diff --git a/easyflow-ui-admin/app/src/views/ai/agent-chat/index.vue b/easyflow-ui-admin/app/src/views/ai/agent-chat/index.vue
index 77c39649..ce395511 100644
--- a/easyflow-ui-admin/app/src/views/ai/agent-chat/index.vue
+++ b/easyflow-ui-admin/app/src/views/ai/agent-chat/index.vue
@@ -24,6 +24,7 @@ import {
   ChatImageAttachments,
   ChatTimeline,
   ChatTimelineBuilder,
+  defaultAssistantAvatar,
 } from '@easyflow/common-ui';
 import { copyTextToClipboard } from '@easyflow/utils';
 
@@ -1240,6 +1241,7 @@ onBeforeUnmount(() => {
         />
         <ChatTimeline
           v-else
+          :assistant-avatar="selectedAgent?.avatar || defaultAssistantAvatar"
           :items="timelineItems"
           :document-loader="loadAgentChatDocument"
           :image-loader="loadAgentChatImage"
diff --git a/easyflow-ui-admin/app/src/views/ai/agents/AgentList.vue b/easyflow-ui-admin/app/src/views/ai/agents/AgentList.vue
index a7ef1a83..410bc36e 100644
--- a/easyflow-ui-admin/app/src/views/ai/agents/AgentList.vue
+++ b/easyflow-ui-admin/app/src/views/ai/agents/AgentList.vue
@@ -12,6 +12,7 @@ import { computed, markRaw, onMounted, ref } from 'vue';
 import { useRouter } from 'vue-router';
 
 import { useAccess } from '@easyflow/access';
+import { defaultAssistantAvatar } from '@easyflow/common-ui';
 
 import {
   Check,
@@ -25,7 +26,6 @@ import {
 import { ElIcon, ElMessage, ElMessageBox, ElPopover } from 'element-plus';
 import { tryit } from 'radash';
 
-import defaultAgentAvatar from '#/assets/defaultUserAvatar.png';
 import HeaderSearch from '#/components/headerSearch/HeaderSearch.vue';
 import PageData from '#/components/page/PageData.vue';
 import PageSide from '#/components/page/PageSide.vue';
@@ -354,7 +354,7 @@ async function handleDeleteAction(row: AgentInfo) {
             <CardList
               title-field="name"
               icon-field="avatar"
-              :default-icon="defaultAgentAvatar"
+              :default-icon="defaultAssistantAvatar"
               :data="pageList"
               :primary-action="primaryAction"
               :actions="actions"
diff --git a/easyflow-ui-admin/app/src/views/ai/agents/components/AgentTryoutPanel.vue b/easyflow-ui-admin/app/src/views/ai/agents/components/AgentTryoutPanel.vue
index 716816e8..79330129 100644
--- a/easyflow-ui-admin/app/src/views/ai/agents/components/AgentTryoutPanel.vue
+++ b/easyflow-ui-admin/app/src/views/ai/agents/components/AgentTryoutPanel.vue
@@ -17,6 +17,7 @@ import { computed, onBeforeUnmount, onMounted, ref, watch } from 'vue';
 import {
   CHAT_DOCUMENT_SUPPORTED_FORMATS,
   ChatTimeline,
+  defaultAssistantAvatar,
 } from '@easyflow/common-ui';
 import { BrushCleaning } from '@easyflow/icons';
 import { copyTextToClipboard } from '@easyflow/utils';
@@ -395,6 +396,7 @@ async function handleReject(payload: ChatTimelineToolApprovalPayload) {
       />
       <ChatTimeline
         v-else
+        :assistant-avatar="agent.avatar || defaultAssistantAvatar"
         :items="timelineItems"
         :document-loader="loadAgentChatDocument"
         :image-loader="loadAgentChatImage"
diff --git a/easyflow-ui-admin/app/src/views/ai/agents/components/AgentWelcomeState.vue b/easyflow-ui-admin/app/src/views/ai/agents/components/AgentWelcomeState.vue
index 64c05f39..63aef32e 100644
--- a/easyflow-ui-admin/app/src/views/ai/agents/components/AgentWelcomeState.vue
+++ b/easyflow-ui-admin/app/src/views/ai/agents/components/AgentWelcomeState.vue
@@ -1,11 +1,13 @@
 <script setup lang="ts">
-import { computed, ref, watch } from 'vue';
+import { ref } from 'vue';
+
+import { ChatAssistantAvatar } from '@easyflow/common-ui';
 
 import { ArrowRight } from '@element-plus/icons-vue';
 import { useResizeObserver } from '@vueuse/core';
 import { ElIcon } from 'element-plus';
 
