diff --git a/ui/src/components/COMPONENT_README.md b/ui/src/components/COMPONENT_README.md
index a8f53d81721..30869b079dc 100644
--- a/ui/src/components/COMPONENT_README.md
+++ b/ui/src/components/COMPONENT_README.md
@@ -979,6 +979,12 @@ Workspace API 内部使用 `getWorkspaceId()`，System 共享 API 不接收工
 `hasMore`。首页失败后通过重新加载首页重试，不从下一页继续。
 Chat、Portal 和 Display 面板直接放置消息列表，并以当前会话 ID 为 `key`，不再包裹额外滚动层。
 
+### Question（对话模块）
+
+`conversation-panel/components/content/items/question/index.vue` 负责提问展示、附件和操作入口。
+同目录 `QuestionEditor.vue` 接收 `content`、`disabled`，维护本次编辑草稿，通过 `cancel` 和
+`send(question)` 通知入口组件；进入时挂载并聚焦，退出时卸载。入口组件负责发送能力与附件传递。
+
 ### SharePanel（对话模块）
 
 `conversation-panel/main/share-panel/index.vue` 展示只读问答，通过 `useSharePanelContentStore()`
diff --git a/ui/src/conversation-panel/components/content/index.vue b/ui/src/conversation-panel/components/content/index.vue
index 1710f0fdb32..f332688b098 100644
--- a/ui/src/conversation-panel/components/content/index.vue
+++ b/ui/src/conversation-panel/components/content/index.vue
@@ -9,7 +9,7 @@ import GroupToolItem from './items/group-tool/index.vue'
 import GroupItem from './items/group/index.vue'
 import FormItem from './items/form.vue'
 import FailureItem from './items/failure.vue'
-import QuestionItem from './items/question.vue'
+import QuestionItem from './items/question/index.vue'
 
 defineOptions({ name: 'ConversationContent' })
 
diff --git a/ui/src/conversation-panel/components/content/items/question/QuestionEditor.vue b/ui/src/conversation-panel/components/content/items/question/QuestionEditor.vue
new file mode 100644
index 00000000000..9194cb988a6
--- /dev/null
+++ b/ui/src/conversation-panel/components/content/items/question/QuestionEditor.vue
@@ -0,0 +1,46 @@
+<script setup lang="ts">
+import { onMounted, ref } from 'vue'
+import type { InputInstance } from 'element-plus'
+
+defineOptions({ name: 'ConversationQuestionEditor' })
+
+const props = defineProps<{ content: string; disabled: boolean }>()
+const emit = defineEmits<{ cancel: []; send: [question: string] }>()
+
+// 每次进入编辑模式创建草稿，取消时随组件卸载丢弃。
+const questionDraft = ref(props.content)
+const editorRef = ref<InputInstance>()
+onMounted(() => editorRef.value?.focus())
+
+function sendQuestion() {
+  if (!props.disabled && questionDraft.value.trim()) emit('send', questionDraft.value)
+}
+</script>
+
+<template>
+  <div class="space-y-3">
+    <!-- 编辑提问正文 -->
+    <el-input
+      ref="editorRef"
+      v-model="questionDraft"
+      type="textarea"
+      :autosize="{ minRows: 1, maxRows: 8 }"
+      resize="none"
+      class="question-editor-input"
+    />
+    <div class="flex justify-end gap-3">
+      <!-- 取消编辑 -->
+      <el-button class="min-w-20" @click="emit('cancel')">取消</el-button>
+      <!-- 发送编辑后的提问 -->
+      <el-button type="primary" class="min-w-20" :disabled="disabled || !questionDraft.trim()" @click="sendQuestion">发送</el-button>
+    </div>
+  </div>
+</template>
+
+<style scoped lang="scss">
+.question-editor-input :deep(.el-textarea__inner) {
+  padding: 0;
+  box-shadow: none;
+  background: transparent;
+}
+</style>
diff --git a/ui/src/conversation-panel/components/content/items/question.vue b/ui/src/conversation-panel/components/content/items/question/index.vue
similarity index 71%
rename from ui/src/conversation-panel/components/content/items/question.vue
rename to ui/src/conversation-panel/components/content/items/question/index.vue
index d20c617ba09..1138b1ff2a5 100644
--- a/ui/src/conversation-panel/components/content/items/question.vue
+++ b/ui/src/conversation-panel/components/content/items/question/index.vue
@@ -1,5 +1,7 @@
 <script setup lang="ts">
-import { computed, inject } from 'vue'
+import { computed, inject, ref, watch } from 'vue'
+import QuestionEditor from './QuestionEditor.vue'
+import { useMessageInputStoreOptional } from '../../../message-input/index'
 import MkAudio from '@/components/global/mk-media-preview/MkAudio.vue'
 import MkVideo from '@/components/global/mk-media-preview/MkVideo.vue'
 import FileUploadCard from '@/components/mk-drag-upload/FileUploadCard.vue'
@@ -9,8 +11,8 @@ import { formatFileSize } from '@/utils/number'
 import { downloadByURL } from '@/utils/common'
 import { copyText } from '@/utils/clipboard'
 
