal(
+      getLatestLine('Inspect the session\nNewest reasoning tokens keep arriving\n'),
+      'Newest reasoning tokens keep arriving'
+    )
+  })
+})
diff --git a/src/components/AIChat/chat/liveFollowText.ts b/src/components/AIChat/chat/liveFollowText.ts
new file mode 100644
index 00000000..58c92768
--- /dev/null
+++ b/src/components/AIChat/chat/liveFollowText.ts
@@ -0,0 +1,10 @@
+export function getFirstLine(text: string): string {
+  const newline = text.indexOf('\n')
+  return newline === -1 ? text : text.slice(0, newline)
+}
+
+export function getLatestLine(text: string): string {
+  const visible = text.trimEnd()
+  const newline = visible.lastIndexOf('\n')
+  return newline === -1 ? visible : visible.slice(newline + 1)
+}
diff --git a/src/components/AIChat/input/AIChatComposer.vue b/src/components/AIChat/input/AIChatComposer.vue
index 8fc7361a..7190c7b9 100644
--- a/src/components/AIChat/input/AIChatComposer.vue
+++ b/src/components/AIChat/input/AIChatComposer.vue
@@ -82,11 +82,10 @@ defineExpose({ focus, getSelection, setSelectionRange, syncHeight })
       embedded
         ? 'bg-transparent'
         : 'rounded-2xl bg-white shadow-[0_2px_14px_rgba(0,0,0,0.04)] ring-1 ring-gray-200/60 dark:bg-page-dark dark:ring-white/5',
-      disabled
-        ? 'bg-gray-50/50 dark:bg-page-dark/50'
-        : embedded
-          ? ''
-          : 'focus-within:ring-primary-500/40 focus-within:shadow-[0_4px_20px_rgba(0,0,0,0.08)] dark:focus-within:ring-primary-500/40',
+      !embedded && disabled ? 'bg-gray-50/50 dark:bg-page-dark/50' : '',
+      !embedded && !disabled
+        ? 'focus-within:ring-primary-500/40 focus-within:shadow-[0_4px_20px_rgba(0,0,0,0.08)] dark:focus-within:ring-primary-500/40'
+        : '',
     ]"
   >
     <div class="relative px-4 pt-2.5 pb-2.5">
diff --git a/src/i18n/locales/en-US/ai.json b/src/i18n/locales/en-US/ai.json
index ee1fda4b..721a6660 100644
--- a/src/i18n/locales/en-US/ai.json
+++ b/src/i18n/locales/en-US/ai.json
@@ -46,6 +46,9 @@
         "label": "Process",
         "processing": "Processing",
         "processed": "Processed",
+        "working": "Working",
+        "planning": "Planning",
+        "failed": "Incomplete",
         "step": "{count} step",
         "steps": "{count} steps"
       },
diff --git a/src/i18n/locales/ja-JP/ai.json b/src/i18n/locales/ja-JP/ai.json
index 325b532f..8bfab08c 100644
--- a/src/i18n/locales/ja-JP/ai.json
+++ b/src/i18n/locales/ja-JP/ai.json
@@ -46,6 +46,9 @@
         "label": "実行過程",
         "processing": "処理中",
         "processed": "処理済み",
+        "working": "処理中",
+        "planning": "計画中",
+        "failed": "未完了",
         "step": "{count} ステップ",
         "steps": "{count} ステップ"
       },
diff --git a/src/i18n/locales/zh-CN/ai.json b/src/i18n/locales/zh-CN/ai.json
index 279db1a8..7c40bafd 100644
--- a/src/i18n/locales/zh-CN/ai.json
+++ b/src/i18n/locales/zh-CN/ai.json
@@ -46,6 +46,9 @@
         "label": "执行过程",
         "processing": "处理中",
         "processed": "已处理",
+        "working": "正在处理",
+        "planning": "正在规划",
+        "failed": "未完成",
         "step": "{count} 步",
         "steps": "{count} 步"
       },
diff --git a/src/i18n/locales/zh-TW/ai.json b/src/i18n/locales/zh-TW/ai.json
index ccc80060..624d6c30 100644
--- a/src/i18n/locales/zh-TW/ai.json
+++ b/src/i18n/locales/zh-TW/ai.json
@@ -46,6 +46,9 @@
         "label": "執行過程",
         "processing": "處理中",
         "processed": "已處理",
+        "working": "正在處理",
+        "planning": "正在規劃",
+        "failed": "未完成",
         "step": "{count} 步",
         "steps": "{count} 步"
       },