-const props = defineProps<{
+defineProps<{
   agentName: string;
   avatar?: string;
   disabled?: boolean;
@@ -17,11 +19,9 @@ const emit = defineEmits<{
   selectQuestion: [question: string];
 }>();
 
-const avatarFailed = ref(false);
 const welcomeRef = ref<HTMLElement>();
 const legacyCompact = ref(false);
 const headingId = `agent-welcome-${Math.random().toString(36).slice(2, 9)}`;
-const initial = computed(() => [...props.agentName.trim()][0] || 'A');
 const needsContainerQueryFallback =
   typeof CSS === 'undefined' || !CSS.supports('container-type', 'inline-size');
 
@@ -29,13 +29,6 @@ useResizeObserver(welcomeRef, ([entry]) => {
   if (!needsContainerQueryFallback || !entry) return;
   legacyCompact.value = entry.contentRect.width <= 560;
 });
-
-watch(
-  () => props.avatar,
-  () => {
-    avatarFailed.value = false;
-  },
-);
 </script>
 
 <template>
@@ -47,13 +40,7 @@ watch(
   >
     <div class="agent-welcome__content">
       <div class="agent-welcome__avatar" aria-hidden="true">
-        <img
-          v-if="avatar && !avatarFailed"
-          :src="avatar"
-          alt=""
-          @error="avatarFailed = true"
-        />
-        <span v-else>{{ initial }}</span>
+        <ChatAssistantAvatar :src="avatar" />
       </div>
       <h2 :id="headingId" class="agent-welcome__name">{{ agentName }}</h2>
       <p class="agent-welcome__message">{{ welcomeMessage }}</p>
@@ -112,12 +99,6 @@ watch(
   border-radius: var(--radius-panel);
 }
 
-.agent-welcome__avatar img {
-  width: 100%;
-  height: 100%;
-  object-fit: cover;
-}
-
 .agent-welcome__name {
   margin: var(--space-3) 0 0;
   font-size: 16px;
diff --git a/easyflow-ui-admin/app/src/views/ai/workflow/components/WorkflowChatPage.vue b/easyflow-ui-admin/app/src/views/ai/workflow/components/WorkflowChatPage.vue
index 3197deb5..63d80af8 100644
--- a/easyflow-ui-admin/app/src/views/ai/workflow/components/WorkflowChatPage.vue
+++ b/easyflow-ui-admin/app/src/views/ai/workflow/components/WorkflowChatPage.vue
@@ -15,7 +15,7 @@ import type {
 import { computed, nextTick, onBeforeUnmount, onMounted, ref } from 'vue';
 import { useRoute } from 'vue-router';
 
-import { ChatTimeline } from '@easyflow/common-ui';
+import { ChatTimeline, defaultAssistantAvatar } from '@easyflow/common-ui';
 