-import { MESSAGE_LIST_KEY } from '../../message-list/index'
-import { CONVERSATION_LIST_KEY } from '../../../left-sidebar/conversation-list/index'
+import { MESSAGE_LIST_KEY } from '../../../message-list/index'
+import { CONVERSATION_LIST_KEY } from '../../../../left-sidebar/conversation-list/index'
 
 defineOptions({ name: 'ConversationQuestionContent' })
 
@@ -31,6 +33,26 @@ type QuestionContent = { content?: string } & Partial<Record<AttachmentField, Qu
 
 const props = defineProps<{ content: QuestionContent }>()
 
+// 编辑保留原提问及附件，发送沿用输入框的新问题流程。
+const messageInput = useMessageInputStoreOptional()
+const editing = ref(false)
+const canEdit = computed(() =>
+  Boolean(messageInput && !messageInput.disabled.value && !messageInput.streamLoading.value && !conversationList?.isShared.value),
+)
+
+function startEditing() {
+  if (canEdit.value) editing.value = true
+}
+
+function sendEditedQuestion(question: string) {
+  if (!canEdit.value || !question.trim()) return
+  messageInput?.sendQuestion(question, { attachments: props.content })
+}
+
+watch(canEdit, (available) => {
+  if (!available) editing.value = false
+})
+
 // 非图片附件统一排列在上方，图片单独放在下方。
 const attachmentFields = ['document_list', 'image_list', 'audio_list', 'video_list', 'other_list'] as const
 const attachments = computed(() =>
@@ -59,7 +81,10 @@ function getAttachmentDescription(file: QuestionAttachment) {
 </script>
 
 <template>
-  <div class="mk-conversation-question-content group/question space-y-3 cursor-pointer">
+  <div
+    class="mk-conversation-question-content group/question space-y-3"
+    :class="editing ? 'question-editor border border-primary rounded-2xl p-3' : 'cursor-pointer'"
+  >
     <!-- 视频、音频和文档共用一行，图片在下方；超出当前宽度时自动换行。 -->
     <div v-if="attachments.length" class="max-w-full space-y-2">
       <template v-for="attachmentGroup in attachmentGroups" :key="attachmentGroup.type">
@@ -99,9 +124,20 @@ function getAttachmentDescription(file: QuestionAttachment) {
         </div>
       </template>
     </div>
-    <div v-if="content.content" class="mk-gray-card-lg ml-auto w-fit max-w-full py-3! whitespace-pre-wrap wrap-anywhere">{{ content.content }}</div>
-    <!-- TODO 用户的操作 -->
-    <div class="h-8 -mt-3 flex items-center justify-end gap-1 invisible group-hover/question:visible">
+    <QuestionEditor v-if="editing" :content="content.content ?? ''" :disabled="!canEdit" @cancel="editing = false" @send="sendEditedQuestion" />
+    <div v-else-if="content.content" class="mk-gray-card-lg ml-auto w-fit max-w-full py-3! whitespace-pre-wrap wrap-anywhere">
+      {{ content.content }}
+    </div>
+    <div
+      v-if="!editing"
+      class="h-8 -mt-3 flex items-center justify-end gap-1 invisible group-hover/question:visible group-focus-within/question:visible"
+    >
+      <!-- 编辑提问 -->
+      <MkTooltip v-if="messageInput" content="编辑">
+        <el-button text :disabled="!canEdit" @click="startEditing">
+          <MkIcon name="icon_edit_outlined" />
+        </el-button>
+      </MkTooltip>
       <!-- 复制提问 -->
       <el-button text @click="copyText(content.content)">
         <MkIcon name="icon_copy_outlined" />
@@ -115,3 +151,9 @@ function getAttachmentDescription(file: QuestionAttachment) {
     </div>
   </div>
 </template>
+
+<style scoped lang="scss">
+.question-editor {
+  width: 100%;
+}
+</style>
diff --git a/ui/src/conversation-panel/components/message-input/index.ts b/ui/src/conversation-panel/components/message-input/index.ts
index 6a256ddab3f..4bacae9da06 100644
--- a/ui/src/conversation-panel/components/message-input/index.ts
+++ b/ui/src/conversation-panel/components/message-input/index.ts
@@ -80,7 +80,6 @@ export function createMessageInputStore(deps: MessageInputDeps) {
   const maxFiles = 10
   const maxSizeMB = 50
 