 import {
   ArrowLeft,
@@ -931,8 +931,10 @@ function executionTraceText(
       <template v-else>
         <ChatTimeline
           class="workflow-chat__timeline"
+          :assistant-avatar="defaultAssistantAvatar"
           :items="timelineItems"
           :empty-text="emptyText"
+          :empty-title="descriptor.title || '工作流'"
           :copy-action="copyMessage"
           :copyable="(item) => item.parts.some((part) => part.content)"
         >
diff --git a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatAssistantAvatar.vue b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatAssistantAvatar.vue
new file mode 100644
index 00000000..72e3b923
--- /dev/null
+++ b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatAssistantAvatar.vue
@@ -0,0 +1,52 @@
+<script setup lang="ts">
+import { computed, ref, watch } from 'vue';
+
+import { defaultAssistantAvatar } from './assistantAvatar';
+
+const props = defineProps<{
+  src?: string;
+}>();
+
+const imageFailed = ref(false);
+const avatarSrc = computed(() => {
+  const source = props.src?.trim();
+  return imageFailed.value || !source ? defaultAssistantAvatar : source;
+});
+
+watch(
+  () => props.src,
+  () => {
+    imageFailed.value = false;
+  },
+);
+
+function handleImageError() {
+  if (avatarSrc.value !== defaultAssistantAvatar) {
+    imageFailed.value = true;
+  }
+}
+</script>
+
+<template>
+  <span class="chat-assistant-avatar" aria-hidden="true">
+    <img :src="avatarSrc" alt="" @error="handleImageError" />
+  </span>
+</template>
+
+<style scoped>
+.chat-assistant-avatar,
+.chat-assistant-avatar img {
+  display: block;
+  width: 100%;
+  height: 100%;
+}
+
+.chat-assistant-avatar {
+  overflow: hidden;
+  border-radius: inherit;
+}
+
+.chat-assistant-avatar img {
+  object-fit: cover;
+}
+</style>
diff --git a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatTimeline.vue b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatTimeline.vue
index df05ec22..30fc60c2 100644
--- a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatTimeline.vue
+++ b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatTimeline.vue
@@ -9,14 +9,17 @@ import type {
 
 import { computed, nextTick, onBeforeUnmount, ref, watch } from 'vue';
 
+import ChatAssistantAvatar from './ChatAssistantAvatar.vue';
 import ChatTimelineItem from './ChatTimelineItem.vue';
 
 const props = defineProps<{
   approvalLoading?: boolean;
+  assistantAvatar?: string;
   copyable?: (item: ChatTimelineMessageItem) => boolean;
   copyAction?: (item: ChatTimelineMessageItem) => boolean | Promise<boolean>;
   documentLoader?: ChatDocumentLoader;
   emptyText?: string;
+  emptyTitle?: string;
   imageLoader?: ChatImageLoader;
   items: ChatTimelineItemType[];
   regenerable?: (item: ChatTimelineMessageItem) => boolean;
@@ -143,7 +146,16 @@ watch(
     @scroll.passive="handleTimelineScroll"
   >
     <div v-if="items.length === 0" class="chat-timeline__empty">
-      <div class="chat-timeline__empty-icon" aria-hidden="true"></div>
+      <div
+        class="chat-timeline__empty-icon"
+        :class="{ 'has-avatar': assistantAvatar }"
+        aria-hidden="true"
+      >
+        <ChatAssistantAvatar v-if="assistantAvatar" :src="assistantAvatar" />
+      </div>
+      <div v-if="emptyTitle" class="chat-timeline__empty-title">
+        {{ emptyTitle }}
+      </div>
       <div class="chat-timeline__empty-text">
         {{ emptyText || '开始对话' }}
       </div>
@@ -158,6 +170,7 @@ watch(
         <ChatTimelineItem
           v-else
           :assistant-actions-visible="isAssistantActionAnchor(item)"
+          :assistant-avatar="assistantAvatar"
           :item="item"
           :document-loader="documentLoader"
           :image-loader="imageLoader"
@@ -185,7 +198,7 @@ watch(
   display: flex;
   flex: 1;
   flex-direction: column;
-  gap: 12px;
+  gap: var(--space-3);
   min-height: 0;
   padding: 16px;
   overflow: auto;
@@ -200,11 +213,17 @@ watch(
   border-radius: 8px;
 }
 
+.chat-timeline__empty-icon.has-avatar {
+  background: transparent;
+  border: 0;
+  border-radius: var(--radius-panel);
+}
+
 .chat-timeline__empty {
   display: flex;
   flex: 1;
   flex-direction: column;
-  gap: 12px;
+  gap: var(--space-2);
   align-items: center;
   justify-content: center;
   min-height: 180px;
@@ -215,4 +234,11 @@ watch(
   font-size: 13px;
   line-height: 20px;
 }
+
+.chat-timeline__empty-title {
+  font-size: 16px;
+  font-weight: 600;
+  line-height: 24px;
+  color: hsl(var(--text-strong));
+}
 </style>
diff --git a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatTimelineItem.vue b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatTimelineItem.vue
index 54afbc46..2a3b6194 100644
--- a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatTimelineItem.vue
+++ b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatTimelineItem.vue
@@ -11,6 +11,7 @@ import type {
 import { computed, ref } from 'vue';
 
 import ChatThinkingBlock from '../chat-thinking/ChatThinkingBlock.vue';
+import ChatAssistantAvatar from './ChatAssistantAvatar.vue';
 import ChatDocumentAttachments from './ChatDocumentAttachments.vue';
 import ChatErrorNotice from './ChatErrorNotice.vue';
 import ChatImageAttachments from './ChatImageAttachments.vue';
@@ -23,6 +24,7 @@ import ChatToolCard from './ChatToolCard.vue';
 const props = defineProps<{
   approvalLoading?: boolean;
   assistantActionsVisible?: boolean;
+  assistantAvatar?: string;
   copyable?: boolean;
   copyAction?: (item: ChatTimelineMessageItem) => boolean | Promise<boolean>;
   documentLoader?: ChatDocumentLoader;
@@ -56,6 +58,18 @@ const alignmentClass = computed(() => {
   return 'is-assistant';
 });
 