-  // TODO 格式 不行
   const acceptList = [...IMAGE_EXTENSIONS, ...DOCUMENT_EXTENSIONS, ...VIDEO_EXTENSIONS, ...AUDIO_EXTENSIONS].map((e) => `.${e}`).join(',')
 
   // 语音输入：智能体开启语音转文字且当前模式提供接口时可用
diff --git a/ui/src/conversation-panel/left-sidebar/portal-conversation-list/index.ts b/ui/src/conversation-panel/left-sidebar/portal-conversation-list/index.ts
index 0c947175549..4e17d7d931e 100644
--- a/ui/src/conversation-panel/left-sidebar/portal-conversation-list/index.ts
+++ b/ui/src/conversation-panel/left-sidebar/portal-conversation-list/index.ts
@@ -85,6 +85,35 @@ export function createPortalConversationListStore(deps: PortalConversationListDe
     }
   }
 
+  // 先查询全部分组和会话，再删除，避免边删除边翻页造成记录遗漏。
+  const clearConversations = async (onRemoved: (applicationId: string, chatId: string) => void) => {
+    const applicationIds = new Set<string>()
+    for (let page = 1; ; page++) {
+      const response = await pageApplicationConversations(page, APPLICATION_PAGE_SIZE)
+      const records = response.records ?? []
+      records.forEach((application) => applicationIds.add(application.id))
+      if (records.length < APPLICATION_PAGE_SIZE) break
+    }
+
+    const pendingConversations: { applicationId: string; chatId: string }[] = []
+    for (const applicationId of applicationIds) {
+      for (let page = 1; ; page++) {
+        const response = await pageGroupConversations(applicationId, page, APPLICATION_PAGE_SIZE)
+        // 查询失败不得当作空页继续删除。
+        if (!response) throw new Error('获取历史对话失败')
+        const records = response.records ?? []
+        records.forEach((conversation) => pendingConversations.push({ applicationId, chatId: conversation.id }))
+        if (records.length < APPLICATION_PAGE_SIZE) break
+      }
+    }
+
+    for (const { applicationId, chatId } of pendingConversations) {
+      await deleteGroupConversation(applicationId, chatId)
+      onRemoved(applicationId, chatId)
+    }
+    await loadApplicationGroups()
+  }
+
   // 按名称查询可访问的智能体，全部智能体页与选择智能体抽屉各自维护搜索条件与结果
   const fetchApplications = (keyword: string) => pageApplications(1, APPLICATION_PAGE_SIZE, keyword.trim()).then((response) => response.records ?? [])
 