+const showAssistantAvatar = computed(
+  () =>
+    messageItem.value?.role === 'assistant' && Boolean(props.assistantAvatar),
+);
+
+const showStatusAvatar = computed(
+  () =>
+    props.item.type === 'status' &&
+    props.item.presentation !== 'separator' &&
+    Boolean(props.assistantAvatar),
+);
+
 const variantCurrent = computed(() => {
   const item = messageItem.value;
   return Number(item?.selectedVariantIndex || item?.variantIndex || 1);
@@ -158,68 +172,82 @@ function handleCopyAction() {
   <div class="chat-timeline-item" :class="alignmentClass">
     <div
       v-if="messageItem"
-      class="chat-timeline-item__message"
+      class="chat-timeline-item__message-row"
       :class="[
         `is-${messageItem.role}`,
-        { 'has-variant-navigator': showVariantNavigator },
+        {
+          'has-assistant-avatar': showAssistantAvatar,
+          'has-variant-navigator': showVariantNavigator,
+        },
       ]"
     >
-      <ChatImageAttachments
-        v-if="messageItem.images?.length"
-        :items="messageItem.images"
-        :image-loader="imageLoader"
-        compact
-      />
-      <ChatDocumentAttachments
-        v-if="messageItem.documents?.length"
-        :items="messageItem.documents"
-        :document-loader="documentLoader"
-        compact
-      />
       <div
-        v-if="hasMessageBubble(messageItem)"
-        class="chat-timeline-item__bubble"
+        v-if="showAssistantAvatar"
+        class="chat-timeline-item__assistant-avatar"
+      >
+        <ChatAssistantAvatar :src="assistantAvatar" />
+      </div>
+      <div
+        class="chat-timeline-item__message"
         :class="`is-${messageItem.role}`"
       >
-        <template v-for="part in getMessageParts(messageItem)" :key="part.id">
-          <ChatThinkingBlock
-            v-if="part.type === 'thinking'"
-            :content="part.content"
-            :expanded="resolveThinkingExpanded(part)"
-            :status="part.status"
-            class="chat-timeline-item__thinking"
-            readonly
-            @update:expanded="updateThinkingExpanded(part.id, $event)"
+        <ChatImageAttachments
+          v-if="messageItem.images?.length"
+          :items="messageItem.images"
+          :image-loader="imageLoader"
+          compact
+        />
+        <ChatDocumentAttachments
+          v-if="messageItem.documents?.length"
+          :items="messageItem.documents"
+          :document-loader="documentLoader"
+          compact
+        />
+        <div
+          v-if="hasMessageBubble(messageItem)"
+          class="chat-timeline-item__bubble"
+          :class="`is-${messageItem.role}`"
+        >
+          <template v-for="part in getMessageParts(messageItem)" :key="part.id">
+            <ChatThinkingBlock
+              v-if="part.type === 'thinking'"
+              :content="part.content"
+              :expanded="resolveThinkingExpanded(part)"
+              :status="part.status"
+              class="chat-timeline-item__thinking"
+              readonly
+              @update:expanded="updateThinkingExpanded(part.id, $event)"
+            />
+            <ChatTextBlock
+              v-else
+              :content="part.content"
+              :streaming="messageItem.status === 'streaming'"
+            />
+          </template>
+          <ChatKnowledgeCard
+            v-if="messageItem.knowledgeItems?.length"
+            :items="messageItem.knowledgeItems"
           />
-          <ChatTextBlock
-            v-else
-            :content="part.content"
-            :streaming="messageItem.status === 'streaming'"
-          />
-        </template>
-        <ChatKnowledgeCard
-          v-if="messageItem.knowledgeItems?.length"
-          :items="messageItem.knowledgeItems"
+        </div>
+        <ChatMessageToolbar
+          v-if="showToolbar && messageItem"
+          :align="messageItem.role === 'user' ? 'end' : 'start'"
+          :allow-copy="copyable"
+          :allow-regenerate="regenerable"
+          :copy-action="copyAction ? handleCopyAction : undefined"
+          :disabled-variant-next="disabledVariantNext"
+          :disabled-variant-previous="disabledVariantPrevious"
+          :regenerate-disabled="regenerateDisabled"
+          :show-variant-navigator="showVariantNavigator"
+          :variant-current="variantCurrent"
+          :variant-loading="variantLoading"
+          :variant-total="variantTotal"
+          @copy="emit('copyMessage', messageItem)"
+          @regenerate="emit('regenerateMessage', messageItem)"
+          @select-next-variant="emit('selectNextVariant', messageItem)"
+          @select-previous-variant="emit('selectPreviousVariant', messageItem)"
         />
       </div>
-      <ChatMessageToolbar
-        v-if="showToolbar && messageItem"
-        :align="messageItem.role === 'user' ? 'end' : 'start'"
-        :allow-copy="copyable"
-        :allow-regenerate="regenerable"
-        :copy-action="copyAction ? handleCopyAction : undefined"
-        :disabled-variant-next="disabledVariantNext"
-        :disabled-variant-previous="disabledVariantPrevious"
-        :regenerate-disabled="regenerateDisabled"
-        :show-variant-navigator="showVariantNavigator"
-        :variant-current="variantCurrent"
-        :variant-loading="variantLoading"
-        :variant-total="variantTotal"
-        @copy="emit('copyMessage', messageItem)"
-        @regenerate="emit('regenerateMessage', messageItem)"
-        @select-next-variant="emit('selectNextVariant', messageItem)"
-        @select-previous-variant="emit('selectPreviousVariant', messageItem)"
-      />
     </div>
     <ChatToolCard
       v-else-if="item.type === 'tool'"
@@ -232,7 +260,16 @@ function handleCopyAction() {
       v-else-if="item.type === 'knowledge'"
       :items="item.items"
     />
-    <ChatTimelineStatusRow v-else-if="item.type === 'status'" :item="item" />
+    <div
+      v-else-if="item.type === 'status'"
+      class="chat-timeline-item__status-row"
+      :class="{ 'has-assistant-avatar': showStatusAvatar }"
+    >
+      <div v-if="showStatusAvatar" class="chat-timeline-item__assistant-avatar">
+        <ChatAssistantAvatar :src="assistantAvatar" />
+      </div>
+      <ChatTimelineStatusRow :item="item" />
+    </div>
     <ChatErrorNotice
       v-else-if="item.type === 'error'"
       :message="item.message"
@@ -244,6 +281,8 @@ function handleCopyAction() {
 .chat-timeline-item {
   display: flex;
   width: 100%;
+  --chat-assistant-avatar-size: 28px;
+  --chat-message-max-width: 680px;
 }
 
 .chat-timeline-item.is-user {
@@ -254,6 +293,46 @@ function handleCopyAction() {
   justify-content: flex-start;
 }
 
+.chat-timeline-item__message-row {
+  display: flex;
+  min-width: 0;
+  max-width: min(78%, var(--chat-message-max-width));
+}
+
+.chat-timeline-item__message-row.is-user {
+  justify-content: flex-end;
+}
+
+.chat-timeline-item__message-row.is-assistant {
+  gap: var(--space-2);
+  align-items: flex-start;
+}
+
+.chat-timeline-item__message-row.has-assistant-avatar {
+  max-width: min(
+    78%,
+    calc(
+      var(--chat-message-max-width) + var(--chat-assistant-avatar-size) +
+        var(--space-2)
+    )
+  );
+}
+
+.chat-timeline-item__assistant-avatar {
+  flex: 0 0 var(--chat-assistant-avatar-size);
+  width: var(--chat-assistant-avatar-size);
+  height: var(--chat-assistant-avatar-size);
+  overflow: hidden;
+  border-radius: var(--radius-control);
+}
+
+.chat-timeline-item__status-row {
+  display: flex;
+  gap: var(--space-2);
+  align-items: flex-start;
+  min-width: 0;
+}
+
 .chat-timeline-item__bubble {
   display: flex;
   flex-direction: column;
@@ -268,7 +347,7 @@ function handleCopyAction() {
   flex-direction: column;
   gap: 0;
   min-width: 0;
-  max-width: min(78%, 680px);
+  max-width: var(--chat-message-max-width);
 }
 
 .chat-timeline-item__message.is-user {
@@ -294,8 +373,23 @@ function handleCopyAction() {
   line-height: 22px;
 }
 
-.chat-timeline-item__message.is-assistant.has-variant-navigator {
-  width: min(78%, 680px);
+.chat-timeline-item__message-row.has-variant-navigator {
+  width: min(78%, var(--chat-message-max-width));
+}
+
+.chat-timeline-item__message-row.has-assistant-avatar.has-variant-navigator {
+  width: min(
+    78%,
+    calc(
+      var(--chat-message-max-width) + var(--chat-assistant-avatar-size) +
+        var(--space-2)
+    )
+  );
+}
+
+.chat-timeline-item__message-row.has-assistant-avatar.has-variant-navigator
+  .chat-timeline-item__message {
+  width: calc(100% - var(--chat-assistant-avatar-size) - var(--space-2));
 }
 