@@ -116,6 +145,7 @@ export function createPortalConversationListStore(deps: PortalConversationListDe
     loadApplicationGroups,
     toggleGroup,
     deleteGroupConversation,
+    clearConversations,
     applications,
     applicationKeyword,
     isApplicationsLoading,
diff --git a/ui/src/conversation-panel/left-sidebar/portal-conversation-list/index.vue b/ui/src/conversation-panel/left-sidebar/portal-conversation-list/index.vue
index 525e1ff4cb5..ab3b2ca06d7 100644
--- a/ui/src/conversation-panel/left-sidebar/portal-conversation-list/index.vue
+++ b/ui/src/conversation-panel/left-sidebar/portal-conversation-list/index.vue
@@ -1,5 +1,6 @@
 <script setup lang="ts">
 import { computed, ref } from 'vue'
+import { MsgConfirm, MsgSuccess } from '@/utils/message'
 import { relativeTimeFormat } from '@/utils/time'
 import type { Conversation } from '../../core/types'
 import { useConversationListStore } from '../conversation-list/index'
@@ -12,7 +13,7 @@ defineOptions({ name: 'PortalConversationList' })
 
 const portalList = usePortalConversationListStore()
 const { applicationGroups, currentApplicationId, isApplicationListActive, toggleGroup } = portalList
-const { conversations, currentChatId, selectConversation, deleteChat, toggleLeftSide } = useConversationListStore()
+const { conversations, currentChatId, selectConversation, deleteChat, newConversation, switchShared, toggleLeftSide } = useConversationListStore()
 
 const historyApplicationId = ref('')
 const historyVisible = ref(false)
@@ -50,6 +51,30 @@ const handleDeleteConversation = (group: PortalApplicationGroup, conversation: C
   if (isCurrentApplication(group)) return deleteChat(conversation.id).then(() => portalList.loadApplicationGroups())
   else portalList.deleteGroupConversation(group.id, conversation.id)
 }
+// 清空所有智能体的历史，删除成功后同步当前会话；失败时保留尚未删除的记录。
+const clearing = ref(false)
+const handleClearConversations = () => {
+  if (clearing.value) return
+  clearing.value = true
+  MsgConfirm('确认清空全部历史对话？', '将清空所有智能体的历史对话，清空后无法恢复。', { confirmButtonText: '清空' })
+    .then(() => {
+      historyVisible.value = false
+      return portalList
+        .clearConversations((applicationId, chatId) => {
+          if (applicationId !== currentApplicationId.value) return
+          conversations.value = conversations.value.filter((conversation) => conversation.id !== chatId)
+          if (currentChatId.value === chatId) {
+            switchShared(false)
+            newConversation()
+          }
+        })
+        .then(() => MsgSuccess('清空成功'))
+    })
+    .catch(() => {})
+    .finally(() => {
+      clearing.value = false
+    })
+}
 </script>
 
 <template>
@@ -83,14 +108,16 @@ const handleDeleteConversation = (group: PortalApplicationGroup, conversation: C
     <div class="flex-between pl-2 mt-4">
       <h6 class="text-N600 font-medium">历史对话</h6>
 
-      <!-- // TODO: 全部清空对话 -->
-      <el-button text>
-        <MkIcon name="icon_delete-trash_outlined" />
-      </el-button>
+      <MkTooltip content="清空">
+        <!-- 清空所有智能体的历史对话 -->
+        <el-button text :loading="clearing" :disabled="!historyApplicationGroups.length" @click="handleClearConversations">
+          <MkIcon name="icon_delete-trash_outlined" />
+        </el-button>
+      </MkTooltip>
     </div>
 
     <!-- 历史列表独立滚动，门户入口和新建入口保持固定。 -->
-    <el-scrollbar class="min-h-0 flex-1 mt-1 -mr-4" view-class="pr-4">
+    <el-scrollbar :inert="clearing" class="min-h-0 flex-1 mt-1 -mr-4" view-class="pr-4">
       <div v-if="historyApplicationGroups.length === 0" class="text-N600 text-center mt-4">暂无历史记录</div>
       <div v-else class="space-y-1">
         <template v-for="group in historyApplicationGroups" :key="group.id">
diff --git a/ui/src/views/chat/share/index.vue b/ui/src/views/chat/share/index.vue
index b05033c1029..0f4df42848a 100644
--- a/ui/src/views/chat/share/index.vue
+++ b/ui/src/views/chat/share/index.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed, onMounted, provide, ref, watch } from 'vue'
+import { computed, onMounted, provide, ref } from 'vue'
 import { useRoute } from 'vue-router'
 import ConversationApi from '@/api/chat/conversation'
 import type { ChatShareDetail } from '@/api/types'