 .chat-timeline-item__bubble.is-assistant,
diff --git a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/__tests__/ChatTimelineAvatar.test.ts b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/__tests__/ChatTimelineAvatar.test.ts
new file mode 100644
index 00000000..3cb9a219
--- /dev/null
+++ b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/__tests__/ChatTimelineAvatar.test.ts
@@ -0,0 +1,131 @@
+import type { ChatTimelineItem } from '../types';
+
+import { mount } from '@vue/test-utils';
+
+import { describe, expect, it } from 'vitest';
+
+import { defaultAssistantAvatar } from '../assistantAvatar';
+import ChatTimeline from '../ChatTimeline.vue';
+
+function assistantMessage(): Extract<ChatTimelineItem, { type: 'message' }> {
+  return {
+    id: 'assistant-message',
+    parts: [{ content: '已完成', id: 'text-1', type: 'text' }],
+    role: 'assistant',
+    type: 'message',
+  };
+}
+
+describe('chat timeline assistant avatar', () => {
+  it('renders the configured assistant identity in the empty state', () => {
+    const wrapper = mount(ChatTimeline, {
+      props: {
+        assistantAvatar: '/assistant.svg',
+        emptyTitle: '数据查询',
+        emptyText: '输入问题开始运行',
+        items: [],
+      },
+    });
+
+    expect(wrapper.find('.chat-timeline__empty-title').text()).toBe('数据查询');
+    expect(
+      wrapper.find('.chat-timeline__empty-icon img').attributes('src'),
+    ).toBe('/assistant.svg');
+  });
+
+  it('renders the assistant avatar only next to assistant messages', () => {
+    const wrapper = mount(ChatTimeline, {
+      props: {
+        assistantAvatar: '/assistant.svg',
+        items: [
+          {
+            id: 'user-message',
+            parts: [{ content: '你好', id: 'text-2', type: 'text' }],
+            role: 'user',
+            type: 'message',
+          },
+          assistantMessage(),
+        ],
+      },
+    });
+
+    expect(
+      wrapper.findAll('.chat-timeline-item__assistant-avatar'),
+    ).toHaveLength(1);
+    expect(
+      wrapper
+        .find('.chat-timeline-item__assistant-avatar img')
+        .attributes('src'),
+    ).toBe('/assistant.svg');
+  });
+
+  it('renders the assistant avatar beside inline running statuses', () => {
+    const wrapper = mount(ChatTimeline, {
+      props: {
+        assistantAvatar: '/assistant.svg',
+        items: [
+          {
+            id: 'running-status',
+            label: '正在运行 · 大模型',
+            status: 'running',
+            statusKey: 'workflow-running',
+            type: 'status',
+          },
+        ],
+      },
+    });
+
+    expect(
+      wrapper.findAll(
+        '.chat-timeline-item__status-row .chat-timeline-item__assistant-avatar',
+      ),
+    ).toHaveLength(1);
+    expect(
+      wrapper.find('.chat-timeline-item__status-row img').attributes('src'),
+    ).toBe('/assistant.svg');
+  });
+
+  it('keeps separator statuses unchanged', () => {
+    const wrapper = mount(ChatTimeline, {
+      props: {
+        assistantAvatar: '/assistant.svg',
+        items: [
+          {
+            id: 'separator-status',
+            label: '今天',
+            presentation: 'separator',
+            status: 'done',
+            statusKey: 'date-separator',
+            type: 'status',
+          },
+        ],
+      },
+    });
+
+    expect(
+      wrapper.find('.chat-timeline-item__status-row').classes(),
+    ).not.toContain('has-assistant-avatar');
+    expect(
+      wrapper.findAll('.chat-timeline-item__assistant-avatar'),
+    ).toHaveLength(0);
+  });
+
+  it('falls back to the bundled avatar when a custom image cannot load', async () => {
+    const wrapper = mount(ChatTimeline, {
+      props: {
+        assistantAvatar: '/broken-avatar.svg',
+        items: [assistantMessage()],
+      },
+    });
+
+    await wrapper
+      .find('.chat-timeline-item__assistant-avatar img')
+      .trigger('error');
+
+    expect(
+      wrapper
+        .find('.chat-timeline-item__assistant-avatar img')
+        .attributes('src'),
+    ).toBe(defaultAssistantAvatar);
+  });
+});
diff --git a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/assets/default-assistant-avatar.png b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/assets/default-assistant-avatar.png
new file mode 100644
index 00000000..b8196f59
Binary files /dev/null and b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/assets/default-assistant-avatar.png differ
diff --git a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/assistantAvatar.ts b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/assistantAvatar.ts
new file mode 100644
index 00000000..82626487
--- /dev/null
+++ b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/assistantAvatar.ts
@@ -0,0 +1,2 @@
+/** EasyFlow 聊天助手的默认头像。 */
+export { default as defaultAssistantAvatar } from './assets/default-assistant-avatar.png';
diff --git a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/index.ts b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/index.ts
index 1a996e34..d3ea7cc9 100644
--- a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/index.ts
+++ b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/index.ts
@@ -1,4 +1,6 @@
+export { defaultAssistantAvatar } from './assistantAvatar';
 export { ChatTimelineBuilder } from './builder';
+export { default as ChatAssistantAvatar } from './ChatAssistantAvatar.vue';
 export { default as ChatDocumentAttachments } from './ChatDocumentAttachments.vue';
 export { default as ChatErrorNotice } from './ChatErrorNotice.vue';
 export { default as ChatImageAttachments } from './ChatImageAttachments.vue';